Stroke

A large percentage of studies in neurology and psychiatry over the past decade have failed to account for differences between the sexes, according to a team of Canadian researchers.

In a survey of more than 3,000 papers published in six neuroscience and psychiatry journals from 2009 to 2019, researchers found that only 5% analyzed sex as a variable.

“Despite the fact there are papers that are using males and females in the studies, they’re not using the males and females in the way that would optimally find the possibility of sex differences,” lead author Liisa A.M. Galea, PhD, told this news organization. Dr. Galea is a professor and distinguished scholar at the Djavad Mowafaghian Center for Brain Health at the University of British Columbia in Vancouver.

The study was published online in Nature Communications.
 

Optimal design uncommon

Differences in how neurologic and psychiatric diseases affect men and women have been well documented. Women, for example, are more susceptible to severe stroke, and men are more prone to cognitive decline with schizophrenia. With Alzheimer’s disease, women typically have more severe cognitive defects.

The researchers surveyed 3,193 papers that included a multitude of studies. Although most of the papers reported studies that included both sexes, only 19% of surveyed studies used what Dr. Galea called an optimal design for the discovery of sex differences. “What I mean by ‘optimally’ is the design of the experiments and the analysis of sex as a variable,” she said. And in 2019, only 5% of the studies used sex as a variable for determining differences between the sexes, the study found.

In the current research, two authors read the methods and results of each study described in each paper, Dr. Galea said. The readers noted whether the paper reported the study sample size and whether the studies used a balanced design. The surveyed journals include Nature Neuroscience, Neuron, Journal of Neuroscience, Molecular Psychiatry, Biological Psychiatry, and Neuropsychopharmacology.
 

‘Not much is changing’

“I had a suspicion that this was happening,” Dr. Galea said. “I didn’t know that it’s so bad, to be fair.” The “good news story,” she said, is that more papers considered sex as a factor in the later years surveyed. In 2019, more than 95% of papers across both disciplines reported participants’ sex, compared with about 70% in 2009. However, less than 20% of the papers in all study years reported studies that used sex optimally to determine differences between the sexes.

“The other thing that shocked me,” Dr. Galea said, “was that even despite the fact that we saw this increase in the number of papers that were using males and females, we didn’t see the sort of corresponding increase in those that were using ‘optimal design’ or ‘optimal analysis,’ ” Dr. Galea said. In 2009, 14% of papers used optimal design and 2% used optimal analysis for determining sex differences. By 2019, those percentages were 19% and 5%, respectively.

But even the papers that used both sexes had shortcomings, the study found. Just over one-third of these papers (34.5%) didn’t use a balanced design. Just over one-quarter (25.9%) didn’t identify the sample size, a shortcoming that marked 18% of these studies in 2009 and 33% in 2019. Fifteen percent of papers examined included studies that used both sexes inconsistently.

“That matters, because other studies have found that about 20% of papers are doing some kind of analysis with sex, but we had a suspicion that a lot of studies would include sex as a covariate,” Dr. Galea said. “Essentially what that does is, you remove that variable from the data. So, any statistical variation due to sex is then gone.

“The problem with that,” she added, “is you’re not actually looking to see if there’s an influence of sex; you’re removing it.”

Dr. Galea noted that this study points to a need for funding agencies to demand that researchers meet their mandates on sex- and gender-based analysis. “Despite the mandates, not much is really changing as far as the analysis or design of experiments, and we need to figure out how to change that,” she said. “We need to figure out how to get researchers more interested to use the power of studying sex differences.”
 

‘Not surprising, but disappointing’

Vladimir Hachinski, MD, professor of neurology and epidemiology at Western University in London, Ont., and former editor in chief of Stroke, told this news organization that women have almost twice the life risk of developing dementia, are at higher risk of stroke below age 35 years, and have more severe strokes and higher rates of disability at any age.

Commenting on the current study, Dr. Hachinski said, “It’s not surprising, but it’s disappointing, because we’ve known the difference for a long time.” He added, “The paper is very important because we were not aware that it was that bad.”

Dr. Hachinski also stated, “This paper needs a lot of reading. It’s a great resource, and it should be highlighted as one of those things that needs to be addressed, because it matters.”

The study was funded by a Natural Sciences and Engineering Research Council of Canada grant and by the British Columbia Women’s Foundation. Dr. Galea and Hachinski had no relevant disclosures.

A version of this article first appeared on Medscape.com.

A large percentage of studies in neurology and psychiatry over the past decade have failed to account for differences between the sexes, according to a team of Canadian researchers.

In a survey of more than 3,000 papers published in six neuroscience and psychiatry journals from 2009 to 2019, researchers found that only 5% analyzed sex as a variable.

“Despite the fact there are papers that are using males and females in the studies, they’re not using the males and females in the way that would optimally find the possibility of sex differences,” lead author Liisa A.M. Galea, PhD, told this news organization. Dr. Galea is a professor and distinguished scholar at the Djavad Mowafaghian Center for Brain Health at the University of British Columbia in Vancouver.

The study was published online in Nature Communications.
 

Optimal design uncommon

Differences in how neurologic and psychiatric diseases affect men and women have been well documented. Women, for example, are more susceptible to severe stroke, and men are more prone to cognitive decline with schizophrenia. With Alzheimer’s disease, women typically have more severe cognitive defects.

The researchers surveyed 3,193 papers that included a multitude of studies. Although most of the papers reported studies that included both sexes, only 19% of surveyed studies used what Dr. Galea called an optimal design for the discovery of sex differences. “What I mean by ‘optimally’ is the design of the experiments and the analysis of sex as a variable,” she said. And in 2019, only 5% of the studies used sex as a variable for determining differences between the sexes, the study found.

In the current research, two authors read the methods and results of each study described in each paper, Dr. Galea said. The readers noted whether the paper reported the study sample size and whether the studies used a balanced design. The surveyed journals include Nature Neuroscience, Neuron, Journal of Neuroscience, Molecular Psychiatry, Biological Psychiatry, and Neuropsychopharmacology.
 

‘Not much is changing’

“I had a suspicion that this was happening,” Dr. Galea said. “I didn’t know that it’s so bad, to be fair.” The “good news story,” she said, is that more papers considered sex as a factor in the later years surveyed. In 2019, more than 95% of papers across both disciplines reported participants’ sex, compared with about 70% in 2009. However, less than 20% of the papers in all study years reported studies that used sex optimally to determine differences between the sexes.

“The other thing that shocked me,” Dr. Galea said, “was that even despite the fact that we saw this increase in the number of papers that were using males and females, we didn’t see the sort of corresponding increase in those that were using ‘optimal design’ or ‘optimal analysis,’ ” Dr. Galea said. In 2009, 14% of papers used optimal design and 2% used optimal analysis for determining sex differences. By 2019, those percentages were 19% and 5%, respectively.

But even the papers that used both sexes had shortcomings, the study found. Just over one-third of these papers (34.5%) didn’t use a balanced design. Just over one-quarter (25.9%) didn’t identify the sample size, a shortcoming that marked 18% of these studies in 2009 and 33% in 2019. Fifteen percent of papers examined included studies that used both sexes inconsistently.

“That matters, because other studies have found that about 20% of papers are doing some kind of analysis with sex, but we had a suspicion that a lot of studies would include sex as a covariate,” Dr. Galea said. “Essentially what that does is, you remove that variable from the data. So, any statistical variation due to sex is then gone.

“The problem with that,” she added, “is you’re not actually looking to see if there’s an influence of sex; you’re removing it.”

Dr. Galea noted that this study points to a need for funding agencies to demand that researchers meet their mandates on sex- and gender-based analysis. “Despite the mandates, not much is really changing as far as the analysis or design of experiments, and we need to figure out how to change that,” she said. “We need to figure out how to get researchers more interested to use the power of studying sex differences.”
 

‘Not surprising, but disappointing’

Vladimir Hachinski, MD, professor of neurology and epidemiology at Western University in London, Ont., and former editor in chief of Stroke, told this news organization that women have almost twice the life risk of developing dementia, are at higher risk of stroke below age 35 years, and have more severe strokes and higher rates of disability at any age.

Commenting on the current study, Dr. Hachinski said, “It’s not surprising, but it’s disappointing, because we’ve known the difference for a long time.” He added, “The paper is very important because we were not aware that it was that bad.”

Dr. Hachinski also stated, “This paper needs a lot of reading. It’s a great resource, and it should be highlighted as one of those things that needs to be addressed, because it matters.”

The study was funded by a Natural Sciences and Engineering Research Council of Canada grant and by the British Columbia Women’s Foundation. Dr. Galea and Hachinski had no relevant disclosures.

A version of this article first appeared on Medscape.com.

A large percentage of studies in neurology and psychiatry over the past decade have failed to account for differences between the sexes, according to a team of Canadian researchers.

In a survey of more than 3,000 papers published in six neuroscience and psychiatry journals from 2009 to 2019, researchers found that only 5% analyzed sex as a variable.

“Despite the fact there are papers that are using males and females in the studies, they’re not using the males and females in the way that would optimally find the possibility of sex differences,” lead author Liisa A.M. Galea, PhD, told this news organization. Dr. Galea is a professor and distinguished scholar at the Djavad Mowafaghian Center for Brain Health at the University of British Columbia in Vancouver.

The study was published online in Nature Communications.
 

Optimal design uncommon

Differences in how neurologic and psychiatric diseases affect men and women have been well documented. Women, for example, are more susceptible to severe stroke, and men are more prone to cognitive decline with schizophrenia. With Alzheimer’s disease, women typically have more severe cognitive defects.

The researchers surveyed 3,193 papers that included a multitude of studies. Although most of the papers reported studies that included both sexes, only 19% of surveyed studies used what Dr. Galea called an optimal design for the discovery of sex differences. “What I mean by ‘optimally’ is the design of the experiments and the analysis of sex as a variable,” she said. And in 2019, only 5% of the studies used sex as a variable for determining differences between the sexes, the study found.

In the current research, two authors read the methods and results of each study described in each paper, Dr. Galea said. The readers noted whether the paper reported the study sample size and whether the studies used a balanced design. The surveyed journals include Nature Neuroscience, Neuron, Journal of Neuroscience, Molecular Psychiatry, Biological Psychiatry, and Neuropsychopharmacology.
 

‘Not much is changing’

“I had a suspicion that this was happening,” Dr. Galea said. “I didn’t know that it’s so bad, to be fair.” The “good news story,” she said, is that more papers considered sex as a factor in the later years surveyed. In 2019, more than 95% of papers across both disciplines reported participants’ sex, compared with about 70% in 2009. However, less than 20% of the papers in all study years reported studies that used sex optimally to determine differences between the sexes.

“The other thing that shocked me,” Dr. Galea said, “was that even despite the fact that we saw this increase in the number of papers that were using males and females, we didn’t see the sort of corresponding increase in those that were using ‘optimal design’ or ‘optimal analysis,’ ” Dr. Galea said. In 2009, 14% of papers used optimal design and 2% used optimal analysis for determining sex differences. By 2019, those percentages were 19% and 5%, respectively.

But even the papers that used both sexes had shortcomings, the study found. Just over one-third of these papers (34.5%) didn’t use a balanced design. Just over one-quarter (25.9%) didn’t identify the sample size, a shortcoming that marked 18% of these studies in 2009 and 33% in 2019. Fifteen percent of papers examined included studies that used both sexes inconsistently.

“That matters, because other studies have found that about 20% of papers are doing some kind of analysis with sex, but we had a suspicion that a lot of studies would include sex as a covariate,” Dr. Galea said. “Essentially what that does is, you remove that variable from the data. So, any statistical variation due to sex is then gone.

“The problem with that,” she added, “is you’re not actually looking to see if there’s an influence of sex; you’re removing it.”

Dr. Galea noted that this study points to a need for funding agencies to demand that researchers meet their mandates on sex- and gender-based analysis. “Despite the mandates, not much is really changing as far as the analysis or design of experiments, and we need to figure out how to change that,” she said. “We need to figure out how to get researchers more interested to use the power of studying sex differences.”
 

‘Not surprising, but disappointing’

Vladimir Hachinski, MD, professor of neurology and epidemiology at Western University in London, Ont., and former editor in chief of Stroke, told this news organization that women have almost twice the life risk of developing dementia, are at higher risk of stroke below age 35 years, and have more severe strokes and higher rates of disability at any age.

Commenting on the current study, Dr. Hachinski said, “It’s not surprising, but it’s disappointing, because we’ve known the difference for a long time.” He added, “The paper is very important because we were not aware that it was that bad.”

Dr. Hachinski also stated, “This paper needs a lot of reading. It’s a great resource, and it should be highlighted as one of those things that needs to be addressed, because it matters.”

The study was funded by a Natural Sciences and Engineering Research Council of Canada grant and by the British Columbia Women’s Foundation. Dr. Galea and Hachinski had no relevant disclosures.

A version of this article first appeared on Medscape.com.

The benefit of endovascular therapy in the treatment of stroke caused by an occlusion of the basilar artery has finally been confirmed in the ATTENTION randomized trial.

The study, conducted in China, showed that endovascular therapy for basilar artery occlusion is associated with higher rates of favorable and independent outcomes, as well as lower overall disability and lower mortality at 90 days, than best medical management alone.

The results were presented by Raul Nogueira, MD, professor of neurology at the University of Pittsburgh School of Medicine, at the European Stroke Organisation Conference (ESOC) 2022, where they were greeted with applause from the audience.

The number needed to treat was just four.

“There were no surprises with secondary endpoints; everything was highly statistically significant,” Dr. Nogueira said.

Specifically, there was a lower rate of overall disability in the shift analysis, with a common odds ratio of 2.8 favoring the intervention.  

Safety results showed an increased risk for symptomatic ICH in the endovascular group (5.3% vs. 0.0%) but, despite that, 90-day mortality was significantly lower in the endovascular group (36.7% vs. 55.3%).

Dr. Nogueira noted a limitation of the study was that it was conducted in China.

“This was a Chinese study and, as Asians are known to have higher rates of intracranial atherosclerotic disease, the overall degree of generalizability of our findings to Western countries needs to be considered,” he commented.

However, subgroup analysis showed no treatment effect modification based on the presence of intracranial atherosclerotic disease, he noted.

Also, the proportion of comorbidities in the ATTENTION trial was similar to that in the BASICS trial, with the same degree of diabetes and atrial fibrillation.

Dr. Nogueira concluded that, in contrast to previous randomized trials of endovascular treatment for basilar artery occlusion, the ATTENTION trial was able to reinforce consecutive enrollment, resulting in a fast recruitment while minimizing crossovers. 

Furthermore, he pointed out that the overall results are consistent with modern era observational studies, large registries, and meta-analysis.

Commenting on the study, Joanna Wardlaw, MD, professor of applied neuroimaging at the University of Edinburgh (Scotland), and chair of the ESOC Planning Group, said: “This is a very important result, since it provides confirmation beyond doubt the benefit of thrombectomy versus medical therapy for basilar artery occlusion stroke up to 12 hours after onset.”

Dr. Wardlaw added: “The trial was large enough to provide clear results and to enable subgroup analyses; no subgroup did not benefit from thrombectomy.”

In a discussion after the presentation, Urs Fischer, MD, chair of the department of neurology at the University Hospital Basel, Switzerland, said he was not surprised by the results of the ATTENTION trial.

“We have been doing thrombectomy in patients with basilar artery occlusion now for 20 years, although trials are extremely important to answer these questions, so now we have some clear evidence,” Dr. Fischer said. “Nevertheless, there are some caveats, as this is an Asian population, but this is a proof of concept, and it is going in the right direction.”

The ATTENTION trial was sponsored by the First Affiliated Hospital of University of Science and Technology of China.

A version of this article first appeared on Medscape.com.

The benefit of endovascular therapy in the treatment of stroke caused by an occlusion of the basilar artery has finally been confirmed in the ATTENTION randomized trial.

The study, conducted in China, showed that endovascular therapy for basilar artery occlusion is associated with higher rates of favorable and independent outcomes, as well as lower overall disability and lower mortality at 90 days, than best medical management alone.

The results were presented by Raul Nogueira, MD, professor of neurology at the University of Pittsburgh School of Medicine, at the European Stroke Organisation Conference (ESOC) 2022, where they were greeted with applause from the audience.

The number needed to treat was just four.

“There were no surprises with secondary endpoints; everything was highly statistically significant,” Dr. Nogueira said.

Specifically, there was a lower rate of overall disability in the shift analysis, with a common odds ratio of 2.8 favoring the intervention.  

Safety results showed an increased risk for symptomatic ICH in the endovascular group (5.3% vs. 0.0%) but, despite that, 90-day mortality was significantly lower in the endovascular group (36.7% vs. 55.3%).

Dr. Nogueira noted a limitation of the study was that it was conducted in China.

“This was a Chinese study and, as Asians are known to have higher rates of intracranial atherosclerotic disease, the overall degree of generalizability of our findings to Western countries needs to be considered,” he commented.

However, subgroup analysis showed no treatment effect modification based on the presence of intracranial atherosclerotic disease, he noted.

Also, the proportion of comorbidities in the ATTENTION trial was similar to that in the BASICS trial, with the same degree of diabetes and atrial fibrillation.

Dr. Nogueira concluded that, in contrast to previous randomized trials of endovascular treatment for basilar artery occlusion, the ATTENTION trial was able to reinforce consecutive enrollment, resulting in a fast recruitment while minimizing crossovers. 

Furthermore, he pointed out that the overall results are consistent with modern era observational studies, large registries, and meta-analysis.

Commenting on the study, Joanna Wardlaw, MD, professor of applied neuroimaging at the University of Edinburgh (Scotland), and chair of the ESOC Planning Group, said: “This is a very important result, since it provides confirmation beyond doubt the benefit of thrombectomy versus medical therapy for basilar artery occlusion stroke up to 12 hours after onset.”

Dr. Wardlaw added: “The trial was large enough to provide clear results and to enable subgroup analyses; no subgroup did not benefit from thrombectomy.”

In a discussion after the presentation, Urs Fischer, MD, chair of the department of neurology at the University Hospital Basel, Switzerland, said he was not surprised by the results of the ATTENTION trial.

“We have been doing thrombectomy in patients with basilar artery occlusion now for 20 years, although trials are extremely important to answer these questions, so now we have some clear evidence,” Dr. Fischer said. “Nevertheless, there are some caveats, as this is an Asian population, but this is a proof of concept, and it is going in the right direction.”

The ATTENTION trial was sponsored by the First Affiliated Hospital of University of Science and Technology of China.

A version of this article first appeared on Medscape.com.

The benefit of endovascular therapy in the treatment of stroke caused by an occlusion of the basilar artery has finally been confirmed in the ATTENTION randomized trial.

The study, conducted in China, showed that endovascular therapy for basilar artery occlusion is associated with higher rates of favorable and independent outcomes, as well as lower overall disability and lower mortality at 90 days, than best medical management alone.

The results were presented by Raul Nogueira, MD, professor of neurology at the University of Pittsburgh School of Medicine, at the European Stroke Organisation Conference (ESOC) 2022, where they were greeted with applause from the audience.

The number needed to treat was just four.

“There were no surprises with secondary endpoints; everything was highly statistically significant,” Dr. Nogueira said.

Specifically, there was a lower rate of overall disability in the shift analysis, with a common odds ratio of 2.8 favoring the intervention.  

Safety results showed an increased risk for symptomatic ICH in the endovascular group (5.3% vs. 0.0%) but, despite that, 90-day mortality was significantly lower in the endovascular group (36.7% vs. 55.3%).

Dr. Nogueira noted a limitation of the study was that it was conducted in China.

“This was a Chinese study and, as Asians are known to have higher rates of intracranial atherosclerotic disease, the overall degree of generalizability of our findings to Western countries needs to be considered,” he commented.

However, subgroup analysis showed no treatment effect modification based on the presence of intracranial atherosclerotic disease, he noted.

Also, the proportion of comorbidities in the ATTENTION trial was similar to that in the BASICS trial, with the same degree of diabetes and atrial fibrillation.

Dr. Nogueira concluded that, in contrast to previous randomized trials of endovascular treatment for basilar artery occlusion, the ATTENTION trial was able to reinforce consecutive enrollment, resulting in a fast recruitment while minimizing crossovers. 

Furthermore, he pointed out that the overall results are consistent with modern era observational studies, large registries, and meta-analysis.

Commenting on the study, Joanna Wardlaw, MD, professor of applied neuroimaging at the University of Edinburgh (Scotland), and chair of the ESOC Planning Group, said: “This is a very important result, since it provides confirmation beyond doubt the benefit of thrombectomy versus medical therapy for basilar artery occlusion stroke up to 12 hours after onset.”

Dr. Wardlaw added: “The trial was large enough to provide clear results and to enable subgroup analyses; no subgroup did not benefit from thrombectomy.”

In a discussion after the presentation, Urs Fischer, MD, chair of the department of neurology at the University Hospital Basel, Switzerland, said he was not surprised by the results of the ATTENTION trial.

“We have been doing thrombectomy in patients with basilar artery occlusion now for 20 years, although trials are extremely important to answer these questions, so now we have some clear evidence,” Dr. Fischer said. “Nevertheless, there are some caveats, as this is an Asian population, but this is a proof of concept, and it is going in the right direction.”

The ATTENTION trial was sponsored by the First Affiliated Hospital of University of Science and Technology of China.

A version of this article first appeared on Medscape.com.

A new study finds clinicians are shifting away from the U.S. Food and Drug Administration–approved combination of warfarin and aspirin after left atrial appendage occlusion (LAAO) with the Watchman device and that adverse events, particularly bleeding, are lower when aspirin is dropped.

Of 31,994 patients successfully implanted with the Watchman 2.5 device in the 3 years after its March 2015 approval, only 1 in 10 received the full postprocedure protocol studied in pivotal trials and codified into the FDA-device approval.

The protocol consisted of aspirin (81-325 mg) indefinitely and warfarin for 45 days. Following transesophageal echocardiography, patients were then maintained on warfarin and aspirin if there was a peridevice leak greater than 5 mm or switched to clopidogrel 75 mg for 6 months if a peridevice leak was ruled out or was 5 mm or less.

Based on the results, drawn from the National Cardiovascular Data Registry (NCDR) LAAO Registry, the most common discharge medications were warfarin and aspirin in 36.9% of patients, followed by a direct oral anticoagulant (DOAC) and aspirin (20.8%), warfarin alone (13.5%), DOAC only (12.3%), and dual antiplatelet therapy (DAPT) with aspirin and a P2Y12 inhibitor (5%).

“There’s a little bit of practice leading the science in this space,” lead author James V. Freeman, MD, MPH, Yale School of Medicine, New Haven, Conn., told this news organization.

Patients who couldn’t tolerate long-term anticoagulation were excluded from the pivotal trials but are now the patients in whom the device is most often used, because of the Centers for Medicare & Medicaid reimbursement mandate for a relative or absolute contraindication to long-term anticoagulation, he noted.

Not surprisingly, 70% of patients in the registry had history of clinically relevant bleeding, the mean CHA2DS2-VASc score was 4.6, and mean HAS-BLED score was 3. At an average age of 76, they were also older, by years, than those in the clinical trials.

Secular trends at the time also saw the ascendancy of the DOACs relative to warfarin, observed Dr. Freeman. “So I think it’s pretty reasonable for physicians to be considering DOACs rather than warfarin in this context.”
 

Aspirin takes another hit

Results, published May 2 in the Journal of the American College of Cardiology, showed that any adverse event occurred at 45 days in 5.7% of patients discharged on warfarin and aspirin, 4% on warfarin alone, 5.2% on DOAC and aspirin, 3.8% on DOAC only, and 5.5% on DAPT.

Rates of any major adverse event were 4.4%, 3.3%, 4.3%, 3.1%, and 4.2% respectively, and for major bleeding were 3%, 1.8%, 2.8%, 1.7%, and 2.2% respectively. Although patients were similar across treatment groups, those treated with DAPT were slightly older and had more comorbidities, Dr. Freeman said.

In Cox frailty regression, the adjusted risk of any adverse event at 45 days was significantly lower when patients were discharged on warfarin alone (hazard ratio, 0.692; 95% confidence interval, 0.56-0.84) and a DOAC alone (HR, 0.731; 95% CI, 0.57-0.93), compared with warfarin and aspirin. There were no differences among the other groups.

The risk of any major adverse event was also significantly lower with warfarin alone (HR, 0.658; 95% CI, 0.53-0.80) and DOAC alone (HR, 0.767; 95% CI, 0.59-0.98).

At 6 months, rates of any adverse event (HR, 0.814; 95% CI, 0.72-0.93) and any major adverse event (HR, 0.840; 95% CI, 0.73-0.95) were significantly lower only in patients treated with warfarin alone.

“I think if there’s a take-home [message] here, it’s that for a lot of patients there’s good data now to suggest getting rid of the aspirin is a very reasonable thing to do,” Dr. Freeman said.

Further studies are needed in the space, but the results are consistent with those from transcatheter aortic valve replacement studies showing discharge on warfarin or DOAC anticoagulation alone reduces major adverse events without increasing thrombotic events, he said.

“I do think if there’s a strong indication for aspirin – someone has terrible coronary disease – there may be a role for using it,” Dr. Freeman said. But for a lot of these patients, anticoagulation alone without aspirin “may present a big opportunity to mitigate morbidity associated with this procedure.”

Dr. Freeman said he doesn’t expect the findings would be dramatically different with the second-generation Watchman FLX device but noted that randomized data will be forthcoming, as Boston Scientific changed the CHAMPION-AF trial protocol to include DOAC alone without aspirin.

Commenting for this news organization, Domenico Della Rocca, MD, Texas Cardiac Arrhythmia Institute at St. David’s Medical Center, Austin, said the study is a useful overview of post-LAAO therapies in a large population – but not surprising.

“Practice has changed over the years. More and more we are adopting and trusting the DOACs,” he said. “And, we are realizing that dual antiplatelet therapy is so aggressive and antiplatelet therapy alone maybe is not the best choice based on data on activation of coagulation.”

Commenting further, he said “I think it’s too early to suggest being too keen to completely drop aspirin,” noting that 20%-25% of patients have clopidogrel resistance and that the combination of two antiplatelets may be too aggressive a strategy for others.

Dr. Della Rocca and colleagues recently reported favorable long-term results with half-dose DOAC therapy after Watchman implantation and said the team is launching a randomized trial in more than 500 LAAO patients in the United States and Europe later this year. The trial will be comparing a DOAC-based strategy with low-dose apixaban long-term versus clopidogrel and aspirin initially and then switching to 100 mg aspirin long-term.

“We hope that in the next 2-3 years we will have some better answers, but at this point I would say that clopidogrel is kind of an obsolete strategy for appendage closure,” Dr. Della Rocca said.

In an accompanying editorial, David R. Holmes Jr., MD, Mayo Clinic, Rochester, Minn., says “the cornucopia of these specific strategies can be expected to change as practices evolve, as instructions for use broaden and, hopefully, with the results of well-done, scientifically performed trials. This current LAAO Registry report, however, serves as a useful benchmark.”

He cautioned that this is an observational cohort study and that unmeasured imbalances still may affect the ability to identify an unbiased treatment signal. The use of DAPT was also infrequent during the study and “conclusions based on this information are soft.”

The study was funded by the American College of Cardiology National Cardiovascular Data Registry (NCDR), and the National Heart, Lung, and Blood Institute (NHLBI) grants. Dr. Freeman has received salary support from the ACC NCDR and the NHLBI and has received consulting/advisory board fees from Boston Scientific, Medtronic, Janssen Pharmaceuticals, and Biosense Webster.

A version of this article first appeared on Medscape.com.

A new study finds clinicians are shifting away from the U.S. Food and Drug Administration–approved combination of warfarin and aspirin after left atrial appendage occlusion (LAAO) with the Watchman device and that adverse events, particularly bleeding, are lower when aspirin is dropped.

Of 31,994 patients successfully implanted with the Watchman 2.5 device in the 3 years after its March 2015 approval, only 1 in 10 received the full postprocedure protocol studied in pivotal trials and codified into the FDA-device approval.

The protocol consisted of aspirin (81-325 mg) indefinitely and warfarin for 45 days. Following transesophageal echocardiography, patients were then maintained on warfarin and aspirin if there was a peridevice leak greater than 5 mm or switched to clopidogrel 75 mg for 6 months if a peridevice leak was ruled out or was 5 mm or less.

Based on the results, drawn from the National Cardiovascular Data Registry (NCDR) LAAO Registry, the most common discharge medications were warfarin and aspirin in 36.9% of patients, followed by a direct oral anticoagulant (DOAC) and aspirin (20.8%), warfarin alone (13.5%), DOAC only (12.3%), and dual antiplatelet therapy (DAPT) with aspirin and a P2Y12 inhibitor (5%).

“There’s a little bit of practice leading the science in this space,” lead author James V. Freeman, MD, MPH, Yale School of Medicine, New Haven, Conn., told this news organization.

Patients who couldn’t tolerate long-term anticoagulation were excluded from the pivotal trials but are now the patients in whom the device is most often used, because of the Centers for Medicare & Medicaid reimbursement mandate for a relative or absolute contraindication to long-term anticoagulation, he noted.

Not surprisingly, 70% of patients in the registry had history of clinically relevant bleeding, the mean CHA2DS2-VASc score was 4.6, and mean HAS-BLED score was 3. At an average age of 76, they were also older, by years, than those in the clinical trials.

Secular trends at the time also saw the ascendancy of the DOACs relative to warfarin, observed Dr. Freeman. “So I think it’s pretty reasonable for physicians to be considering DOACs rather than warfarin in this context.”
 

Aspirin takes another hit

Results, published May 2 in the Journal of the American College of Cardiology, showed that any adverse event occurred at 45 days in 5.7% of patients discharged on warfarin and aspirin, 4% on warfarin alone, 5.2% on DOAC and aspirin, 3.8% on DOAC only, and 5.5% on DAPT.

Rates of any major adverse event were 4.4%, 3.3%, 4.3%, 3.1%, and 4.2% respectively, and for major bleeding were 3%, 1.8%, 2.8%, 1.7%, and 2.2% respectively. Although patients were similar across treatment groups, those treated with DAPT were slightly older and had more comorbidities, Dr. Freeman said.

In Cox frailty regression, the adjusted risk of any adverse event at 45 days was significantly lower when patients were discharged on warfarin alone (hazard ratio, 0.692; 95% confidence interval, 0.56-0.84) and a DOAC alone (HR, 0.731; 95% CI, 0.57-0.93), compared with warfarin and aspirin. There were no differences among the other groups.

The risk of any major adverse event was also significantly lower with warfarin alone (HR, 0.658; 95% CI, 0.53-0.80) and DOAC alone (HR, 0.767; 95% CI, 0.59-0.98).

At 6 months, rates of any adverse event (HR, 0.814; 95% CI, 0.72-0.93) and any major adverse event (HR, 0.840; 95% CI, 0.73-0.95) were significantly lower only in patients treated with warfarin alone.

“I think if there’s a take-home [message] here, it’s that for a lot of patients there’s good data now to suggest getting rid of the aspirin is a very reasonable thing to do,” Dr. Freeman said.

Further studies are needed in the space, but the results are consistent with those from transcatheter aortic valve replacement studies showing discharge on warfarin or DOAC anticoagulation alone reduces major adverse events without increasing thrombotic events, he said.

“I do think if there’s a strong indication for aspirin – someone has terrible coronary disease – there may be a role for using it,” Dr. Freeman said. But for a lot of these patients, anticoagulation alone without aspirin “may present a big opportunity to mitigate morbidity associated with this procedure.”

Dr. Freeman said he doesn’t expect the findings would be dramatically different with the second-generation Watchman FLX device but noted that randomized data will be forthcoming, as Boston Scientific changed the CHAMPION-AF trial protocol to include DOAC alone without aspirin.

Commenting for this news organization, Domenico Della Rocca, MD, Texas Cardiac Arrhythmia Institute at St. David’s Medical Center, Austin, said the study is a useful overview of post-LAAO therapies in a large population – but not surprising.

“Practice has changed over the years. More and more we are adopting and trusting the DOACs,” he said. “And, we are realizing that dual antiplatelet therapy is so aggressive and antiplatelet therapy alone maybe is not the best choice based on data on activation of coagulation.”

Commenting further, he said “I think it’s too early to suggest being too keen to completely drop aspirin,” noting that 20%-25% of patients have clopidogrel resistance and that the combination of two antiplatelets may be too aggressive a strategy for others.

Dr. Della Rocca and colleagues recently reported favorable long-term results with half-dose DOAC therapy after Watchman implantation and said the team is launching a randomized trial in more than 500 LAAO patients in the United States and Europe later this year. The trial will be comparing a DOAC-based strategy with low-dose apixaban long-term versus clopidogrel and aspirin initially and then switching to 100 mg aspirin long-term.

“We hope that in the next 2-3 years we will have some better answers, but at this point I would say that clopidogrel is kind of an obsolete strategy for appendage closure,” Dr. Della Rocca said.

In an accompanying editorial, David R. Holmes Jr., MD, Mayo Clinic, Rochester, Minn., says “the cornucopia of these specific strategies can be expected to change as practices evolve, as instructions for use broaden and, hopefully, with the results of well-done, scientifically performed trials. This current LAAO Registry report, however, serves as a useful benchmark.”

He cautioned that this is an observational cohort study and that unmeasured imbalances still may affect the ability to identify an unbiased treatment signal. The use of DAPT was also infrequent during the study and “conclusions based on this information are soft.”

The study was funded by the American College of Cardiology National Cardiovascular Data Registry (NCDR), and the National Heart, Lung, and Blood Institute (NHLBI) grants. Dr. Freeman has received salary support from the ACC NCDR and the NHLBI and has received consulting/advisory board fees from Boston Scientific, Medtronic, Janssen Pharmaceuticals, and Biosense Webster.

A version of this article first appeared on Medscape.com.

A new study finds clinicians are shifting away from the U.S. Food and Drug Administration–approved combination of warfarin and aspirin after left atrial appendage occlusion (LAAO) with the Watchman device and that adverse events, particularly bleeding, are lower when aspirin is dropped.

Of 31,994 patients successfully implanted with the Watchman 2.5 device in the 3 years after its March 2015 approval, only 1 in 10 received the full postprocedure protocol studied in pivotal trials and codified into the FDA-device approval.

The protocol consisted of aspirin (81-325 mg) indefinitely and warfarin for 45 days. Following transesophageal echocardiography, patients were then maintained on warfarin and aspirin if there was a peridevice leak greater than 5 mm or switched to clopidogrel 75 mg for 6 months if a peridevice leak was ruled out or was 5 mm or less.

Based on the results, drawn from the National Cardiovascular Data Registry (NCDR) LAAO Registry, the most common discharge medications were warfarin and aspirin in 36.9% of patients, followed by a direct oral anticoagulant (DOAC) and aspirin (20.8%), warfarin alone (13.5%), DOAC only (12.3%), and dual antiplatelet therapy (DAPT) with aspirin and a P2Y12 inhibitor (5%).

“There’s a little bit of practice leading the science in this space,” lead author James V. Freeman, MD, MPH, Yale School of Medicine, New Haven, Conn., told this news organization.

Patients who couldn’t tolerate long-term anticoagulation were excluded from the pivotal trials but are now the patients in whom the device is most often used, because of the Centers for Medicare & Medicaid reimbursement mandate for a relative or absolute contraindication to long-term anticoagulation, he noted.

Not surprisingly, 70% of patients in the registry had history of clinically relevant bleeding, the mean CHA2DS2-VASc score was 4.6, and mean HAS-BLED score was 3. At an average age of 76, they were also older, by years, than those in the clinical trials.

Secular trends at the time also saw the ascendancy of the DOACs relative to warfarin, observed Dr. Freeman. “So I think it’s pretty reasonable for physicians to be considering DOACs rather than warfarin in this context.”
 

Aspirin takes another hit

Results, published May 2 in the Journal of the American College of Cardiology, showed that any adverse event occurred at 45 days in 5.7% of patients discharged on warfarin and aspirin, 4% on warfarin alone, 5.2% on DOAC and aspirin, 3.8% on DOAC only, and 5.5% on DAPT.

Rates of any major adverse event were 4.4%, 3.3%, 4.3%, 3.1%, and 4.2% respectively, and for major bleeding were 3%, 1.8%, 2.8%, 1.7%, and 2.2% respectively. Although patients were similar across treatment groups, those treated with DAPT were slightly older and had more comorbidities, Dr. Freeman said.

In Cox frailty regression, the adjusted risk of any adverse event at 45 days was significantly lower when patients were discharged on warfarin alone (hazard ratio, 0.692; 95% confidence interval, 0.56-0.84) and a DOAC alone (HR, 0.731; 95% CI, 0.57-0.93), compared with warfarin and aspirin. There were no differences among the other groups.

The risk of any major adverse event was also significantly lower with warfarin alone (HR, 0.658; 95% CI, 0.53-0.80) and DOAC alone (HR, 0.767; 95% CI, 0.59-0.98).

At 6 months, rates of any adverse event (HR, 0.814; 95% CI, 0.72-0.93) and any major adverse event (HR, 0.840; 95% CI, 0.73-0.95) were significantly lower only in patients treated with warfarin alone.

“I think if there’s a take-home [message] here, it’s that for a lot of patients there’s good data now to suggest getting rid of the aspirin is a very reasonable thing to do,” Dr. Freeman said.

Further studies are needed in the space, but the results are consistent with those from transcatheter aortic valve replacement studies showing discharge on warfarin or DOAC anticoagulation alone reduces major adverse events without increasing thrombotic events, he said.

“I do think if there’s a strong indication for aspirin – someone has terrible coronary disease – there may be a role for using it,” Dr. Freeman said. But for a lot of these patients, anticoagulation alone without aspirin “may present a big opportunity to mitigate morbidity associated with this procedure.”

Dr. Freeman said he doesn’t expect the findings would be dramatically different with the second-generation Watchman FLX device but noted that randomized data will be forthcoming, as Boston Scientific changed the CHAMPION-AF trial protocol to include DOAC alone without aspirin.

Commenting for this news organization, Domenico Della Rocca, MD, Texas Cardiac Arrhythmia Institute at St. David’s Medical Center, Austin, said the study is a useful overview of post-LAAO therapies in a large population – but not surprising.

“Practice has changed over the years. More and more we are adopting and trusting the DOACs,” he said. “And, we are realizing that dual antiplatelet therapy is so aggressive and antiplatelet therapy alone maybe is not the best choice based on data on activation of coagulation.”

Commenting further, he said “I think it’s too early to suggest being too keen to completely drop aspirin,” noting that 20%-25% of patients have clopidogrel resistance and that the combination of two antiplatelets may be too aggressive a strategy for others.

Dr. Della Rocca and colleagues recently reported favorable long-term results with half-dose DOAC therapy after Watchman implantation and said the team is launching a randomized trial in more than 500 LAAO patients in the United States and Europe later this year. The trial will be comparing a DOAC-based strategy with low-dose apixaban long-term versus clopidogrel and aspirin initially and then switching to 100 mg aspirin long-term.

“We hope that in the next 2-3 years we will have some better answers, but at this point I would say that clopidogrel is kind of an obsolete strategy for appendage closure,” Dr. Della Rocca said.

In an accompanying editorial, David R. Holmes Jr., MD, Mayo Clinic, Rochester, Minn., says “the cornucopia of these specific strategies can be expected to change as practices evolve, as instructions for use broaden and, hopefully, with the results of well-done, scientifically performed trials. This current LAAO Registry report, however, serves as a useful benchmark.”

He cautioned that this is an observational cohort study and that unmeasured imbalances still may affect the ability to identify an unbiased treatment signal. The use of DAPT was also infrequent during the study and “conclusions based on this information are soft.”

The study was funded by the American College of Cardiology National Cardiovascular Data Registry (NCDR), and the National Heart, Lung, and Blood Institute (NHLBI) grants. Dr. Freeman has received salary support from the ACC NCDR and the NHLBI and has received consulting/advisory board fees from Boston Scientific, Medtronic, Janssen Pharmaceuticals, and Biosense Webster.

A version of this article first appeared on Medscape.com.

Having had a recent acute febrile illness was associated with an increased risk for ischemic stroke, whereas having received an influenza vaccination was associated with a reduced risk for stroke in a large new case-control study.

“While influenza vaccination is a cost-effective method to prevent influenza, it is also an effective way to reduce the burden of stroke,” said study author Christopher Schwarzbach, MD, of Ludwigshafen (Germany) Hospital.  

“Our results therefore encourage the wider use of influenza vaccination,” he concluded.

Dr. Schwarzbach presented these data from the INTERSTROKE study at the 2022 European Stroke Organisation Conference.

He explained that acute inflammatory disease is thought to increase the risk for cerebrovascular events, and the seasonality of influenza-like illness appears to be associated with the seasonality of cardiovascular and cerebrovascular events. Previous observational studies have also shown a link between influenza vaccination and a reduced risk for stroke.

The current INTERSTROKE study was a large international case-control study conducted between 2007 and 2015 that involved 13,447 cases (patients within 5 days of their first stroke) and a similar number of age- and gender-matched people from 32 countries across the world.

All cases and control subjects were systematically asked whether they had acute febrile illness in the previous 4 weeks and whether they had received an influenza vaccination within the previous year.

Conditional logistical regression was used to quantify the results, with adjustment for 13 different possible confounding factors, including hypertension, activity, smoking, cardiovascular risk factors, and socioeconomic factors.

Results showed that having had an acute febrile illness in the previous 4 weeks was more commonly reported in the patients with an acute ischemic stroke (8.7%) than in control patients (5.6%). After adjustment for confounding factors, this gives an adjusted risk ratio of 1.18, which was of borderline statistical significance (95% confidence limits, 1.01-1.39), Dr. Schwarzbach reported.

The association between recent febrile illness and acute ischemic stroke was stronger when compared with community control subjects (adjusted odds ratio, 2.0), but it was absent when compared with hospital control subjects.

The association was also only apparent in Australia, China, North America, and Western Europe; it was not seen in other parts of the world.

There was no association between acute febrile illness and acute cerebral hemorrhage.
 

Flu vaccine linked to halving of stroke risk

Having received a flu vaccine in the previous year was strongly associated with a lower risk for any type of stroke (aOR, 0.53), ischemic stroke (aOR, 0.57), and hemorrhagic stroke (aOR, 0.34).

Dr. Schwarzbach noted that these results were also consistent in an extended statistical model that included variables that might reflect a willingness to be vaccinated and when compared with both community and hospital-based control subjects.

The strength of the association between influenza vaccination and reduced risk for stroke was similar when compared with either community or hospital control subjects, and was only moderately stronger during than outside the influenza season.

The association was also seen in all regions of the world apart from Africa and South Asia, Dr. Schwarzbach reported, but he noted that vaccination rates in these two regions were extremely low.  

The researchers also found that the magnitude of the associations between flu vaccination and lower risk for stroke were stronger in individuals who had multiple annual vaccinations, with an odds ratio of 0.54 in those who had received a vaccine every year for the previous 5 years, and of 0.79 in those who had received one to four vaccinations in the previous 5 years.
 

Mechanism: Immune stimulation?

Discussing possible mechanisms behind these results, Dr. Schwarzbach noted that the finding that the association with influenza vaccination and reduced stroke risk was independent of seasonality was surprising. “We had expected the protective effect of vaccination to be bigger during the influenza season, but this wasn’t the case.”

He suggested that one explanation might be the inclusion of regions of the world where this seasonality doesn’t exist.

But he pointed out that the finding of a stronger association between flu vaccination and lower stroke risk in those who had received more vaccinations has given rise to another theory: that it is the stimulation of the immune system rather than the protection of infection against influenza that is the key factor.

In an interview with Dr. Schwarzbach, Guillaume Turk, MD, professor of neurology at GHU Paris, pointed out that causal inferences are always difficult in case-control studies and in clinical epidemiology in general.

“What makes you think that this association between influenza vaccination and decreased risk is causal rather than due to unmeasured confounders? For example, patients who received vaccination may have received more medical attention and may have been more aware of the risk factors for stroke,” he asked.  

Dr. Schwarzbach replied: “Yes, this is the issue of healthy user bias, which is always a problem in this type of research and is hard to address.”

“What we tried to do here is to adjust for variables that might influence the willingness of people to get vaccinated,” he added. “These were mainly socioeconomic factors. But, of course, this is something that we can’t rule out.”

Dr. Schwarzbach noted that, for more reliable information on this association, prospective studies are needed.
 

‘A plausible effect’

Discussing the study after the presentation, William Whiteley, BM, PhD, a clinical epidemiologist at the University of Edinburgh and a consultant neurologist in NHS Lothian, said vaccination was a potentially important way to reduce stroke.

“In this study, there was a plausible effect on reducing stroke incidence from vaccination against influenza, and also a plausible increase in the risk of stroke from having a recent febrile illness, which we have seen in other studies,” he commented.

Dr. Whiteley noted that this observation was particularly relevant now because of the COVID-19 pandemic.

“We’ve all been worried about the risk of heart attack and stroke after COVID, where we’ve seen quite early high risks, and we are also optimistic about the effect of vaccination on reducing those incidences. We’ve seen data from the U.K. that there may be around a 20% reduction in risk of stroke from vaccination. So, it’s all quite plausible, but at the moment it’s all based on observational evidence and we really need some randomized evidence,” he said.  

“Vaccination and infections have all sorts of odd confounders,” he added. “People who get vaccines tend to be more healthy than those who don’t get vaccines, so you can start to see quite implausible effects of vaccination on overall mortality, which probably aren’t real, and you probably can’t get rid of that totally with statistical methods.”

Alastair Webb, MD, University of Oxford (England), asked how reliable the current findings were, given that the occurrence of febrile illnesses and receipt of vaccines were all self-reported, and although there was an association for ischemic stroke and febrile illness, this seemed to go in the opposite direction for hemorrhagic stroke. He also noted that the 50% reduction in stroke risk with vaccination in this study seemed “quite a large magnitude of effect.”

Dr. Whiteley replied: “Yes, it is large, but it is promising.” He cited a previous meta-analysis of randomized studies that showed a roughly 25%-35% reduction in vascular events after flu vaccination, but noted that there was a lot of heterogeneity between studies.

“I’m not sure we’re going to see much more randomized evidence, but I think we can probably all agree that having a vaccine against flu or COVID is a good thing for all of us,” Dr. Whiteley concluded.

The INTERSTROKE study was funded by the Canadian Institutes of Health Research, Heart and Stroke Foundation of Canada, Canadian Stroke Network, Health Research Board Ireland, Swedish Research Council, Swedish Heart and Lung Foundation, The Health & Medical Care Committee of the Regional Executive Board, Region Vastra Gotaland (Sweden), AstraZeneca, Boehringer Ingelheim, Pfizer, MSD, Chest, Heart and Stroke Scotland, and The Stroke Association, with support from The UK Stroke Research Network. The authors reported no relevant disclosures.

A version of this article first appeared on Medscape.com.

Having had a recent acute febrile illness was associated with an increased risk for ischemic stroke, whereas having received an influenza vaccination was associated with a reduced risk for stroke in a large new case-control study.

“While influenza vaccination is a cost-effective method to prevent influenza, it is also an effective way to reduce the burden of stroke,” said study author Christopher Schwarzbach, MD, of Ludwigshafen (Germany) Hospital.  

“Our results therefore encourage the wider use of influenza vaccination,” he concluded.

Dr. Schwarzbach presented these data from the INTERSTROKE study at the 2022 European Stroke Organisation Conference.

He explained that acute inflammatory disease is thought to increase the risk for cerebrovascular events, and the seasonality of influenza-like illness appears to be associated with the seasonality of cardiovascular and cerebrovascular events. Previous observational studies have also shown a link between influenza vaccination and a reduced risk for stroke.

The current INTERSTROKE study was a large international case-control study conducted between 2007 and 2015 that involved 13,447 cases (patients within 5 days of their first stroke) and a similar number of age- and gender-matched people from 32 countries across the world.

All cases and control subjects were systematically asked whether they had acute febrile illness in the previous 4 weeks and whether they had received an influenza vaccination within the previous year.

Conditional logistical regression was used to quantify the results, with adjustment for 13 different possible confounding factors, including hypertension, activity, smoking, cardiovascular risk factors, and socioeconomic factors.

Results showed that having had an acute febrile illness in the previous 4 weeks was more commonly reported in the patients with an acute ischemic stroke (8.7%) than in control patients (5.6%). After adjustment for confounding factors, this gives an adjusted risk ratio of 1.18, which was of borderline statistical significance (95% confidence limits, 1.01-1.39), Dr. Schwarzbach reported.

The association between recent febrile illness and acute ischemic stroke was stronger when compared with community control subjects (adjusted odds ratio, 2.0), but it was absent when compared with hospital control subjects.

The association was also only apparent in Australia, China, North America, and Western Europe; it was not seen in other parts of the world.

There was no association between acute febrile illness and acute cerebral hemorrhage.
 

Flu vaccine linked to halving of stroke risk

Having received a flu vaccine in the previous year was strongly associated with a lower risk for any type of stroke (aOR, 0.53), ischemic stroke (aOR, 0.57), and hemorrhagic stroke (aOR, 0.34).

Dr. Schwarzbach noted that these results were also consistent in an extended statistical model that included variables that might reflect a willingness to be vaccinated and when compared with both community and hospital-based control subjects.

The strength of the association between influenza vaccination and reduced risk for stroke was similar when compared with either community or hospital control subjects, and was only moderately stronger during than outside the influenza season.

The association was also seen in all regions of the world apart from Africa and South Asia, Dr. Schwarzbach reported, but he noted that vaccination rates in these two regions were extremely low.  

The researchers also found that the magnitude of the associations between flu vaccination and lower risk for stroke were stronger in individuals who had multiple annual vaccinations, with an odds ratio of 0.54 in those who had received a vaccine every year for the previous 5 years, and of 0.79 in those who had received one to four vaccinations in the previous 5 years.
 

Mechanism: Immune stimulation?

Discussing possible mechanisms behind these results, Dr. Schwarzbach noted that the finding that the association with influenza vaccination and reduced stroke risk was independent of seasonality was surprising. “We had expected the protective effect of vaccination to be bigger during the influenza season, but this wasn’t the case.”

He suggested that one explanation might be the inclusion of regions of the world where this seasonality doesn’t exist.

But he pointed out that the finding of a stronger association between flu vaccination and lower stroke risk in those who had received more vaccinations has given rise to another theory: that it is the stimulation of the immune system rather than the protection of infection against influenza that is the key factor.

In an interview with Dr. Schwarzbach, Guillaume Turk, MD, professor of neurology at GHU Paris, pointed out that causal inferences are always difficult in case-control studies and in clinical epidemiology in general.

“What makes you think that this association between influenza vaccination and decreased risk is causal rather than due to unmeasured confounders? For example, patients who received vaccination may have received more medical attention and may have been more aware of the risk factors for stroke,” he asked.  

Dr. Schwarzbach replied: “Yes, this is the issue of healthy user bias, which is always a problem in this type of research and is hard to address.”

“What we tried to do here is to adjust for variables that might influence the willingness of people to get vaccinated,” he added. “These were mainly socioeconomic factors. But, of course, this is something that we can’t rule out.”

Dr. Schwarzbach noted that, for more reliable information on this association, prospective studies are needed.
 

‘A plausible effect’

Discussing the study after the presentation, William Whiteley, BM, PhD, a clinical epidemiologist at the University of Edinburgh and a consultant neurologist in NHS Lothian, said vaccination was a potentially important way to reduce stroke.

“In this study, there was a plausible effect on reducing stroke incidence from vaccination against influenza, and also a plausible increase in the risk of stroke from having a recent febrile illness, which we have seen in other studies,” he commented.

Dr. Whiteley noted that this observation was particularly relevant now because of the COVID-19 pandemic.

“We’ve all been worried about the risk of heart attack and stroke after COVID, where we’ve seen quite early high risks, and we are also optimistic about the effect of vaccination on reducing those incidences. We’ve seen data from the U.K. that there may be around a 20% reduction in risk of stroke from vaccination. So, it’s all quite plausible, but at the moment it’s all based on observational evidence and we really need some randomized evidence,” he said.  

“Vaccination and infections have all sorts of odd confounders,” he added. “People who get vaccines tend to be more healthy than those who don’t get vaccines, so you can start to see quite implausible effects of vaccination on overall mortality, which probably aren’t real, and you probably can’t get rid of that totally with statistical methods.”

Alastair Webb, MD, University of Oxford (England), asked how reliable the current findings were, given that the occurrence of febrile illnesses and receipt of vaccines were all self-reported, and although there was an association for ischemic stroke and febrile illness, this seemed to go in the opposite direction for hemorrhagic stroke. He also noted that the 50% reduction in stroke risk with vaccination in this study seemed “quite a large magnitude of effect.”

Dr. Whiteley replied: “Yes, it is large, but it is promising.” He cited a previous meta-analysis of randomized studies that showed a roughly 25%-35% reduction in vascular events after flu vaccination, but noted that there was a lot of heterogeneity between studies.

“I’m not sure we’re going to see much more randomized evidence, but I think we can probably all agree that having a vaccine against flu or COVID is a good thing for all of us,” Dr. Whiteley concluded.

The INTERSTROKE study was funded by the Canadian Institutes of Health Research, Heart and Stroke Foundation of Canada, Canadian Stroke Network, Health Research Board Ireland, Swedish Research Council, Swedish Heart and Lung Foundation, The Health & Medical Care Committee of the Regional Executive Board, Region Vastra Gotaland (Sweden), AstraZeneca, Boehringer Ingelheim, Pfizer, MSD, Chest, Heart and Stroke Scotland, and The Stroke Association, with support from The UK Stroke Research Network. The authors reported no relevant disclosures.

A version of this article first appeared on Medscape.com.

Having had a recent acute febrile illness was associated with an increased risk for ischemic stroke, whereas having received an influenza vaccination was associated with a reduced risk for stroke in a large new case-control study.

“While influenza vaccination is a cost-effective method to prevent influenza, it is also an effective way to reduce the burden of stroke,” said study author Christopher Schwarzbach, MD, of Ludwigshafen (Germany) Hospital.  

“Our results therefore encourage the wider use of influenza vaccination,” he concluded.

Dr. Schwarzbach presented these data from the INTERSTROKE study at the 2022 European Stroke Organisation Conference.

He explained that acute inflammatory disease is thought to increase the risk for cerebrovascular events, and the seasonality of influenza-like illness appears to be associated with the seasonality of cardiovascular and cerebrovascular events. Previous observational studies have also shown a link between influenza vaccination and a reduced risk for stroke.

The current INTERSTROKE study was a large international case-control study conducted between 2007 and 2015 that involved 13,447 cases (patients within 5 days of their first stroke) and a similar number of age- and gender-matched people from 32 countries across the world.

All cases and control subjects were systematically asked whether they had acute febrile illness in the previous 4 weeks and whether they had received an influenza vaccination within the previous year.

Conditional logistical regression was used to quantify the results, with adjustment for 13 different possible confounding factors, including hypertension, activity, smoking, cardiovascular risk factors, and socioeconomic factors.

Results showed that having had an acute febrile illness in the previous 4 weeks was more commonly reported in the patients with an acute ischemic stroke (8.7%) than in control patients (5.6%). After adjustment for confounding factors, this gives an adjusted risk ratio of 1.18, which was of borderline statistical significance (95% confidence limits, 1.01-1.39), Dr. Schwarzbach reported.

The association between recent febrile illness and acute ischemic stroke was stronger when compared with community control subjects (adjusted odds ratio, 2.0), but it was absent when compared with hospital control subjects.

The association was also only apparent in Australia, China, North America, and Western Europe; it was not seen in other parts of the world.

There was no association between acute febrile illness and acute cerebral hemorrhage.
 

Flu vaccine linked to halving of stroke risk

Having received a flu vaccine in the previous year was strongly associated with a lower risk for any type of stroke (aOR, 0.53), ischemic stroke (aOR, 0.57), and hemorrhagic stroke (aOR, 0.34).

Dr. Schwarzbach noted that these results were also consistent in an extended statistical model that included variables that might reflect a willingness to be vaccinated and when compared with both community and hospital-based control subjects.

The strength of the association between influenza vaccination and reduced risk for stroke was similar when compared with either community or hospital control subjects, and was only moderately stronger during than outside the influenza season.

The association was also seen in all regions of the world apart from Africa and South Asia, Dr. Schwarzbach reported, but he noted that vaccination rates in these two regions were extremely low.  

The researchers also found that the magnitude of the associations between flu vaccination and lower risk for stroke were stronger in individuals who had multiple annual vaccinations, with an odds ratio of 0.54 in those who had received a vaccine every year for the previous 5 years, and of 0.79 in those who had received one to four vaccinations in the previous 5 years.
 

Mechanism: Immune stimulation?

Discussing possible mechanisms behind these results, Dr. Schwarzbach noted that the finding that the association with influenza vaccination and reduced stroke risk was independent of seasonality was surprising. “We had expected the protective effect of vaccination to be bigger during the influenza season, but this wasn’t the case.”

He suggested that one explanation might be the inclusion of regions of the world where this seasonality doesn’t exist.

But he pointed out that the finding of a stronger association between flu vaccination and lower stroke risk in those who had received more vaccinations has given rise to another theory: that it is the stimulation of the immune system rather than the protection of infection against influenza that is the key factor.

In an interview with Dr. Schwarzbach, Guillaume Turk, MD, professor of neurology at GHU Paris, pointed out that causal inferences are always difficult in case-control studies and in clinical epidemiology in general.

“What makes you think that this association between influenza vaccination and decreased risk is causal rather than due to unmeasured confounders? For example, patients who received vaccination may have received more medical attention and may have been more aware of the risk factors for stroke,” he asked.  

Dr. Schwarzbach replied: “Yes, this is the issue of healthy user bias, which is always a problem in this type of research and is hard to address.”

“What we tried to do here is to adjust for variables that might influence the willingness of people to get vaccinated,” he added. “These were mainly socioeconomic factors. But, of course, this is something that we can’t rule out.”

Dr. Schwarzbach noted that, for more reliable information on this association, prospective studies are needed.
 

‘A plausible effect’

Discussing the study after the presentation, William Whiteley, BM, PhD, a clinical epidemiologist at the University of Edinburgh and a consultant neurologist in NHS Lothian, said vaccination was a potentially important way to reduce stroke.

“In this study, there was a plausible effect on reducing stroke incidence from vaccination against influenza, and also a plausible increase in the risk of stroke from having a recent febrile illness, which we have seen in other studies,” he commented.

Dr. Whiteley noted that this observation was particularly relevant now because of the COVID-19 pandemic.

“We’ve all been worried about the risk of heart attack and stroke after COVID, where we’ve seen quite early high risks, and we are also optimistic about the effect of vaccination on reducing those incidences. We’ve seen data from the U.K. that there may be around a 20% reduction in risk of stroke from vaccination. So, it’s all quite plausible, but at the moment it’s all based on observational evidence and we really need some randomized evidence,” he said.  

“Vaccination and infections have all sorts of odd confounders,” he added. “People who get vaccines tend to be more healthy than those who don’t get vaccines, so you can start to see quite implausible effects of vaccination on overall mortality, which probably aren’t real, and you probably can’t get rid of that totally with statistical methods.”

Alastair Webb, MD, University of Oxford (England), asked how reliable the current findings were, given that the occurrence of febrile illnesses and receipt of vaccines were all self-reported, and although there was an association for ischemic stroke and febrile illness, this seemed to go in the opposite direction for hemorrhagic stroke. He also noted that the 50% reduction in stroke risk with vaccination in this study seemed “quite a large magnitude of effect.”

Dr. Whiteley replied: “Yes, it is large, but it is promising.” He cited a previous meta-analysis of randomized studies that showed a roughly 25%-35% reduction in vascular events after flu vaccination, but noted that there was a lot of heterogeneity between studies.

“I’m not sure we’re going to see much more randomized evidence, but I think we can probably all agree that having a vaccine against flu or COVID is a good thing for all of us,” Dr. Whiteley concluded.

The INTERSTROKE study was funded by the Canadian Institutes of Health Research, Heart and Stroke Foundation of Canada, Canadian Stroke Network, Health Research Board Ireland, Swedish Research Council, Swedish Heart and Lung Foundation, The Health & Medical Care Committee of the Regional Executive Board, Region Vastra Gotaland (Sweden), AstraZeneca, Boehringer Ingelheim, Pfizer, MSD, Chest, Heart and Stroke Scotland, and The Stroke Association, with support from The UK Stroke Research Network. The authors reported no relevant disclosures.

A version of this article first appeared on Medscape.com.

Mild traumatic brain injury (TBI) is linked to a significantly increased risk for a host of subsequent cardiovascular, endocrine, neurologic, and psychiatric disorders, new research shows.

Incidence of hypertension, coronary heart disease, diabetes, stroke, depression, and dementia all began to increase soon after the brain injury and persisted over a decade in both mild and moderate to severe TBI.

Researchers found the multisystem comorbidities in all age groups, including in patients as young as 18. They also found that patients who developed multiple postinjury problems had higher mortality during the decade-long follow-up.

The findings suggest patients with TBI may require longer follow-up and proactive screening for multisystem disease, regardless of age or injury severity.

“The fact that both patients with mild and moderate to severe injuries both had long-term ongoing associations with comorbidities that continued over time and that they are cardiovascular, endocrine, neurologic, and behavioral health oriented was pretty striking,” study author Ross Zafonte, DO, PhD, president of Spaulding Rehab Hospital and professor and chair of physical medicine and rehab at Harvard Medical School, both in Boston, told this news organization.

The study was published online in JAMA Network Open.
 

Injury severity not a factor

An estimated 2.8 million individuals in the United States experience TBI every year. Worldwide, the figure may be as high as 74 million.

Studies have long suggested a link between brain injury and subsequent neurologic disorders, but research suggesting a possible link to cardiovascular and endocrine problems has recently gained attention.

Building on a 2021 study that showed increased incidence of cardiovascular issues following a concussion, the researchers examined medical records of previously healthy patients treated for TBI between 2000 and 2015 who also had at least 1 follow-up visit between 6 months and 10 years after the initial injury.

Researchers analyzed data from 13,053 individuals – 4,351 with mild injury (mTBI), 4351 with moderate to severe injury (msTBI), and 4351 with no TBI. The most common cause of injury was a fall. Patients with sports-related injuries were excluded.

Incidence of hypertension was significantly higher among patients with mTBI (hazard ratio, 2.5; 95% confidence interval, 2.1-2.9) and msTBI (HR, 2.4; 95% CI, 2.0-2.9), compared with the unaffected group. Risk for other cardiovascular problems, including hyperlipidemia, obesity, and coronary artery disease, were also higher in the affected groups.

TBI patients also reported higher incidence of endocrine diseases, including diabetes (mTBI: HR, 1.9; 95% CI, 1.4-2.7; msTBI: HR, 1.9; 95% CI, 1.4-2.6). Elevated risk for ischemic stroke or transient ischemic attack was also increased (mTBI: HR, 2.2; 95% CI, 1.4-3.3; msTBI: HR, 3.6; 95% CI, 2.4-5.3).

Regardless of injury severity, patients with TBI had a higher risk for neurologic and psychiatric diseases, particularly depression, dementia, and psychotic disorders. “This tells us that mild TBI is not clean of events,” Dr. Zafonte said.

Surprising rate of comorbidity in youth

Investigators found increased risk for posttrauma comorbidities in all age groups, but researchers were struck by the high rates in younger patients, aged 18-40. Compared with age-matched individuals with no TBI history, hypertension risk was nearly six times higher in those with mTBI (HR, 5.9; 95% CI, 3.9-9.1) and nearly four times higher in patients with msTBI (HR, 3.9; 95% CI, 2.5-6.1).

Rates of hyperlipidemia and diabetes were also higher in younger patients in the mTBI group and posttraumatic seizures and psychiatric disorders were elevated regardless of TBI severity.

Overall, patients with msTBI, but not those with mTBI, were at higher risk for mortality, compared with the unexposed group (432 deaths [9.9%] vs. 250 deaths [5.7%]; P < .001).

“It’s clear that what we may be dealing with is that it holds up even for the younger people,” Dr. Zafonte said. “We used to think brain injury risk is worse in the severe cases, which it is, and it’s worse later on among those who are older, which it is. But our younger folks don’t get away either.”

While the study offers associations between TBI and multisystem health problems, Dr. Zafonte said it’s impossible to say at this point whether the brain injury caused the increased risk for cardiovascular or endocrine problems. Other organ injuries sustained in the trauma may be a contributing factor.

“Further data is needed to elucidate the mechanism and the causative relationships, which we do not have here,” he said.

Many of the postinjury comorbidities emerged a median of 3.5 years after TBI, regardless of severity. But some of the cardiovascular and psychiatric conditions emerged far sooner than that.

That’s important because research suggests less than half of patients with TBI receive follow-up care.

“It does make sense for folks who are interacting with people who’ve had a TBI to be suspicious of medical comorbidities relatively early on, within the first couple of years,” Dr. Zafonte said.

In an invited commentary, Vijay Krishnamoorthy, MD, MPH, PhD, Duke University, Durham, N.C., and Monica S. Vavilala, MD, University of Washington, Seattle, highlight some of the study’s limitations, including a lack of information on comorbidity severity and the lack of a matched group of patients who experienced non-head trauma.

Despite those limitations, the study offers important information on how TBI may affect organs beyond the brain, they noted.

“These observations, if replicated in future studies, raise intriguing implications in the future care of patients with TBI, including heightened chronic disease-screening measures and possibly enhanced guidelines for chronic extracranial organ system care for patients who experience TBI,” Dr. Krishnamoorthy and Dr. Vavilala wrote.

The study received no specific funding. Dr. Zafonte reported having received personal fees from Springer/Demos, serving on scientific advisory boards for Myomo and OnCare and has received funding from the Football Players Health Study at Harvard, funded in part by the National Football League Players Association. Dr. Krishnamoorthy and Dr. Vavilala disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Mild traumatic brain injury (TBI) is linked to a significantly increased risk for a host of subsequent cardiovascular, endocrine, neurologic, and psychiatric disorders, new research shows.

Incidence of hypertension, coronary heart disease, diabetes, stroke, depression, and dementia all began to increase soon after the brain injury and persisted over a decade in both mild and moderate to severe TBI.

Researchers found the multisystem comorbidities in all age groups, including in patients as young as 18. They also found that patients who developed multiple postinjury problems had higher mortality during the decade-long follow-up.

The findings suggest patients with TBI may require longer follow-up and proactive screening for multisystem disease, regardless of age or injury severity.

“The fact that both patients with mild and moderate to severe injuries both had long-term ongoing associations with comorbidities that continued over time and that they are cardiovascular, endocrine, neurologic, and behavioral health oriented was pretty striking,” study author Ross Zafonte, DO, PhD, president of Spaulding Rehab Hospital and professor and chair of physical medicine and rehab at Harvard Medical School, both in Boston, told this news organization.

The study was published online in JAMA Network Open.
 

Injury severity not a factor

An estimated 2.8 million individuals in the United States experience TBI every year. Worldwide, the figure may be as high as 74 million.

Studies have long suggested a link between brain injury and subsequent neurologic disorders, but research suggesting a possible link to cardiovascular and endocrine problems has recently gained attention.

Building on a 2021 study that showed increased incidence of cardiovascular issues following a concussion, the researchers examined medical records of previously healthy patients treated for TBI between 2000 and 2015 who also had at least 1 follow-up visit between 6 months and 10 years after the initial injury.

Researchers analyzed data from 13,053 individuals – 4,351 with mild injury (mTBI), 4351 with moderate to severe injury (msTBI), and 4351 with no TBI. The most common cause of injury was a fall. Patients with sports-related injuries were excluded.

Incidence of hypertension was significantly higher among patients with mTBI (hazard ratio, 2.5; 95% confidence interval, 2.1-2.9) and msTBI (HR, 2.4; 95% CI, 2.0-2.9), compared with the unaffected group. Risk for other cardiovascular problems, including hyperlipidemia, obesity, and coronary artery disease, were also higher in the affected groups.

TBI patients also reported higher incidence of endocrine diseases, including diabetes (mTBI: HR, 1.9; 95% CI, 1.4-2.7; msTBI: HR, 1.9; 95% CI, 1.4-2.6). Elevated risk for ischemic stroke or transient ischemic attack was also increased (mTBI: HR, 2.2; 95% CI, 1.4-3.3; msTBI: HR, 3.6; 95% CI, 2.4-5.3).

Regardless of injury severity, patients with TBI had a higher risk for neurologic and psychiatric diseases, particularly depression, dementia, and psychotic disorders. “This tells us that mild TBI is not clean of events,” Dr. Zafonte said.

Surprising rate of comorbidity in youth

Investigators found increased risk for posttrauma comorbidities in all age groups, but researchers were struck by the high rates in younger patients, aged 18-40. Compared with age-matched individuals with no TBI history, hypertension risk was nearly six times higher in those with mTBI (HR, 5.9; 95% CI, 3.9-9.1) and nearly four times higher in patients with msTBI (HR, 3.9; 95% CI, 2.5-6.1).

Rates of hyperlipidemia and diabetes were also higher in younger patients in the mTBI group and posttraumatic seizures and psychiatric disorders were elevated regardless of TBI severity.

Overall, patients with msTBI, but not those with mTBI, were at higher risk for mortality, compared with the unexposed group (432 deaths [9.9%] vs. 250 deaths [5.7%]; P < .001).

“It’s clear that what we may be dealing with is that it holds up even for the younger people,” Dr. Zafonte said. “We used to think brain injury risk is worse in the severe cases, which it is, and it’s worse later on among those who are older, which it is. But our younger folks don’t get away either.”

While the study offers associations between TBI and multisystem health problems, Dr. Zafonte said it’s impossible to say at this point whether the brain injury caused the increased risk for cardiovascular or endocrine problems. Other organ injuries sustained in the trauma may be a contributing factor.

“Further data is needed to elucidate the mechanism and the causative relationships, which we do not have here,” he said.

Many of the postinjury comorbidities emerged a median of 3.5 years after TBI, regardless of severity. But some of the cardiovascular and psychiatric conditions emerged far sooner than that.

That’s important because research suggests less than half of patients with TBI receive follow-up care.

“It does make sense for folks who are interacting with people who’ve had a TBI to be suspicious of medical comorbidities relatively early on, within the first couple of years,” Dr. Zafonte said.

In an invited commentary, Vijay Krishnamoorthy, MD, MPH, PhD, Duke University, Durham, N.C., and Monica S. Vavilala, MD, University of Washington, Seattle, highlight some of the study’s limitations, including a lack of information on comorbidity severity and the lack of a matched group of patients who experienced non-head trauma.

Despite those limitations, the study offers important information on how TBI may affect organs beyond the brain, they noted.

“These observations, if replicated in future studies, raise intriguing implications in the future care of patients with TBI, including heightened chronic disease-screening measures and possibly enhanced guidelines for chronic extracranial organ system care for patients who experience TBI,” Dr. Krishnamoorthy and Dr. Vavilala wrote.

The study received no specific funding. Dr. Zafonte reported having received personal fees from Springer/Demos, serving on scientific advisory boards for Myomo and OnCare and has received funding from the Football Players Health Study at Harvard, funded in part by the National Football League Players Association. Dr. Krishnamoorthy and Dr. Vavilala disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Mild traumatic brain injury (TBI) is linked to a significantly increased risk for a host of subsequent cardiovascular, endocrine, neurologic, and psychiatric disorders, new research shows.

Incidence of hypertension, coronary heart disease, diabetes, stroke, depression, and dementia all began to increase soon after the brain injury and persisted over a decade in both mild and moderate to severe TBI.

Researchers found the multisystem comorbidities in all age groups, including in patients as young as 18. They also found that patients who developed multiple postinjury problems had higher mortality during the decade-long follow-up.

The findings suggest patients with TBI may require longer follow-up and proactive screening for multisystem disease, regardless of age or injury severity.

“The fact that both patients with mild and moderate to severe injuries both had long-term ongoing associations with comorbidities that continued over time and that they are cardiovascular, endocrine, neurologic, and behavioral health oriented was pretty striking,” study author Ross Zafonte, DO, PhD, president of Spaulding Rehab Hospital and professor and chair of physical medicine and rehab at Harvard Medical School, both in Boston, told this news organization.

The study was published online in JAMA Network Open.
 

Injury severity not a factor

An estimated 2.8 million individuals in the United States experience TBI every year. Worldwide, the figure may be as high as 74 million.

Studies have long suggested a link between brain injury and subsequent neurologic disorders, but research suggesting a possible link to cardiovascular and endocrine problems has recently gained attention.

Building on a 2021 study that showed increased incidence of cardiovascular issues following a concussion, the researchers examined medical records of previously healthy patients treated for TBI between 2000 and 2015 who also had at least 1 follow-up visit between 6 months and 10 years after the initial injury.

Researchers analyzed data from 13,053 individuals – 4,351 with mild injury (mTBI), 4351 with moderate to severe injury (msTBI), and 4351 with no TBI. The most common cause of injury was a fall. Patients with sports-related injuries were excluded.

Incidence of hypertension was significantly higher among patients with mTBI (hazard ratio, 2.5; 95% confidence interval, 2.1-2.9) and msTBI (HR, 2.4; 95% CI, 2.0-2.9), compared with the unaffected group. Risk for other cardiovascular problems, including hyperlipidemia, obesity, and coronary artery disease, were also higher in the affected groups.

TBI patients also reported higher incidence of endocrine diseases, including diabetes (mTBI: HR, 1.9; 95% CI, 1.4-2.7; msTBI: HR, 1.9; 95% CI, 1.4-2.6). Elevated risk for ischemic stroke or transient ischemic attack was also increased (mTBI: HR, 2.2; 95% CI, 1.4-3.3; msTBI: HR, 3.6; 95% CI, 2.4-5.3).

Regardless of injury severity, patients with TBI had a higher risk for neurologic and psychiatric diseases, particularly depression, dementia, and psychotic disorders. “This tells us that mild TBI is not clean of events,” Dr. Zafonte said.

Surprising rate of comorbidity in youth

Investigators found increased risk for posttrauma comorbidities in all age groups, but researchers were struck by the high rates in younger patients, aged 18-40. Compared with age-matched individuals with no TBI history, hypertension risk was nearly six times higher in those with mTBI (HR, 5.9; 95% CI, 3.9-9.1) and nearly four times higher in patients with msTBI (HR, 3.9; 95% CI, 2.5-6.1).

Rates of hyperlipidemia and diabetes were also higher in younger patients in the mTBI group and posttraumatic seizures and psychiatric disorders were elevated regardless of TBI severity.

Overall, patients with msTBI, but not those with mTBI, were at higher risk for mortality, compared with the unexposed group (432 deaths [9.9%] vs. 250 deaths [5.7%]; P < .001).

“It’s clear that what we may be dealing with is that it holds up even for the younger people,” Dr. Zafonte said. “We used to think brain injury risk is worse in the severe cases, which it is, and it’s worse later on among those who are older, which it is. But our younger folks don’t get away either.”

While the study offers associations between TBI and multisystem health problems, Dr. Zafonte said it’s impossible to say at this point whether the brain injury caused the increased risk for cardiovascular or endocrine problems. Other organ injuries sustained in the trauma may be a contributing factor.

“Further data is needed to elucidate the mechanism and the causative relationships, which we do not have here,” he said.

Many of the postinjury comorbidities emerged a median of 3.5 years after TBI, regardless of severity. But some of the cardiovascular and psychiatric conditions emerged far sooner than that.

That’s important because research suggests less than half of patients with TBI receive follow-up care.

“It does make sense for folks who are interacting with people who’ve had a TBI to be suspicious of medical comorbidities relatively early on, within the first couple of years,” Dr. Zafonte said.

In an invited commentary, Vijay Krishnamoorthy, MD, MPH, PhD, Duke University, Durham, N.C., and Monica S. Vavilala, MD, University of Washington, Seattle, highlight some of the study’s limitations, including a lack of information on comorbidity severity and the lack of a matched group of patients who experienced non-head trauma.

Despite those limitations, the study offers important information on how TBI may affect organs beyond the brain, they noted.

“These observations, if replicated in future studies, raise intriguing implications in the future care of patients with TBI, including heightened chronic disease-screening measures and possibly enhanced guidelines for chronic extracranial organ system care for patients who experience TBI,” Dr. Krishnamoorthy and Dr. Vavilala wrote.

The study received no specific funding. Dr. Zafonte reported having received personal fees from Springer/Demos, serving on scientific advisory boards for Myomo and OnCare and has received funding from the Football Players Health Study at Harvard, funded in part by the National Football League Players Association. Dr. Krishnamoorthy and Dr. Vavilala disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Women with systemic lupus erythematosus (SLE) experience worse outcomes after an acute stroke than does the general population, but men with SLE do not, according to an analysis of the U.S. National Inpatient Sample presented at the annual meeting of the British Society for Rheumatology.

In a study of more than 1.5 million cases of acute stroke recorded in the United States between 2015 and 2018, women with SLE were more likely to be hospitalized for longer and less likely to be routinely discharged into their home environment than were those without SLE. No such association was found for men with SLE.

“The findings imply that primary stroke prevention is of utmost importance, especially in females with SLE,” said Sona Jesenakova, a fourth-year medical student at the University of Aberdeen (Scotland).

“There might be a need to explore more effective and targeted treatment strategies to try and minimize these excessive adverse acute stroke outcomes, especially in females with SLE suffering from stroke,” she suggested.

“Even though males form only a minority of the SLE patient population, some studies have shown that they are prone to suffer from worse disease outcomes,” Ms. Jesenakova said.

Importantly, “male sex has been identified as a risk factor for death early in the course of SLE,” she added, highlighting that sex differences do seem to exist in SLE.

Stroke is an important outcome to look at because people with SLE are known to be at higher risk for developing atherosclerosis, which is a widely known risk factor for ischemic stroke, and with antiphospholipid antibody positivity and uncontrolled disease activity, that risk can be increased. A meta-analysis of older studies has suggested that the risk for death after a stroke is 68% higher in people with SLE than in those without.

To examine the risk for death and other in-hospital outcomes in a more contemporary population, Ms. Jesenakova and associates used data from the National Inpatient Sample, a large, publicly available database that contains inpatient health care information from across the United States. Their sample population consisted of 1,581,430 individuals who had been hospitalized for stroke. Of these, there were 6,100 women and 940 men who had SLE; the remainder served as the ‘no-SLE’ control population.

As might be expected, patients with SLE were about 10 years younger than those without SLE; the median age of women and men with SLE and those without SLE were a respective 60, 61, and 71 years.

There was no difference in the type of stroke between the SLE and no-SLE groups; most had an ischemic stroke (around 89%) rather than a hemorrhagic stroke (around 11%).

The researchers analyzed three key outcomes: mortality at discharge, hospitalization prolonged to a stay of more than 4 days, and routine home discharge, meaning that the patient was able to be discharged home versus more specialist facilities such as a nursing home.

They conducted a multivariate analysis with adjustments made for potential confounding factors such as age, ethnicity, type of stroke, and revascularization treatment. Comorbidities, including major cardiovascular disease, were also accounted for.

Although women with SLE were 21% more likely to die than patients without SLE, men with SLE were 24% less likely to die than was the no-SLE population. However, these differences were not statistically significant.

Women with SLE were 20% more likely to have a prolonged hospital stay and 28% less likely to have a routine home discharge, compared with patients who did not have SLE. The 95% confidence intervals were statistically significant, which was not seen when comparing the same outcomes in men with SLE (odds ratios of 1.06 and 1.18, respectively).

“As for males, even though we didn’t find anything of statistical significance, we have to bear in mind that the sample we had was quite small, and thus these results need to be interpreted with caution,” Ms. Jesenakova said. “We also think that we identified a gap in the current knowledge, and as such, further research is needed to help us understand the influence of male sex on acute stroke outcomes in patients with comorbid SLE.”

The researchers performed a secondary analysis looking at the use of revascularization treatments for ischemic stroke and found that there were no differences between individuals with and without SLE. This analysis considered the use of intravenous thrombolysis and endovascular thrombectomy in just over 1.4 million cases but did not look at sex-specific differences.

Ms. Jesenakova had no conflicts of interest to disclose.

Women with systemic lupus erythematosus (SLE) experience worse outcomes after an acute stroke than does the general population, but men with SLE do not, according to an analysis of the U.S. National Inpatient Sample presented at the annual meeting of the British Society for Rheumatology.

In a study of more than 1.5 million cases of acute stroke recorded in the United States between 2015 and 2018, women with SLE were more likely to be hospitalized for longer and less likely to be routinely discharged into their home environment than were those without SLE. No such association was found for men with SLE.

“The findings imply that primary stroke prevention is of utmost importance, especially in females with SLE,” said Sona Jesenakova, a fourth-year medical student at the University of Aberdeen (Scotland).

“There might be a need to explore more effective and targeted treatment strategies to try and minimize these excessive adverse acute stroke outcomes, especially in females with SLE suffering from stroke,” she suggested.

“Even though males form only a minority of the SLE patient population, some studies have shown that they are prone to suffer from worse disease outcomes,” Ms. Jesenakova said.

Importantly, “male sex has been identified as a risk factor for death early in the course of SLE,” she added, highlighting that sex differences do seem to exist in SLE.

Stroke is an important outcome to look at because people with SLE are known to be at higher risk for developing atherosclerosis, which is a widely known risk factor for ischemic stroke, and with antiphospholipid antibody positivity and uncontrolled disease activity, that risk can be increased. A meta-analysis of older studies has suggested that the risk for death after a stroke is 68% higher in people with SLE than in those without.

To examine the risk for death and other in-hospital outcomes in a more contemporary population, Ms. Jesenakova and associates used data from the National Inpatient Sample, a large, publicly available database that contains inpatient health care information from across the United States. Their sample population consisted of 1,581,430 individuals who had been hospitalized for stroke. Of these, there were 6,100 women and 940 men who had SLE; the remainder served as the ‘no-SLE’ control population.

As might be expected, patients with SLE were about 10 years younger than those without SLE; the median age of women and men with SLE and those without SLE were a respective 60, 61, and 71 years.

There was no difference in the type of stroke between the SLE and no-SLE groups; most had an ischemic stroke (around 89%) rather than a hemorrhagic stroke (around 11%).

The researchers analyzed three key outcomes: mortality at discharge, hospitalization prolonged to a stay of more than 4 days, and routine home discharge, meaning that the patient was able to be discharged home versus more specialist facilities such as a nursing home.

They conducted a multivariate analysis with adjustments made for potential confounding factors such as age, ethnicity, type of stroke, and revascularization treatment. Comorbidities, including major cardiovascular disease, were also accounted for.

Although women with SLE were 21% more likely to die than patients without SLE, men with SLE were 24% less likely to die than was the no-SLE population. However, these differences were not statistically significant.

Women with SLE were 20% more likely to have a prolonged hospital stay and 28% less likely to have a routine home discharge, compared with patients who did not have SLE. The 95% confidence intervals were statistically significant, which was not seen when comparing the same outcomes in men with SLE (odds ratios of 1.06 and 1.18, respectively).

“As for males, even though we didn’t find anything of statistical significance, we have to bear in mind that the sample we had was quite small, and thus these results need to be interpreted with caution,” Ms. Jesenakova said. “We also think that we identified a gap in the current knowledge, and as such, further research is needed to help us understand the influence of male sex on acute stroke outcomes in patients with comorbid SLE.”

The researchers performed a secondary analysis looking at the use of revascularization treatments for ischemic stroke and found that there were no differences between individuals with and without SLE. This analysis considered the use of intravenous thrombolysis and endovascular thrombectomy in just over 1.4 million cases but did not look at sex-specific differences.

Ms. Jesenakova had no conflicts of interest to disclose.

Women with systemic lupus erythematosus (SLE) experience worse outcomes after an acute stroke than does the general population, but men with SLE do not, according to an analysis of the U.S. National Inpatient Sample presented at the annual meeting of the British Society for Rheumatology.

In a study of more than 1.5 million cases of acute stroke recorded in the United States between 2015 and 2018, women with SLE were more likely to be hospitalized for longer and less likely to be routinely discharged into their home environment than were those without SLE. No such association was found for men with SLE.

“The findings imply that primary stroke prevention is of utmost importance, especially in females with SLE,” said Sona Jesenakova, a fourth-year medical student at the University of Aberdeen (Scotland).

“There might be a need to explore more effective and targeted treatment strategies to try and minimize these excessive adverse acute stroke outcomes, especially in females with SLE suffering from stroke,” she suggested.

“Even though males form only a minority of the SLE patient population, some studies have shown that they are prone to suffer from worse disease outcomes,” Ms. Jesenakova said.

Importantly, “male sex has been identified as a risk factor for death early in the course of SLE,” she added, highlighting that sex differences do seem to exist in SLE.

Stroke is an important outcome to look at because people with SLE are known to be at higher risk for developing atherosclerosis, which is a widely known risk factor for ischemic stroke, and with antiphospholipid antibody positivity and uncontrolled disease activity, that risk can be increased. A meta-analysis of older studies has suggested that the risk for death after a stroke is 68% higher in people with SLE than in those without.

To examine the risk for death and other in-hospital outcomes in a more contemporary population, Ms. Jesenakova and associates used data from the National Inpatient Sample, a large, publicly available database that contains inpatient health care information from across the United States. Their sample population consisted of 1,581,430 individuals who had been hospitalized for stroke. Of these, there were 6,100 women and 940 men who had SLE; the remainder served as the ‘no-SLE’ control population.

As might be expected, patients with SLE were about 10 years younger than those without SLE; the median age of women and men with SLE and those without SLE were a respective 60, 61, and 71 years.

There was no difference in the type of stroke between the SLE and no-SLE groups; most had an ischemic stroke (around 89%) rather than a hemorrhagic stroke (around 11%).

The researchers analyzed three key outcomes: mortality at discharge, hospitalization prolonged to a stay of more than 4 days, and routine home discharge, meaning that the patient was able to be discharged home versus more specialist facilities such as a nursing home.

They conducted a multivariate analysis with adjustments made for potential confounding factors such as age, ethnicity, type of stroke, and revascularization treatment. Comorbidities, including major cardiovascular disease, were also accounted for.

Although women with SLE were 21% more likely to die than patients without SLE, men with SLE were 24% less likely to die than was the no-SLE population. However, these differences were not statistically significant.

Women with SLE were 20% more likely to have a prolonged hospital stay and 28% less likely to have a routine home discharge, compared with patients who did not have SLE. The 95% confidence intervals were statistically significant, which was not seen when comparing the same outcomes in men with SLE (odds ratios of 1.06 and 1.18, respectively).

“As for males, even though we didn’t find anything of statistical significance, we have to bear in mind that the sample we had was quite small, and thus these results need to be interpreted with caution,” Ms. Jesenakova said. “We also think that we identified a gap in the current knowledge, and as such, further research is needed to help us understand the influence of male sex on acute stroke outcomes in patients with comorbid SLE.”

The researchers performed a secondary analysis looking at the use of revascularization treatments for ischemic stroke and found that there were no differences between individuals with and without SLE. This analysis considered the use of intravenous thrombolysis and endovascular thrombectomy in just over 1.4 million cases but did not look at sex-specific differences.

Ms. Jesenakova had no conflicts of interest to disclose.

In the placebo-controlled REDUCE-IT trial, icosapent ethyl (IPE) was linked to a significant reduction in major adverse cardiovascular events (MACE) when administered on top of LDL cholesterol control, but a new substudy suggests a greater relative advantage in those with a prior myocardial infarction.

In the study as a whole, IPE (Vascepa, Amarin) was tied to a 20% reduction in CV death (hazard ratio, 0.80; P = .03), but it climbed to a 30% reduction (HR, 0.70; P = .01) in the subgroup with a prior MI, reported a multinational team of investigators led by Prakriti Gaba, MD, a cardiologist at Brigham and Women’s Hospital, Boston.

On the basis of these data, “the imperative to treat patients who have a history of prior MI is even stronger,” said Deepak L. Bhatt, MD, executive director of interventional cardiovascular programs at Brigham and Women’s Hospital.

The principal investigator of REDUCE-IT and a coauthor of this subanalysis, Dr. Bhatt said in an interview, “The significant reduction in cardiovascular mortality, as well as sudden cardiac death and cardiac arrest, really should make physicians strongly consider this therapy in eligible patients.”

The main results of the REDUCE-IT trial were published more than 3 years ago. It enrolled patients with established CV disease or diabetes with additional risk factors who were on a statin and had elevated triglyceride (TG) levels.

A 25% reduction in MACE reported

In those randomized to IPE, there was about a 25% reduction in the primary composite MACE outcome of cardiovascular death, nonfatal MI, nonfatal stroke, revascularization, and unstable angina relative to placebo. About the same relative reduction was achieved in the key secondary endpoint of CV death, nonfatal MI, and nonfatal stroke.

Some guidelines have been changed on the basis of these data. The National Lipid Association, for example, conferred a class 1 recommendation for adding IPE to other appropriate lipid-reducing therapies in any individual 45 years of age or older with atherosclerotic cardiovascular disease.

This new substudy (J Am Coll Cardiol. 2022 Apr 25; doi: 10.1016/j.jacc.2022.02.035), is likely to be influential for those guidelines not yet revised. In the substudy of the prior MI patients, the relative benefit of IPE for the primary and secondary MACE endpoints were of similar magnitude to the overall study population, but events occurred more frequently in the prior-MI subgroup, greatly increasing the statistical power of the advantage.


 

More MACE in prior MI patients

For example, the primary outcome was observed in 22% of the placebo patients in the overall REDUCE-IT analysis but in 26.1% of those with prior MI, so even though the relative risk reduction remained at about 25%, the statistical strength was a hundred-fold greater (P = .00001 vs. P < .001).

For the key secondary composite MACE endpoint, the relative reduction for those with a prior MI was modestly greater than the study as a whole (HR 0.71 vs. HR. 075) but the statistical strength was again magnified in those with a prior MI (P = .00006 vs. P < .001). In those with a prior MI , the advantage of receiving IPE was similar whether or not there had been a prior revascularization.

The 20% lower rate of all-cause mortality among prior MI patients receiving IPE rather than placebo fell just short of statistical significance (HR, 0.80; P = .054). Ischemic events on IPE were reduced by 35% (P = .0000001) and recurrent MI was reduced by 34% (P = .00009).

In the substudy as well as in the REDUCE-IT trial overall, IPE was well tolerated. A slightly higher rate of atrial fibrillation was reported in both.

The REDUCE-IT substudy evaluated 3,693 patients with a history of MI, representing 45% of the 8,179 patients randomized.

IPE, an ethyl ester of the omega-3 polyunsaturated fatty acid, initially attracted attention for its ability to reduce elevated TG. It was hoped this would address reduce residual risk in patients on maximally reduced LDL cholesterol. However, it is suspected that IPE exerts benefits additive to or independent of TG lowering, according to the authors of the REDUCE-IT substudy. These include attenuation of the inflammatory response, release of nitric oxide, and effects that support stabilization of atherosclerotic plaque.

The investigators reported that the pattern of response supports this theory. In the newly reported substudy, the primary event curves that included nonthrombotic events separated at about 1 year, but even curves for CV death and sudden cardiac death were more delayed.

This delay might be explained “by the slow but steady reduction in plaque volume, mitigation of inflammation, improvements in endothelial function, and membrane stabilization,” according to the authors, who cited studies suggesting each of these effects might not be wholly dependent on TG reductions alone.
 

Prior TG-lowering studies disappointing

In fact, several studies evaluating other strategies for TG reductions have been disappointing, according to an accompanying editorial (J Am Coll Cardiol. 2022 Apr 25; doi: 10.1016/j.jacc.2022.03.001). For example, the STRENGTH trial did not show clinical benefits despite a slightly greater reduction in TGs than that shown in REDUCE-IT (19% reduction vs. 18.3%).

Overall, the REDUCE-IT trial and the prior-MI REDUCE-IT substudy show that there is targetable residual risk in high risk patients on statin therapy. One of the authors of the editorial that accompanied the prior-MI substudy of REDUCE-IT, William E. Boden, MD, professor of medicine, Boston University, emphasized this point. On the basis of REDUCE-IT, he said he believes that IPE should be considered to have broad indications as an adjunctive treatment to other lipid-lowering strategies.

“My practice centers on optimizing secondary prevention in high-risk patients who have elevated TG levels despite well-controlled LDL levels on statins, ezetimibe, or even PCSK-9 [proprotein convertase subtilisin/kexin type 9] inhibitors,” Dr. Boden said in an interview. Patients with diabetes are notorious for presenting with this profile of dyslipidemia, but he added that “even nondiabetics with prior MI, acute coronary syndrome, or revascularization will benefit from the addition of IPE to high-potency statins.”

Although the American Heart Association and the American College of Cardiology have not yet updated their guidelines to include IPE, Dr. Boden pointed out that the European Society of Cardiology, the Canadian Cardiovascular Society, and the American Diabetes Society have.

Dr. Bhatt added that there is a clear message from REDUCE-IT that IPE addresses residual risk.

Targeting the subgroup of high-risk patients with elevated TGs “is easy” because they are so readily identifiable, according to Dr. Bhatt, but he said it should be used for any patient that meet the entry criteria used for REDUCE-IT.

“The overall results of REDUCE-IT were robustly positive, so I wouldn’t just use it in patients with prior MI,” Dr. Bhatt said.

Dr. Bhatt reports financial relationships with more than 20 pharmaceutical companies, including Amarin, which provided funding for this trial. Dr. Boden reports no potential conflicts of interest.

In the placebo-controlled REDUCE-IT trial, icosapent ethyl (IPE) was linked to a significant reduction in major adverse cardiovascular events (MACE) when administered on top of LDL cholesterol control, but a new substudy suggests a greater relative advantage in those with a prior myocardial infarction.

In the study as a whole, IPE (Vascepa, Amarin) was tied to a 20% reduction in CV death (hazard ratio, 0.80; P = .03), but it climbed to a 30% reduction (HR, 0.70; P = .01) in the subgroup with a prior MI, reported a multinational team of investigators led by Prakriti Gaba, MD, a cardiologist at Brigham and Women’s Hospital, Boston.

On the basis of these data, “the imperative to treat patients who have a history of prior MI is even stronger,” said Deepak L. Bhatt, MD, executive director of interventional cardiovascular programs at Brigham and Women’s Hospital.

The principal investigator of REDUCE-IT and a coauthor of this subanalysis, Dr. Bhatt said in an interview, “The significant reduction in cardiovascular mortality, as well as sudden cardiac death and cardiac arrest, really should make physicians strongly consider this therapy in eligible patients.”

The main results of the REDUCE-IT trial were published more than 3 years ago. It enrolled patients with established CV disease or diabetes with additional risk factors who were on a statin and had elevated triglyceride (TG) levels.

A 25% reduction in MACE reported

In those randomized to IPE, there was about a 25% reduction in the primary composite MACE outcome of cardiovascular death, nonfatal MI, nonfatal stroke, revascularization, and unstable angina relative to placebo. About the same relative reduction was achieved in the key secondary endpoint of CV death, nonfatal MI, and nonfatal stroke.

Some guidelines have been changed on the basis of these data. The National Lipid Association, for example, conferred a class 1 recommendation for adding IPE to other appropriate lipid-reducing therapies in any individual 45 years of age or older with atherosclerotic cardiovascular disease.

This new substudy (J Am Coll Cardiol. 2022 Apr 25; doi: 10.1016/j.jacc.2022.02.035), is likely to be influential for those guidelines not yet revised. In the substudy of the prior MI patients, the relative benefit of IPE for the primary and secondary MACE endpoints were of similar magnitude to the overall study population, but events occurred more frequently in the prior-MI subgroup, greatly increasing the statistical power of the advantage.


 

More MACE in prior MI patients

For example, the primary outcome was observed in 22% of the placebo patients in the overall REDUCE-IT analysis but in 26.1% of those with prior MI, so even though the relative risk reduction remained at about 25%, the statistical strength was a hundred-fold greater (P = .00001 vs. P < .001).

For the key secondary composite MACE endpoint, the relative reduction for those with a prior MI was modestly greater than the study as a whole (HR 0.71 vs. HR. 075) but the statistical strength was again magnified in those with a prior MI (P = .00006 vs. P < .001). In those with a prior MI , the advantage of receiving IPE was similar whether or not there had been a prior revascularization.

The 20% lower rate of all-cause mortality among prior MI patients receiving IPE rather than placebo fell just short of statistical significance (HR, 0.80; P = .054). Ischemic events on IPE were reduced by 35% (P = .0000001) and recurrent MI was reduced by 34% (P = .00009).

In the substudy as well as in the REDUCE-IT trial overall, IPE was well tolerated. A slightly higher rate of atrial fibrillation was reported in both.

The REDUCE-IT substudy evaluated 3,693 patients with a history of MI, representing 45% of the 8,179 patients randomized.

IPE, an ethyl ester of the omega-3 polyunsaturated fatty acid, initially attracted attention for its ability to reduce elevated TG. It was hoped this would address reduce residual risk in patients on maximally reduced LDL cholesterol. However, it is suspected that IPE exerts benefits additive to or independent of TG lowering, according to the authors of the REDUCE-IT substudy. These include attenuation of the inflammatory response, release of nitric oxide, and effects that support stabilization of atherosclerotic plaque.

The investigators reported that the pattern of response supports this theory. In the newly reported substudy, the primary event curves that included nonthrombotic events separated at about 1 year, but even curves for CV death and sudden cardiac death were more delayed.

This delay might be explained “by the slow but steady reduction in plaque volume, mitigation of inflammation, improvements in endothelial function, and membrane stabilization,” according to the authors, who cited studies suggesting each of these effects might not be wholly dependent on TG reductions alone.
 

Prior TG-lowering studies disappointing

In fact, several studies evaluating other strategies for TG reductions have been disappointing, according to an accompanying editorial (J Am Coll Cardiol. 2022 Apr 25; doi: 10.1016/j.jacc.2022.03.001). For example, the STRENGTH trial did not show clinical benefits despite a slightly greater reduction in TGs than that shown in REDUCE-IT (19% reduction vs. 18.3%).

Overall, the REDUCE-IT trial and the prior-MI REDUCE-IT substudy show that there is targetable residual risk in high risk patients on statin therapy. One of the authors of the editorial that accompanied the prior-MI substudy of REDUCE-IT, William E. Boden, MD, professor of medicine, Boston University, emphasized this point. On the basis of REDUCE-IT, he said he believes that IPE should be considered to have broad indications as an adjunctive treatment to other lipid-lowering strategies.

“My practice centers on optimizing secondary prevention in high-risk patients who have elevated TG levels despite well-controlled LDL levels on statins, ezetimibe, or even PCSK-9 [proprotein convertase subtilisin/kexin type 9] inhibitors,” Dr. Boden said in an interview. Patients with diabetes are notorious for presenting with this profile of dyslipidemia, but he added that “even nondiabetics with prior MI, acute coronary syndrome, or revascularization will benefit from the addition of IPE to high-potency statins.”

Although the American Heart Association and the American College of Cardiology have not yet updated their guidelines to include IPE, Dr. Boden pointed out that the European Society of Cardiology, the Canadian Cardiovascular Society, and the American Diabetes Society have.

Dr. Bhatt added that there is a clear message from REDUCE-IT that IPE addresses residual risk.

Targeting the subgroup of high-risk patients with elevated TGs “is easy” because they are so readily identifiable, according to Dr. Bhatt, but he said it should be used for any patient that meet the entry criteria used for REDUCE-IT.

“The overall results of REDUCE-IT were robustly positive, so I wouldn’t just use it in patients with prior MI,” Dr. Bhatt said.

Dr. Bhatt reports financial relationships with more than 20 pharmaceutical companies, including Amarin, which provided funding for this trial. Dr. Boden reports no potential conflicts of interest.

In the placebo-controlled REDUCE-IT trial, icosapent ethyl (IPE) was linked to a significant reduction in major adverse cardiovascular events (MACE) when administered on top of LDL cholesterol control, but a new substudy suggests a greater relative advantage in those with a prior myocardial infarction.

In the study as a whole, IPE (Vascepa, Amarin) was tied to a 20% reduction in CV death (hazard ratio, 0.80; P = .03), but it climbed to a 30% reduction (HR, 0.70; P = .01) in the subgroup with a prior MI, reported a multinational team of investigators led by Prakriti Gaba, MD, a cardiologist at Brigham and Women’s Hospital, Boston.

On the basis of these data, “the imperative to treat patients who have a history of prior MI is even stronger,” said Deepak L. Bhatt, MD, executive director of interventional cardiovascular programs at Brigham and Women’s Hospital.

The principal investigator of REDUCE-IT and a coauthor of this subanalysis, Dr. Bhatt said in an interview, “The significant reduction in cardiovascular mortality, as well as sudden cardiac death and cardiac arrest, really should make physicians strongly consider this therapy in eligible patients.”

The main results of the REDUCE-IT trial were published more than 3 years ago. It enrolled patients with established CV disease or diabetes with additional risk factors who were on a statin and had elevated triglyceride (TG) levels.

A 25% reduction in MACE reported

In those randomized to IPE, there was about a 25% reduction in the primary composite MACE outcome of cardiovascular death, nonfatal MI, nonfatal stroke, revascularization, and unstable angina relative to placebo. About the same relative reduction was achieved in the key secondary endpoint of CV death, nonfatal MI, and nonfatal stroke.

Some guidelines have been changed on the basis of these data. The National Lipid Association, for example, conferred a class 1 recommendation for adding IPE to other appropriate lipid-reducing therapies in any individual 45 years of age or older with atherosclerotic cardiovascular disease.

This new substudy (J Am Coll Cardiol. 2022 Apr 25; doi: 10.1016/j.jacc.2022.02.035), is likely to be influential for those guidelines not yet revised. In the substudy of the prior MI patients, the relative benefit of IPE for the primary and secondary MACE endpoints were of similar magnitude to the overall study population, but events occurred more frequently in the prior-MI subgroup, greatly increasing the statistical power of the advantage.


 

More MACE in prior MI patients

For example, the primary outcome was observed in 22% of the placebo patients in the overall REDUCE-IT analysis but in 26.1% of those with prior MI, so even though the relative risk reduction remained at about 25%, the statistical strength was a hundred-fold greater (P = .00001 vs. P < .001).

For the key secondary composite MACE endpoint, the relative reduction for those with a prior MI was modestly greater than the study as a whole (HR 0.71 vs. HR. 075) but the statistical strength was again magnified in those with a prior MI (P = .00006 vs. P < .001). In those with a prior MI , the advantage of receiving IPE was similar whether or not there had been a prior revascularization.

The 20% lower rate of all-cause mortality among prior MI patients receiving IPE rather than placebo fell just short of statistical significance (HR, 0.80; P = .054). Ischemic events on IPE were reduced by 35% (P = .0000001) and recurrent MI was reduced by 34% (P = .00009).

In the substudy as well as in the REDUCE-IT trial overall, IPE was well tolerated. A slightly higher rate of atrial fibrillation was reported in both.

The REDUCE-IT substudy evaluated 3,693 patients with a history of MI, representing 45% of the 8,179 patients randomized.

IPE, an ethyl ester of the omega-3 polyunsaturated fatty acid, initially attracted attention for its ability to reduce elevated TG. It was hoped this would address reduce residual risk in patients on maximally reduced LDL cholesterol. However, it is suspected that IPE exerts benefits additive to or independent of TG lowering, according to the authors of the REDUCE-IT substudy. These include attenuation of the inflammatory response, release of nitric oxide, and effects that support stabilization of atherosclerotic plaque.

The investigators reported that the pattern of response supports this theory. In the newly reported substudy, the primary event curves that included nonthrombotic events separated at about 1 year, but even curves for CV death and sudden cardiac death were more delayed.

This delay might be explained “by the slow but steady reduction in plaque volume, mitigation of inflammation, improvements in endothelial function, and membrane stabilization,” according to the authors, who cited studies suggesting each of these effects might not be wholly dependent on TG reductions alone.
 

Prior TG-lowering studies disappointing

In fact, several studies evaluating other strategies for TG reductions have been disappointing, according to an accompanying editorial (J Am Coll Cardiol. 2022 Apr 25; doi: 10.1016/j.jacc.2022.03.001). For example, the STRENGTH trial did not show clinical benefits despite a slightly greater reduction in TGs than that shown in REDUCE-IT (19% reduction vs. 18.3%).

Overall, the REDUCE-IT trial and the prior-MI REDUCE-IT substudy show that there is targetable residual risk in high risk patients on statin therapy. One of the authors of the editorial that accompanied the prior-MI substudy of REDUCE-IT, William E. Boden, MD, professor of medicine, Boston University, emphasized this point. On the basis of REDUCE-IT, he said he believes that IPE should be considered to have broad indications as an adjunctive treatment to other lipid-lowering strategies.

“My practice centers on optimizing secondary prevention in high-risk patients who have elevated TG levels despite well-controlled LDL levels on statins, ezetimibe, or even PCSK-9 [proprotein convertase subtilisin/kexin type 9] inhibitors,” Dr. Boden said in an interview. Patients with diabetes are notorious for presenting with this profile of dyslipidemia, but he added that “even nondiabetics with prior MI, acute coronary syndrome, or revascularization will benefit from the addition of IPE to high-potency statins.”

Although the American Heart Association and the American College of Cardiology have not yet updated their guidelines to include IPE, Dr. Boden pointed out that the European Society of Cardiology, the Canadian Cardiovascular Society, and the American Diabetes Society have.

Dr. Bhatt added that there is a clear message from REDUCE-IT that IPE addresses residual risk.

Targeting the subgroup of high-risk patients with elevated TGs “is easy” because they are so readily identifiable, according to Dr. Bhatt, but he said it should be used for any patient that meet the entry criteria used for REDUCE-IT.

“The overall results of REDUCE-IT were robustly positive, so I wouldn’t just use it in patients with prior MI,” Dr. Bhatt said.

Dr. Bhatt reports financial relationships with more than 20 pharmaceutical companies, including Amarin, which provided funding for this trial. Dr. Boden reports no potential conflicts of interest.

Although lipoprotein(a) is causally related to coronary artery disease and aortic valve stenosis – two known risk factors for atrial fibrillation (AFib) – evidence linking Lp(a) to a causal role in the development of AFib has been lukewarm at best.

A recent Mendelian randomization study showed only a nominally significant effect of Lp(a) on AFib, whereas an ARIC substudy showed high levels of Lp(a) to be associated with elevated ischemic stroke risk but not incident AFib.

A new study that adds the heft of Mendelian randomization to large observational and genetic analyses, however, implicates Lp(a) as a potential causal mediator of AFib, independent of its known effects on atherosclerotic cardiovascular disease (ASCVD).

“Why this is exciting is because it shows that Lp(a) has effects beyond the arteries and beyond the aortic valve, and that provides two things,” senior author Guillaume Paré, MD, MSc, Population Health Research Institute, Hamilton, Ontario, told this news organization.

“First, it provides a potential means to decrease the risk, because there are all these Lp(a) inhibitors in development,” he said. “But I think the other thing is that it just points to a new pathway that leads to atrial fibrillation development that could potentially be targeted with other drugs when it’s better understood. We don’t pretend that we understand the biology there, but it opens this possibility.”

The results were published in the Journal of the American College of Cardiology.

Using data from 435,579 participants in the UK Biobank, the researchers identified 20,432 cases of incident AFib over a median of 11 years of follow-up. They also constructed a genetic risk score for Lp(a) using genetic variants within 500 kb of the LPA gene.

After common AFib risk factors were controlled for, results showed a 3% increased risk for incident AFib per 50 nmol/L increase in Lp(a) at enrollment (hazard ratio, 1.03; 95% confidence interval, 1.02-1.05).

A Mendelian randomization analysis showed a similar association between genetically predicted Lp(a) and AFib (odds ratio, 1.03; 95% CI, 1.02-1.05).

To replicate the results, the investigators performed separate Mendelian randomization analyses using publicly available genome-wide association study (GWAS) statistics from the largest GWAS of AFib involving more than 1 million participants and from the FinnGen cohort involving more than 114,000 Finnish residents.

The analyses showed a 3% increase in risk for AFib in the genome-wide study (OR, 1.03; 95% CI, 1.02-1.05) and an 8% increase in risk in the Finnish study (OR, 1.08; 95% CI, 1.04-1.12) per 50 nmol/L increase in Lp(a).

There was no evidence that the effect of observed or genetically predicted Lp(a) was modified by prevalent ischemic heart disease or aortic stenosis.

Further, MR analyses revealed no risk effect of low-density-lipoprotein cholesterol or triglycerides on AFib.

Notably, only 39% of Lp(a) was mediated through ASCVD, suggesting that Lp(a) partly influences AFib independent of its known effect on ASCVD.

“To me, the eureka moment is when we repeated the same analysis for LDL cholesterol and it had absolutely no association with AFib,” Dr. Paré said. “Because up to that point, there was always this lingering doubt that, well, it’s because of coronary artery disease, and that’s logical. But the signal is completely flat with LDL, and we see this strong signal with Lp(a).”

Another ‘red flag’

Erin D. Michos, MD, MHS, senior author of the ARIC substudy and associate director of preventive cardiology at Johns Hopkins School of Medicine, Baltimore, said the findings are “another red flag that lipoprotein(a) is a marker we need to pay attention to and potentially needs treatment.”

“The fact that it was Mendelian randomization does suggest that there’s a causal role,” she said. “I think the relationship is relatively modest compared to its known risk for stroke, ASCVD, coronary disease, and aortic stenosis, ... which may be why we didn’t see it in the ARIC cohort with 12,000 participants. You needed to have a million participants and 60,000 cases to see an effect here.”

Dr. Michos said she hopes the findings encourage increased testing, particularly with multiple potential treatments currently in the pipeline. She pointed out that the researchers estimated that the experimental antisense agent pelacarsen, which lowers Lp(a) by about 80%, would translate into about an 8% reduction in AFib risk, or “the same effect as 2 kg of weight loss or a 5 mm Hg reduction in blood pressure, which we do think are meaningful.”

Adding to this point in an accompanying editorial, Daniel Seung Kim, MD, PhD, and Abha Khandelwal, MD, MS, Stanford University School of Medicine, California, say that “moreover, reduction of Lp(a) levels would have multifactorial effects on CAD, cerebrovascular/peripheral artery disease, and AS risk.

“Therefore, approaches to reduce Lp(a) should be prioritized to further reduce the morbidity and mortality of a rapidly aging population,” they write.

The editorialists also join the researchers in calling for inclusion of AFib as a secondary outcome in ongoing Lp(a) trials, in addition to cerebrovascular disease and peripheral vascular disease.
 

Unanswered questions

As to what’s driving the risk effect of Lp(a), first author Pedrum Mohammadi-Shemirani, PhD, also from the Population Health Research Institute, explained that in aortic stenosis, “mechanical stress increases endothelial permeability, allowing Lp(a) to infiltrate valvular tissue and induce gene expression that results in microcalcifications and cell death.”

“So, in theory, a similar sort of mechanism could be at play in atrial tissue that may lead to damage and the electrical remodeling that causes atrial fibrillation,” he told this news organization.

Dr. Mohammadi-Shemirani also noted that Lp(a) has proinflammatory properties, but added that any potential mechanisms are “speculative and require further research to disentangle.”

Dr. Paré and colleagues say follow-up studies are also warranted, noting that generalizability of the results may be limited because AFib cases were found using electronic health records in the population-scale cohorts and because few UK Biobank participants were of non-European ancestry and Lp(a) levels vary among ethnic groups.

Another limitation is that the number of kringle IV type 2 domain repeats within the LPA gene, the largest contributor to genetic variation in Lp(a), could not be directly measured. Still, 71.4% of the variation in Lp(a) was explained using the genetic risk score alone, they say.

Dr. Paré holds the Canada Research Chair in Genetic and Molecular Epidemiology and Cisco Systems Professorship in Integrated Health Biosystems. Dr. Mohammadi-Shemirani is supported by the Frederick Banting and Charles Best Canada Graduate Scholarship from the Canadian Institute of Health Research. Dr. Michos reports consulting for Novartis and serving on advisory boards for Novartis, AstraZeneca, Bayer, and Boehringer Ingelheim. Dr. Kim reports grant support from the National Institutes of Health and the American Heart Association. Dr. Khandelwal serves on the advisory board of Amgen and has received funding from Novartis CTQJ and Akcea.

A version of this article first appeared on Medscape.com.

Although lipoprotein(a) is causally related to coronary artery disease and aortic valve stenosis – two known risk factors for atrial fibrillation (AFib) – evidence linking Lp(a) to a causal role in the development of AFib has been lukewarm at best.

A recent Mendelian randomization study showed only a nominally significant effect of Lp(a) on AFib, whereas an ARIC substudy showed high levels of Lp(a) to be associated with elevated ischemic stroke risk but not incident AFib.

A new study that adds the heft of Mendelian randomization to large observational and genetic analyses, however, implicates Lp(a) as a potential causal mediator of AFib, independent of its known effects on atherosclerotic cardiovascular disease (ASCVD).

“Why this is exciting is because it shows that Lp(a) has effects beyond the arteries and beyond the aortic valve, and that provides two things,” senior author Guillaume Paré, MD, MSc, Population Health Research Institute, Hamilton, Ontario, told this news organization.

“First, it provides a potential means to decrease the risk, because there are all these Lp(a) inhibitors in development,” he said. “But I think the other thing is that it just points to a new pathway that leads to atrial fibrillation development that could potentially be targeted with other drugs when it’s better understood. We don’t pretend that we understand the biology there, but it opens this possibility.”

The results were published in the Journal of the American College of Cardiology.

Using data from 435,579 participants in the UK Biobank, the researchers identified 20,432 cases of incident AFib over a median of 11 years of follow-up. They also constructed a genetic risk score for Lp(a) using genetic variants within 500 kb of the LPA gene.

After common AFib risk factors were controlled for, results showed a 3% increased risk for incident AFib per 50 nmol/L increase in Lp(a) at enrollment (hazard ratio, 1.03; 95% confidence interval, 1.02-1.05).

A Mendelian randomization analysis showed a similar association between genetically predicted Lp(a) and AFib (odds ratio, 1.03; 95% CI, 1.02-1.05).

To replicate the results, the investigators performed separate Mendelian randomization analyses using publicly available genome-wide association study (GWAS) statistics from the largest GWAS of AFib involving more than 1 million participants and from the FinnGen cohort involving more than 114,000 Finnish residents.

The analyses showed a 3% increase in risk for AFib in the genome-wide study (OR, 1.03; 95% CI, 1.02-1.05) and an 8% increase in risk in the Finnish study (OR, 1.08; 95% CI, 1.04-1.12) per 50 nmol/L increase in Lp(a).

There was no evidence that the effect of observed or genetically predicted Lp(a) was modified by prevalent ischemic heart disease or aortic stenosis.

Further, MR analyses revealed no risk effect of low-density-lipoprotein cholesterol or triglycerides on AFib.

Notably, only 39% of Lp(a) was mediated through ASCVD, suggesting that Lp(a) partly influences AFib independent of its known effect on ASCVD.

“To me, the eureka moment is when we repeated the same analysis for LDL cholesterol and it had absolutely no association with AFib,” Dr. Paré said. “Because up to that point, there was always this lingering doubt that, well, it’s because of coronary artery disease, and that’s logical. But the signal is completely flat with LDL, and we see this strong signal with Lp(a).”

Another ‘red flag’

Erin D. Michos, MD, MHS, senior author of the ARIC substudy and associate director of preventive cardiology at Johns Hopkins School of Medicine, Baltimore, said the findings are “another red flag that lipoprotein(a) is a marker we need to pay attention to and potentially needs treatment.”

“The fact that it was Mendelian randomization does suggest that there’s a causal role,” she said. “I think the relationship is relatively modest compared to its known risk for stroke, ASCVD, coronary disease, and aortic stenosis, ... which may be why we didn’t see it in the ARIC cohort with 12,000 participants. You needed to have a million participants and 60,000 cases to see an effect here.”

Dr. Michos said she hopes the findings encourage increased testing, particularly with multiple potential treatments currently in the pipeline. She pointed out that the researchers estimated that the experimental antisense agent pelacarsen, which lowers Lp(a) by about 80%, would translate into about an 8% reduction in AFib risk, or “the same effect as 2 kg of weight loss or a 5 mm Hg reduction in blood pressure, which we do think are meaningful.”

Adding to this point in an accompanying editorial, Daniel Seung Kim, MD, PhD, and Abha Khandelwal, MD, MS, Stanford University School of Medicine, California, say that “moreover, reduction of Lp(a) levels would have multifactorial effects on CAD, cerebrovascular/peripheral artery disease, and AS risk.

“Therefore, approaches to reduce Lp(a) should be prioritized to further reduce the morbidity and mortality of a rapidly aging population,” they write.

The editorialists also join the researchers in calling for inclusion of AFib as a secondary outcome in ongoing Lp(a) trials, in addition to cerebrovascular disease and peripheral vascular disease.
 

Unanswered questions

As to what’s driving the risk effect of Lp(a), first author Pedrum Mohammadi-Shemirani, PhD, also from the Population Health Research Institute, explained that in aortic stenosis, “mechanical stress increases endothelial permeability, allowing Lp(a) to infiltrate valvular tissue and induce gene expression that results in microcalcifications and cell death.”

“So, in theory, a similar sort of mechanism could be at play in atrial tissue that may lead to damage and the electrical remodeling that causes atrial fibrillation,” he told this news organization.

Dr. Mohammadi-Shemirani also noted that Lp(a) has proinflammatory properties, but added that any potential mechanisms are “speculative and require further research to disentangle.”

Dr. Paré and colleagues say follow-up studies are also warranted, noting that generalizability of the results may be limited because AFib cases were found using electronic health records in the population-scale cohorts and because few UK Biobank participants were of non-European ancestry and Lp(a) levels vary among ethnic groups.

Another limitation is that the number of kringle IV type 2 domain repeats within the LPA gene, the largest contributor to genetic variation in Lp(a), could not be directly measured. Still, 71.4% of the variation in Lp(a) was explained using the genetic risk score alone, they say.

Dr. Paré holds the Canada Research Chair in Genetic and Molecular Epidemiology and Cisco Systems Professorship in Integrated Health Biosystems. Dr. Mohammadi-Shemirani is supported by the Frederick Banting and Charles Best Canada Graduate Scholarship from the Canadian Institute of Health Research. Dr. Michos reports consulting for Novartis and serving on advisory boards for Novartis, AstraZeneca, Bayer, and Boehringer Ingelheim. Dr. Kim reports grant support from the National Institutes of Health and the American Heart Association. Dr. Khandelwal serves on the advisory board of Amgen and has received funding from Novartis CTQJ and Akcea.

A version of this article first appeared on Medscape.com.

Although lipoprotein(a) is causally related to coronary artery disease and aortic valve stenosis – two known risk factors for atrial fibrillation (AFib) – evidence linking Lp(a) to a causal role in the development of AFib has been lukewarm at best.

A recent Mendelian randomization study showed only a nominally significant effect of Lp(a) on AFib, whereas an ARIC substudy showed high levels of Lp(a) to be associated with elevated ischemic stroke risk but not incident AFib.

A new study that adds the heft of Mendelian randomization to large observational and genetic analyses, however, implicates Lp(a) as a potential causal mediator of AFib, independent of its known effects on atherosclerotic cardiovascular disease (ASCVD).

“Why this is exciting is because it shows that Lp(a) has effects beyond the arteries and beyond the aortic valve, and that provides two things,” senior author Guillaume Paré, MD, MSc, Population Health Research Institute, Hamilton, Ontario, told this news organization.

“First, it provides a potential means to decrease the risk, because there are all these Lp(a) inhibitors in development,” he said. “But I think the other thing is that it just points to a new pathway that leads to atrial fibrillation development that could potentially be targeted with other drugs when it’s better understood. We don’t pretend that we understand the biology there, but it opens this possibility.”

The results were published in the Journal of the American College of Cardiology.

Using data from 435,579 participants in the UK Biobank, the researchers identified 20,432 cases of incident AFib over a median of 11 years of follow-up. They also constructed a genetic risk score for Lp(a) using genetic variants within 500 kb of the LPA gene.

After common AFib risk factors were controlled for, results showed a 3% increased risk for incident AFib per 50 nmol/L increase in Lp(a) at enrollment (hazard ratio, 1.03; 95% confidence interval, 1.02-1.05).

A Mendelian randomization analysis showed a similar association between genetically predicted Lp(a) and AFib (odds ratio, 1.03; 95% CI, 1.02-1.05).

To replicate the results, the investigators performed separate Mendelian randomization analyses using publicly available genome-wide association study (GWAS) statistics from the largest GWAS of AFib involving more than 1 million participants and from the FinnGen cohort involving more than 114,000 Finnish residents.

The analyses showed a 3% increase in risk for AFib in the genome-wide study (OR, 1.03; 95% CI, 1.02-1.05) and an 8% increase in risk in the Finnish study (OR, 1.08; 95% CI, 1.04-1.12) per 50 nmol/L increase in Lp(a).

There was no evidence that the effect of observed or genetically predicted Lp(a) was modified by prevalent ischemic heart disease or aortic stenosis.

Further, MR analyses revealed no risk effect of low-density-lipoprotein cholesterol or triglycerides on AFib.

Notably, only 39% of Lp(a) was mediated through ASCVD, suggesting that Lp(a) partly influences AFib independent of its known effect on ASCVD.

“To me, the eureka moment is when we repeated the same analysis for LDL cholesterol and it had absolutely no association with AFib,” Dr. Paré said. “Because up to that point, there was always this lingering doubt that, well, it’s because of coronary artery disease, and that’s logical. But the signal is completely flat with LDL, and we see this strong signal with Lp(a).”

Another ‘red flag’

Erin D. Michos, MD, MHS, senior author of the ARIC substudy and associate director of preventive cardiology at Johns Hopkins School of Medicine, Baltimore, said the findings are “another red flag that lipoprotein(a) is a marker we need to pay attention to and potentially needs treatment.”

“The fact that it was Mendelian randomization does suggest that there’s a causal role,” she said. “I think the relationship is relatively modest compared to its known risk for stroke, ASCVD, coronary disease, and aortic stenosis, ... which may be why we didn’t see it in the ARIC cohort with 12,000 participants. You needed to have a million participants and 60,000 cases to see an effect here.”

Dr. Michos said she hopes the findings encourage increased testing, particularly with multiple potential treatments currently in the pipeline. She pointed out that the researchers estimated that the experimental antisense agent pelacarsen, which lowers Lp(a) by about 80%, would translate into about an 8% reduction in AFib risk, or “the same effect as 2 kg of weight loss or a 5 mm Hg reduction in blood pressure, which we do think are meaningful.”

Adding to this point in an accompanying editorial, Daniel Seung Kim, MD, PhD, and Abha Khandelwal, MD, MS, Stanford University School of Medicine, California, say that “moreover, reduction of Lp(a) levels would have multifactorial effects on CAD, cerebrovascular/peripheral artery disease, and AS risk.

“Therefore, approaches to reduce Lp(a) should be prioritized to further reduce the morbidity and mortality of a rapidly aging population,” they write.

The editorialists also join the researchers in calling for inclusion of AFib as a secondary outcome in ongoing Lp(a) trials, in addition to cerebrovascular disease and peripheral vascular disease.
 

Unanswered questions

As to what’s driving the risk effect of Lp(a), first author Pedrum Mohammadi-Shemirani, PhD, also from the Population Health Research Institute, explained that in aortic stenosis, “mechanical stress increases endothelial permeability, allowing Lp(a) to infiltrate valvular tissue and induce gene expression that results in microcalcifications and cell death.”

“So, in theory, a similar sort of mechanism could be at play in atrial tissue that may lead to damage and the electrical remodeling that causes atrial fibrillation,” he told this news organization.

Dr. Mohammadi-Shemirani also noted that Lp(a) has proinflammatory properties, but added that any potential mechanisms are “speculative and require further research to disentangle.”

Dr. Paré and colleagues say follow-up studies are also warranted, noting that generalizability of the results may be limited because AFib cases were found using electronic health records in the population-scale cohorts and because few UK Biobank participants were of non-European ancestry and Lp(a) levels vary among ethnic groups.

Another limitation is that the number of kringle IV type 2 domain repeats within the LPA gene, the largest contributor to genetic variation in Lp(a), could not be directly measured. Still, 71.4% of the variation in Lp(a) was explained using the genetic risk score alone, they say.

Dr. Paré holds the Canada Research Chair in Genetic and Molecular Epidemiology and Cisco Systems Professorship in Integrated Health Biosystems. Dr. Mohammadi-Shemirani is supported by the Frederick Banting and Charles Best Canada Graduate Scholarship from the Canadian Institute of Health Research. Dr. Michos reports consulting for Novartis and serving on advisory boards for Novartis, AstraZeneca, Bayer, and Boehringer Ingelheim. Dr. Kim reports grant support from the National Institutes of Health and the American Heart Association. Dr. Khandelwal serves on the advisory board of Amgen and has received funding from Novartis CTQJ and Akcea.

A version of this article first appeared on Medscape.com.

As coprescribing drugs for erectile dysfunction and oral organic nitrates for ischemic heart disease (IHD) surged, cardiovascular adverse events did not significantly increase, a new study finds.

The authors of the new research specifically examined how frequently phosphodiesterase type 5 (PDE5) inhibitors, such as Viagra, were prescribed. The U.S. Food and Drug Administration and the European Medicines Agency have warned that these drugs for erectile dysfunction are contraindicated for use with nitrates because of concerns about cardiovascular risks.

“Small, randomized, pharmacologic studies have reported an amplified decrease in blood pressure during controlled coexposure with nitrates and [phosphodiesterase type 5 inhibitors], both in healthy participants and in participants with IHD,” wrote lead author Anders Holt, MD, of Copenhagen University Hospital–Herlev and Gentofte and colleagues, in Annals of Internal Medicine. “Potentially, this increases the risk for vascular ischemic events including myocardial infarction and stroke.”

But there is a scarcity of real-world data showing that using both types of drugs together increase these risks, the researchers noted.

To address this knowledge gap, Dr. Holt and colleagues conducted a retrospective study involving 249,541 Danish men with IHD. In this overall population, from 2000 to 2018, prescriptions for PDE5 inhibitors increased 10-fold, from 3.1 to 30.9 prescriptions per 100 persons per year. Within a subgroup of 42,073 patients continuously prescribed oral organic nitrates, PDE5-inhibitor prescriptions jumped twice that magnitude, from 0.9 to 19.7 prescriptions per 100 persons per year.

Despite this surge in coprescribing, the investigators did not observe a significant increase in either of two composite measures of cardiovascular adverse events. The first composite included ischemic stroke, shock, cardiac arrest, myocardial infarction, or acute coronary arteriography (odds ratio, 0.58; 95% confidence interval, 0.28-1.13). The second composite included drug-related adverse events, angina pectoris, or syncope (OR, 0.73; CI, 0.40-1.32).
 

Lead author speculates on reasons for findings

“I propose several explanations [for these findings],” Dr. Holt said in an interview, “but I want to emphasize that our study does not contain any data to back it up. It is just speculation. First, the observed drop in blood pressure may not cause a condition for which patients seek a hospital. A drop in blood pressure has been shown in pharmacologic trials, but it might not translate to a real-life risk for cardiovascular outcomes. Second, patients could be well informed and adherent to guidance that the prescribing physician has provided. For example, patients are aware of the recommended pause in nitrate treatment before PDE5-inhibitor use and follow these recommendations. Third, nitrates are often taken in the morning, and with the careful assumption that most PDE5-inhibitor activities take place in the evening, the nitrates could be metabolized to a degree such that the synergistic interaction is negligible.”

Dr. Holt went on to suggest a novel clinical approach based on the new findings.

“Coadministration should still be contraindicated due to the proven drop in blood pressure,” he said. “However, perhaps physicians can allow for coprescription if patients are adequately informed.”

A qualitative study is needed to determine how patients and physicians discuss coprescription, including avoidance of coadministration, Dr. Holt added.
 

Findings call for a reassessment of whether the contraindication is warranted

Robert A. Kloner, MD, PhD, chief science officer at the Huntington Medical Research Institutes in Pasadena, Calif., and professor of medicine at University of Southern California, Los Angeles, previously conducted research exploring drug interactions with PDE5 inhibitors, and in 2018, coauthored a literature review that concluded that PDE5 inhibitors and nitrates are contraindicated.

But now, considering these new findings, Dr. Kloner is offering a fresh perspective.

“This study is reassuring,” Dr. Kloner said in an interview. “I think that it’s time to reassess whether there should be an absolute contraindication, or this should be more of like a warning.”

He noted that in controlled studies, like the ones he previously conducted, PDE5 inhibitors and nitrates were administered “very close to each other, on purpose,” yet this probably doesn’t reflect typical practice, in which clinicians can guide usage based on durations of drug metabolism.

“I think that physicians might be more comfortable now prescribing the drugs at the same time, but then telling patients that they shouldn’t take the two drugs simultaneously; they should wait and take the nitrate 24 hours after the last Viagra, or the nitrate 48 hours after the last Cialis,” Dr. Kloner said. “I suspect that that is happening. I suspect also the fact that people would be more likely to take the nitrate in the morning and the PDE5 inhibitor at night probably also contributes to the safety findings.”

Dr. Kloner noted that blood pressures vary throughout the day based on circadian rhythm, and that the body can adapt to some fluctuations without negative effects.

There could still be some people who experience a drop in blood pressure and get sick from it from the two drugs interacting, but that’s probably not that common, he said.

The study was supported by several grants. The investigators disclosed relationships with Merck, BMS, Bayer, and others. Dr. Kloner consults for Sanofi.

As coprescribing drugs for erectile dysfunction and oral organic nitrates for ischemic heart disease (IHD) surged, cardiovascular adverse events did not significantly increase, a new study finds.

The authors of the new research specifically examined how frequently phosphodiesterase type 5 (PDE5) inhibitors, such as Viagra, were prescribed. The U.S. Food and Drug Administration and the European Medicines Agency have warned that these drugs for erectile dysfunction are contraindicated for use with nitrates because of concerns about cardiovascular risks.

“Small, randomized, pharmacologic studies have reported an amplified decrease in blood pressure during controlled coexposure with nitrates and [phosphodiesterase type 5 inhibitors], both in healthy participants and in participants with IHD,” wrote lead author Anders Holt, MD, of Copenhagen University Hospital–Herlev and Gentofte and colleagues, in Annals of Internal Medicine. “Potentially, this increases the risk for vascular ischemic events including myocardial infarction and stroke.”

But there is a scarcity of real-world data showing that using both types of drugs together increase these risks, the researchers noted.

To address this knowledge gap, Dr. Holt and colleagues conducted a retrospective study involving 249,541 Danish men with IHD. In this overall population, from 2000 to 2018, prescriptions for PDE5 inhibitors increased 10-fold, from 3.1 to 30.9 prescriptions per 100 persons per year. Within a subgroup of 42,073 patients continuously prescribed oral organic nitrates, PDE5-inhibitor prescriptions jumped twice that magnitude, from 0.9 to 19.7 prescriptions per 100 persons per year.

Despite this surge in coprescribing, the investigators did not observe a significant increase in either of two composite measures of cardiovascular adverse events. The first composite included ischemic stroke, shock, cardiac arrest, myocardial infarction, or acute coronary arteriography (odds ratio, 0.58; 95% confidence interval, 0.28-1.13). The second composite included drug-related adverse events, angina pectoris, or syncope (OR, 0.73; CI, 0.40-1.32).
 

Lead author speculates on reasons for findings

“I propose several explanations [for these findings],” Dr. Holt said in an interview, “but I want to emphasize that our study does not contain any data to back it up. It is just speculation. First, the observed drop in blood pressure may not cause a condition for which patients seek a hospital. A drop in blood pressure has been shown in pharmacologic trials, but it might not translate to a real-life risk for cardiovascular outcomes. Second, patients could be well informed and adherent to guidance that the prescribing physician has provided. For example, patients are aware of the recommended pause in nitrate treatment before PDE5-inhibitor use and follow these recommendations. Third, nitrates are often taken in the morning, and with the careful assumption that most PDE5-inhibitor activities take place in the evening, the nitrates could be metabolized to a degree such that the synergistic interaction is negligible.”

Dr. Holt went on to suggest a novel clinical approach based on the new findings.

“Coadministration should still be contraindicated due to the proven drop in blood pressure,” he said. “However, perhaps physicians can allow for coprescription if patients are adequately informed.”

A qualitative study is needed to determine how patients and physicians discuss coprescription, including avoidance of coadministration, Dr. Holt added.
 

Findings call for a reassessment of whether the contraindication is warranted

Robert A. Kloner, MD, PhD, chief science officer at the Huntington Medical Research Institutes in Pasadena, Calif., and professor of medicine at University of Southern California, Los Angeles, previously conducted research exploring drug interactions with PDE5 inhibitors, and in 2018, coauthored a literature review that concluded that PDE5 inhibitors and nitrates are contraindicated.

But now, considering these new findings, Dr. Kloner is offering a fresh perspective.

“This study is reassuring,” Dr. Kloner said in an interview. “I think that it’s time to reassess whether there should be an absolute contraindication, or this should be more of like a warning.”

He noted that in controlled studies, like the ones he previously conducted, PDE5 inhibitors and nitrates were administered “very close to each other, on purpose,” yet this probably doesn’t reflect typical practice, in which clinicians can guide usage based on durations of drug metabolism.

“I think that physicians might be more comfortable now prescribing the drugs at the same time, but then telling patients that they shouldn’t take the two drugs simultaneously; they should wait and take the nitrate 24 hours after the last Viagra, or the nitrate 48 hours after the last Cialis,” Dr. Kloner said. “I suspect that that is happening. I suspect also the fact that people would be more likely to take the nitrate in the morning and the PDE5 inhibitor at night probably also contributes to the safety findings.”

Dr. Kloner noted that blood pressures vary throughout the day based on circadian rhythm, and that the body can adapt to some fluctuations without negative effects.

There could still be some people who experience a drop in blood pressure and get sick from it from the two drugs interacting, but that’s probably not that common, he said.

The study was supported by several grants. The investigators disclosed relationships with Merck, BMS, Bayer, and others. Dr. Kloner consults for Sanofi.

As coprescribing drugs for erectile dysfunction and oral organic nitrates for ischemic heart disease (IHD) surged, cardiovascular adverse events did not significantly increase, a new study finds.

The authors of the new research specifically examined how frequently phosphodiesterase type 5 (PDE5) inhibitors, such as Viagra, were prescribed. The U.S. Food and Drug Administration and the European Medicines Agency have warned that these drugs for erectile dysfunction are contraindicated for use with nitrates because of concerns about cardiovascular risks.

“Small, randomized, pharmacologic studies have reported an amplified decrease in blood pressure during controlled coexposure with nitrates and [phosphodiesterase type 5 inhibitors], both in healthy participants and in participants with IHD,” wrote lead author Anders Holt, MD, of Copenhagen University Hospital–Herlev and Gentofte and colleagues, in Annals of Internal Medicine. “Potentially, this increases the risk for vascular ischemic events including myocardial infarction and stroke.”

But there is a scarcity of real-world data showing that using both types of drugs together increase these risks, the researchers noted.

To address this knowledge gap, Dr. Holt and colleagues conducted a retrospective study involving 249,541 Danish men with IHD. In this overall population, from 2000 to 2018, prescriptions for PDE5 inhibitors increased 10-fold, from 3.1 to 30.9 prescriptions per 100 persons per year. Within a subgroup of 42,073 patients continuously prescribed oral organic nitrates, PDE5-inhibitor prescriptions jumped twice that magnitude, from 0.9 to 19.7 prescriptions per 100 persons per year.

Despite this surge in coprescribing, the investigators did not observe a significant increase in either of two composite measures of cardiovascular adverse events. The first composite included ischemic stroke, shock, cardiac arrest, myocardial infarction, or acute coronary arteriography (odds ratio, 0.58; 95% confidence interval, 0.28-1.13). The second composite included drug-related adverse events, angina pectoris, or syncope (OR, 0.73; CI, 0.40-1.32).
 

Lead author speculates on reasons for findings

“I propose several explanations [for these findings],” Dr. Holt said in an interview, “but I want to emphasize that our study does not contain any data to back it up. It is just speculation. First, the observed drop in blood pressure may not cause a condition for which patients seek a hospital. A drop in blood pressure has been shown in pharmacologic trials, but it might not translate to a real-life risk for cardiovascular outcomes. Second, patients could be well informed and adherent to guidance that the prescribing physician has provided. For example, patients are aware of the recommended pause in nitrate treatment before PDE5-inhibitor use and follow these recommendations. Third, nitrates are often taken in the morning, and with the careful assumption that most PDE5-inhibitor activities take place in the evening, the nitrates could be metabolized to a degree such that the synergistic interaction is negligible.”

Dr. Holt went on to suggest a novel clinical approach based on the new findings.

“Coadministration should still be contraindicated due to the proven drop in blood pressure,” he said. “However, perhaps physicians can allow for coprescription if patients are adequately informed.”

A qualitative study is needed to determine how patients and physicians discuss coprescription, including avoidance of coadministration, Dr. Holt added.
 

Findings call for a reassessment of whether the contraindication is warranted

Robert A. Kloner, MD, PhD, chief science officer at the Huntington Medical Research Institutes in Pasadena, Calif., and professor of medicine at University of Southern California, Los Angeles, previously conducted research exploring drug interactions with PDE5 inhibitors, and in 2018, coauthored a literature review that concluded that PDE5 inhibitors and nitrates are contraindicated.

But now, considering these new findings, Dr. Kloner is offering a fresh perspective.

“This study is reassuring,” Dr. Kloner said in an interview. “I think that it’s time to reassess whether there should be an absolute contraindication, or this should be more of like a warning.”

He noted that in controlled studies, like the ones he previously conducted, PDE5 inhibitors and nitrates were administered “very close to each other, on purpose,” yet this probably doesn’t reflect typical practice, in which clinicians can guide usage based on durations of drug metabolism.

“I think that physicians might be more comfortable now prescribing the drugs at the same time, but then telling patients that they shouldn’t take the two drugs simultaneously; they should wait and take the nitrate 24 hours after the last Viagra, or the nitrate 48 hours after the last Cialis,” Dr. Kloner said. “I suspect that that is happening. I suspect also the fact that people would be more likely to take the nitrate in the morning and the PDE5 inhibitor at night probably also contributes to the safety findings.”

Dr. Kloner noted that blood pressures vary throughout the day based on circadian rhythm, and that the body can adapt to some fluctuations without negative effects.

There could still be some people who experience a drop in blood pressure and get sick from it from the two drugs interacting, but that’s probably not that common, he said.

The study was supported by several grants. The investigators disclosed relationships with Merck, BMS, Bayer, and others. Dr. Kloner consults for Sanofi.

Bariatric surgery can reduce the risk of long-term cardiovascular outcomes in older Medicare beneficiaries with obesity, a large new observational study in which a third of the patients were over age 65 years suggests.

Overall, patients who underwent bariatric surgery had 37% lower all-cause mortality and were significantly less likely to have admissions for new-onset heart failure (64% risk reduction), myocardial infarction (37% risk reduction), and ischemic stroke (29% risk reduction), compared with similar patients who received more conservative treatment, after a median of 4 years of follow-up, report Amgad Mentias, MD, MS, a clinical cardiologist at the Cleveland Clinic Foundation, Ohio, and colleagues.

The results were published in the Journal of the American College of Cardiology.

Previous studies on bariatric surgery outcomes have primarily focused on individuals from select health care networks or medical facilities with restricted coverage in the United States or on patients with diabetes, noted Tiffany M. Powell-Wiley, MD, MPH, of the National Institutes of Health’s National Heart, Lung, and Blood Institute, Bethesda, Maryland, and colleagues in an accompanying editorial.

Contemporary cohort of patients

“A lot of the studies showed long-term outcomes outside of the U.S., specifically in Europe,” Dr. Mentias added.

The aim of this study was to evaluate the long-term association between bariatric surgery and risk of adverse cardiovascular outcomes in a contemporary large cohort from the United States.

Older patients (> 65 years) and those without diabetes were looked at as specific subgroups.

The researchers assessed 189,770 patients. There were 94,885 matched patients in each cohort. Mean age was 62.33 years. Female patients comprised 70% of the cohort. The study group had an average BMI of 44.7 kg/m2.

The study cohort was matched 1:1. Participants were either part of a control group with obesity or a group of Medicare beneficiaries who had bariatric surgery between 2013 and 2019. Sex, propensity score matching on 87 clinical variables, age, and BMI were used to match patients.

Myocardial infarction, new-onset heart failure, ischemic stroke, and all-cause mortality were all study outcomes. As a sensitivity analysis, the study team conducted an instrumental variable assessment.

More specifically, the findings showed that bariatric surgery was linked with the following after a median follow-up of 4.0 years:

• Myocardial infarction (hazard ratio, 0.63; 95% confidence interval, 0.59-0.68)
• Stroke (HR, 0.71; 95% CI, 0.65-0.79)
• New-onset heart failure (HR, 0.46; 95% CI, 0.44-0.49)
• Reduced risk of death (9.2 vs. 14.7 per 1000 person-years; HR, 0.63; 95% CI, 0.60-0.66)

Findings for those over the age of 65 were similar – lower risks of all-cause mortality (HR, 0.64), new-onset heart failure (HR, 0.52), myocardial infarction (HR, 0.70), and stroke (HR, 0.76; all P < .001). Similar findings were shown in subgroup analyses in men and women and in patients with and without diabetes.

The study cohort primarily consisted of Medicare patients, which limits the generalizability of the data. Lack of data on medications taken for cardiovascular and weight loss purposes and potential coding errors because the information was gathered from an administrative database were all limitations of the study, the researchers note.

An additional limitation was that residual unmeasured confounders, particularly patient-focused physical, social, and mental support factors, could play a role in whether a patient opted to have bariatric surgery, the study authors note.

“Additional studies are needed to compare cardiovascular outcomes after bariatric surgery with weight loss medications like glucagon-like peptide-1 (GLP-1) analogues,” the researchers add.

This study was partially funded by philanthropic contributions by the Khouri family, Bailey family, and Haslam family to the Cleveland Clinic for co-author Dr. Milind Y. Desai’s research. Dr. Mentias has disclosed no relevant financial relationships. Dr. Powell-Wiley disclosed relationships with the National Institute on Minority Health and Health Disparities and the Division of Intramural Research of the National, Heart, Lung, and Blood Institute of the National Institutes of Health.

A version of this article first appeared on Medscape.com.

Bariatric surgery can reduce the risk of long-term cardiovascular outcomes in older Medicare beneficiaries with obesity, a large new observational study in which a third of the patients were over age 65 years suggests.

Overall, patients who underwent bariatric surgery had 37% lower all-cause mortality and were significantly less likely to have admissions for new-onset heart failure (64% risk reduction), myocardial infarction (37% risk reduction), and ischemic stroke (29% risk reduction), compared with similar patients who received more conservative treatment, after a median of 4 years of follow-up, report Amgad Mentias, MD, MS, a clinical cardiologist at the Cleveland Clinic Foundation, Ohio, and colleagues.

The results were published in the Journal of the American College of Cardiology.

Previous studies on bariatric surgery outcomes have primarily focused on individuals from select health care networks or medical facilities with restricted coverage in the United States or on patients with diabetes, noted Tiffany M. Powell-Wiley, MD, MPH, of the National Institutes of Health’s National Heart, Lung, and Blood Institute, Bethesda, Maryland, and colleagues in an accompanying editorial.

Contemporary cohort of patients

“A lot of the studies showed long-term outcomes outside of the U.S., specifically in Europe,” Dr. Mentias added.

The aim of this study was to evaluate the long-term association between bariatric surgery and risk of adverse cardiovascular outcomes in a contemporary large cohort from the United States.

Older patients (> 65 years) and those without diabetes were looked at as specific subgroups.

The researchers assessed 189,770 patients. There were 94,885 matched patients in each cohort. Mean age was 62.33 years. Female patients comprised 70% of the cohort. The study group had an average BMI of 44.7 kg/m2.

The study cohort was matched 1:1. Participants were either part of a control group with obesity or a group of Medicare beneficiaries who had bariatric surgery between 2013 and 2019. Sex, propensity score matching on 87 clinical variables, age, and BMI were used to match patients.

Myocardial infarction, new-onset heart failure, ischemic stroke, and all-cause mortality were all study outcomes. As a sensitivity analysis, the study team conducted an instrumental variable assessment.

More specifically, the findings showed that bariatric surgery was linked with the following after a median follow-up of 4.0 years:

• Myocardial infarction (hazard ratio, 0.63; 95% confidence interval, 0.59-0.68)
• Stroke (HR, 0.71; 95% CI, 0.65-0.79)
• New-onset heart failure (HR, 0.46; 95% CI, 0.44-0.49)
• Reduced risk of death (9.2 vs. 14.7 per 1000 person-years; HR, 0.63; 95% CI, 0.60-0.66)

Findings for those over the age of 65 were similar – lower risks of all-cause mortality (HR, 0.64), new-onset heart failure (HR, 0.52), myocardial infarction (HR, 0.70), and stroke (HR, 0.76; all P < .001). Similar findings were shown in subgroup analyses in men and women and in patients with and without diabetes.

The study cohort primarily consisted of Medicare patients, which limits the generalizability of the data. Lack of data on medications taken for cardiovascular and weight loss purposes and potential coding errors because the information was gathered from an administrative database were all limitations of the study, the researchers note.

An additional limitation was that residual unmeasured confounders, particularly patient-focused physical, social, and mental support factors, could play a role in whether a patient opted to have bariatric surgery, the study authors note.

“Additional studies are needed to compare cardiovascular outcomes after bariatric surgery with weight loss medications like glucagon-like peptide-1 (GLP-1) analogues,” the researchers add.

This study was partially funded by philanthropic contributions by the Khouri family, Bailey family, and Haslam family to the Cleveland Clinic for co-author Dr. Milind Y. Desai’s research. Dr. Mentias has disclosed no relevant financial relationships. Dr. Powell-Wiley disclosed relationships with the National Institute on Minority Health and Health Disparities and the Division of Intramural Research of the National, Heart, Lung, and Blood Institute of the National Institutes of Health.

A version of this article first appeared on Medscape.com.

Bariatric surgery can reduce the risk of long-term cardiovascular outcomes in older Medicare beneficiaries with obesity, a large new observational study in which a third of the patients were over age 65 years suggests.

Overall, patients who underwent bariatric surgery had 37% lower all-cause mortality and were significantly less likely to have admissions for new-onset heart failure (64% risk reduction), myocardial infarction (37% risk reduction), and ischemic stroke (29% risk reduction), compared with similar patients who received more conservative treatment, after a median of 4 years of follow-up, report Amgad Mentias, MD, MS, a clinical cardiologist at the Cleveland Clinic Foundation, Ohio, and colleagues.

The results were published in the Journal of the American College of Cardiology.

Previous studies on bariatric surgery outcomes have primarily focused on individuals from select health care networks or medical facilities with restricted coverage in the United States or on patients with diabetes, noted Tiffany M. Powell-Wiley, MD, MPH, of the National Institutes of Health’s National Heart, Lung, and Blood Institute, Bethesda, Maryland, and colleagues in an accompanying editorial.

Contemporary cohort of patients

“A lot of the studies showed long-term outcomes outside of the U.S., specifically in Europe,” Dr. Mentias added.

The aim of this study was to evaluate the long-term association between bariatric surgery and risk of adverse cardiovascular outcomes in a contemporary large cohort from the United States.

Older patients (> 65 years) and those without diabetes were looked at as specific subgroups.

The researchers assessed 189,770 patients. There were 94,885 matched patients in each cohort. Mean age was 62.33 years. Female patients comprised 70% of the cohort. The study group had an average BMI of 44.7 kg/m2.

The study cohort was matched 1:1. Participants were either part of a control group with obesity or a group of Medicare beneficiaries who had bariatric surgery between 2013 and 2019. Sex, propensity score matching on 87 clinical variables, age, and BMI were used to match patients.

Myocardial infarction, new-onset heart failure, ischemic stroke, and all-cause mortality were all study outcomes. As a sensitivity analysis, the study team conducted an instrumental variable assessment.

More specifically, the findings showed that bariatric surgery was linked with the following after a median follow-up of 4.0 years:

• Myocardial infarction (hazard ratio, 0.63; 95% confidence interval, 0.59-0.68)
• Stroke (HR, 0.71; 95% CI, 0.65-0.79)
• New-onset heart failure (HR, 0.46; 95% CI, 0.44-0.49)
• Reduced risk of death (9.2 vs. 14.7 per 1000 person-years; HR, 0.63; 95% CI, 0.60-0.66)

Findings for those over the age of 65 were similar – lower risks of all-cause mortality (HR, 0.64), new-onset heart failure (HR, 0.52), myocardial infarction (HR, 0.70), and stroke (HR, 0.76; all P < .001). Similar findings were shown in subgroup analyses in men and women and in patients with and without diabetes.

The study cohort primarily consisted of Medicare patients, which limits the generalizability of the data. Lack of data on medications taken for cardiovascular and weight loss purposes and potential coding errors because the information was gathered from an administrative database were all limitations of the study, the researchers note.

An additional limitation was that residual unmeasured confounders, particularly patient-focused physical, social, and mental support factors, could play a role in whether a patient opted to have bariatric surgery, the study authors note.

“Additional studies are needed to compare cardiovascular outcomes after bariatric surgery with weight loss medications like glucagon-like peptide-1 (GLP-1) analogues,” the researchers add.

This study was partially funded by philanthropic contributions by the Khouri family, Bailey family, and Haslam family to the Cleveland Clinic for co-author Dr. Milind Y. Desai’s research. Dr. Mentias has disclosed no relevant financial relationships. Dr. Powell-Wiley disclosed relationships with the National Institute on Minority Health and Health Disparities and the Division of Intramural Research of the National, Heart, Lung, and Blood Institute of the National Institutes of Health.

A version of this article first appeared on Medscape.com.