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Age-specific cut-offs needed for cardiac troponin tests?
The study shows that the 99th percentile for the upper reference limit (used to define myocardial injury) for high-sensitivity (hs)–troponin T in the new analysis matched those reported by manufacturers. However, the same threshold for hs–troponin I was lower than was manufacturer-reported levels when considering the whole population.
And for both hs–troponin T and hs–troponin I, there were significant differences in 99th percentile levels by age.
“Our data suggest that some cases of myocardial injury may be missed in the whole population by using current non–age specific thresholds of troponin I,” lead author, John McEvoy, MB, University of Galway (Ireland), said in an interview. “If the non–age specific threshold was lowered to that in our cohort, then we would pick up more people with myocardial injury.”
“However,” Dr. McEvoy added, “if age-specific thresholds were deployed, then our data suggest that thresholds used to diagnose myocardial injury would need to be higher in older adults, somewhat lower in middle-aged individuals and much lower in younger people.”
The study was published online in the Journal of the American College of Cardiology.
The authors explain that the 99th percentile upper–reference limit threshold is the common benchmark of abnormality for all troponin assays. Five high-sensitivity cardiac troponin assays have been cleared by the Food and Drug Administration for clinical use and allow for earlier diagnosis of MI.
However, there has been variability in the approach used to define the 99th percentile upper reference limits for these assays, with definitions of healthy reference populations differing and the various assays available are not standardized or harmonized. So troponin concentrations at 99th percentiles do not align across assays, and the generalizability of manufacturer-reported reference upper reference limits for hs-troponin assays to the U.S. adult population is unknown.
They note that though sex-specific 99th percentile upper reference limits for hs-troponin have been recommended since 2018, age-specific thresholds are not yet endorsed, and whether thresholds differ by race or ethnicity is also controversial.
They aimed to investigate these issues using stored serum samples from adults aged 18 or older who participated in the 1999-2004 National Health and Nutrition Examination Survey (NHANES).
Dr. McEvoy described the NHANES database as “the gold standard cohort for representation of the U.S. adult population,” noting that other studies conducted by the manufacturers of the troponin tests have often used convenience samples from patients attending hospital clinics and blood donors, which he said were not representative of the whole population.
For the study, the researchers estimated that the 99th percentile upper reference limit for four hs-troponin assays (one troponin T and three troponin I) in a strictly defined healthy reference subgroup of 2,746 individuals from the NHANES cohort.
Results showed that the NHANES 99th percentile upper reference limit for hs–troponin T (19 ng/L) matched the manufacturer-reported level (19 ng/L). But, the NHANES upper reference levels for three troponin I assays were lower than were levels stated by the manufacturers.
The NHANES levels were 13 ng/L for the Abbott hs–troponin I assay (manufacturer: 28 ng/L); 5 ng/L for the Ortho hs–troponin I assay (manufacturer: 11 ng/L); and 37 ng/L for the Siemens hs–troponin I assay (manufacturer: 46.5 ng/L).
Furthermore, the 99th percentile upper reference limits for all four hs-troponin assays were statistically significantly lower in healthy adults younger than 40 years, compared with healthy adults older than 60 years.
There were also significant differences in upper reference limits by sex, but none by race/ethnicity.
Dr. McEvoy explained that NHANES is a very well phenotyped database with information on individuals’ health, body mass index, and other biomarkers. “This allows us to define a completely healthy subgroup of people, which could explain why the 99th percentile threshold for hs–troponin I was lower than previously reported from other cohorts,” he added.
Though there may be concern that such a healthy subgroup would mean the sample is enriched with younger people, whereas the typical person having their troponin measured would be older, Dr. McEvoy pointed out that there were more than 400 people older than 60 years in the healthy group. “This is probably the biggest cohort of super healthy older U.S. adults ever sampled in this regard,” he commented.
Dr. McEvoy said that the overall results from the study suggested that different thresholds might need to be considered for troponin I. “This could lead to threshold levels used to diagnose myocardial injury being cut in the population as a whole.”
But, he said a more important message was the need for age-specific thresholds.
“We found that troponin levels track with age. Even in individuals who age in a very healthy way, their troponin levels are greater than in younger people. This is the first time this has been shown with such clear statistical significance,” Dr. McEvoy said. “We think this data provides a compelling case for the use of age-specific cut-offs.”
He explained that, if age-specific thresholds were used to diagnose myocardial injury, the cut point from the current data would be higher than it would be from current manufacturers’ recommendations in those older than 60 years, so fewer people in this age group would be labeled as having myocardial injury.
“Our results suggest that, at present, we are seeing more false positives in older people leading to more unnecessary tests.” Using age-specific cut off points will reduce the number of false positives in older people. Dr. McEvoy noted a similar change in the way D-Dimer blood tests have been used to diagnose pulmonary embolism in recent years.
Using age-specific cut-offs for hs-troponin would also reduce the number of false negatives in younger people, Dr. McEvoy added.
Further studies needed?
In an accompanying editorial, Cian McCarthy, MB, Austin Vyas, and James Januzzi, MD, of Massachusetts General Hospital, Boston, note that though there are substantial shortcomings to using the 99th percentile upper reference limit of troponins for the diagnosis of cardiac injury, they believe this measurement should persist as a central component of the MI diagnostic criteria, with the caveat that this is only one component of the definition of MI and does not alone define it.
“Cardiac troponin measurement is one of the most commonly utilized blood tests in hospital-based settings, and yet important questions remain about what exactly is a normal value for this test,” the editorialists comment.
They say this new study emphasizes the importance of age and sex in interpretation of troponin levels.
“Although the use of such cut-offs may further complicate MI diagnostic criteria, this is superseded by the benefits of improved diagnostic accuracy in younger and female patients (a critical health equity step) while reducing MI overdiagnosis in the elderly, with the resultant harms that might follow, adverse psychosocial patient impact, and unnecessary health care expenditure from cascade testing,” they write.
They conclude that further large studies derived from healthy cohorts should be conducted to answer this question in a definitive fashion.
A version of this article first appeared on Medscape.com.
The study shows that the 99th percentile for the upper reference limit (used to define myocardial injury) for high-sensitivity (hs)–troponin T in the new analysis matched those reported by manufacturers. However, the same threshold for hs–troponin I was lower than was manufacturer-reported levels when considering the whole population.
And for both hs–troponin T and hs–troponin I, there were significant differences in 99th percentile levels by age.
“Our data suggest that some cases of myocardial injury may be missed in the whole population by using current non–age specific thresholds of troponin I,” lead author, John McEvoy, MB, University of Galway (Ireland), said in an interview. “If the non–age specific threshold was lowered to that in our cohort, then we would pick up more people with myocardial injury.”
“However,” Dr. McEvoy added, “if age-specific thresholds were deployed, then our data suggest that thresholds used to diagnose myocardial injury would need to be higher in older adults, somewhat lower in middle-aged individuals and much lower in younger people.”
The study was published online in the Journal of the American College of Cardiology.
The authors explain that the 99th percentile upper–reference limit threshold is the common benchmark of abnormality for all troponin assays. Five high-sensitivity cardiac troponin assays have been cleared by the Food and Drug Administration for clinical use and allow for earlier diagnosis of MI.
However, there has been variability in the approach used to define the 99th percentile upper reference limits for these assays, with definitions of healthy reference populations differing and the various assays available are not standardized or harmonized. So troponin concentrations at 99th percentiles do not align across assays, and the generalizability of manufacturer-reported reference upper reference limits for hs-troponin assays to the U.S. adult population is unknown.
They note that though sex-specific 99th percentile upper reference limits for hs-troponin have been recommended since 2018, age-specific thresholds are not yet endorsed, and whether thresholds differ by race or ethnicity is also controversial.
They aimed to investigate these issues using stored serum samples from adults aged 18 or older who participated in the 1999-2004 National Health and Nutrition Examination Survey (NHANES).
Dr. McEvoy described the NHANES database as “the gold standard cohort for representation of the U.S. adult population,” noting that other studies conducted by the manufacturers of the troponin tests have often used convenience samples from patients attending hospital clinics and blood donors, which he said were not representative of the whole population.
For the study, the researchers estimated that the 99th percentile upper reference limit for four hs-troponin assays (one troponin T and three troponin I) in a strictly defined healthy reference subgroup of 2,746 individuals from the NHANES cohort.
Results showed that the NHANES 99th percentile upper reference limit for hs–troponin T (19 ng/L) matched the manufacturer-reported level (19 ng/L). But, the NHANES upper reference levels for three troponin I assays were lower than were levels stated by the manufacturers.
The NHANES levels were 13 ng/L for the Abbott hs–troponin I assay (manufacturer: 28 ng/L); 5 ng/L for the Ortho hs–troponin I assay (manufacturer: 11 ng/L); and 37 ng/L for the Siemens hs–troponin I assay (manufacturer: 46.5 ng/L).
Furthermore, the 99th percentile upper reference limits for all four hs-troponin assays were statistically significantly lower in healthy adults younger than 40 years, compared with healthy adults older than 60 years.
There were also significant differences in upper reference limits by sex, but none by race/ethnicity.
Dr. McEvoy explained that NHANES is a very well phenotyped database with information on individuals’ health, body mass index, and other biomarkers. “This allows us to define a completely healthy subgroup of people, which could explain why the 99th percentile threshold for hs–troponin I was lower than previously reported from other cohorts,” he added.
Though there may be concern that such a healthy subgroup would mean the sample is enriched with younger people, whereas the typical person having their troponin measured would be older, Dr. McEvoy pointed out that there were more than 400 people older than 60 years in the healthy group. “This is probably the biggest cohort of super healthy older U.S. adults ever sampled in this regard,” he commented.
Dr. McEvoy said that the overall results from the study suggested that different thresholds might need to be considered for troponin I. “This could lead to threshold levels used to diagnose myocardial injury being cut in the population as a whole.”
But, he said a more important message was the need for age-specific thresholds.
“We found that troponin levels track with age. Even in individuals who age in a very healthy way, their troponin levels are greater than in younger people. This is the first time this has been shown with such clear statistical significance,” Dr. McEvoy said. “We think this data provides a compelling case for the use of age-specific cut-offs.”
He explained that, if age-specific thresholds were used to diagnose myocardial injury, the cut point from the current data would be higher than it would be from current manufacturers’ recommendations in those older than 60 years, so fewer people in this age group would be labeled as having myocardial injury.
“Our results suggest that, at present, we are seeing more false positives in older people leading to more unnecessary tests.” Using age-specific cut off points will reduce the number of false positives in older people. Dr. McEvoy noted a similar change in the way D-Dimer blood tests have been used to diagnose pulmonary embolism in recent years.
Using age-specific cut-offs for hs-troponin would also reduce the number of false negatives in younger people, Dr. McEvoy added.
Further studies needed?
In an accompanying editorial, Cian McCarthy, MB, Austin Vyas, and James Januzzi, MD, of Massachusetts General Hospital, Boston, note that though there are substantial shortcomings to using the 99th percentile upper reference limit of troponins for the diagnosis of cardiac injury, they believe this measurement should persist as a central component of the MI diagnostic criteria, with the caveat that this is only one component of the definition of MI and does not alone define it.
“Cardiac troponin measurement is one of the most commonly utilized blood tests in hospital-based settings, and yet important questions remain about what exactly is a normal value for this test,” the editorialists comment.
They say this new study emphasizes the importance of age and sex in interpretation of troponin levels.
“Although the use of such cut-offs may further complicate MI diagnostic criteria, this is superseded by the benefits of improved diagnostic accuracy in younger and female patients (a critical health equity step) while reducing MI overdiagnosis in the elderly, with the resultant harms that might follow, adverse psychosocial patient impact, and unnecessary health care expenditure from cascade testing,” they write.
They conclude that further large studies derived from healthy cohorts should be conducted to answer this question in a definitive fashion.
A version of this article first appeared on Medscape.com.
The study shows that the 99th percentile for the upper reference limit (used to define myocardial injury) for high-sensitivity (hs)–troponin T in the new analysis matched those reported by manufacturers. However, the same threshold for hs–troponin I was lower than was manufacturer-reported levels when considering the whole population.
And for both hs–troponin T and hs–troponin I, there were significant differences in 99th percentile levels by age.
“Our data suggest that some cases of myocardial injury may be missed in the whole population by using current non–age specific thresholds of troponin I,” lead author, John McEvoy, MB, University of Galway (Ireland), said in an interview. “If the non–age specific threshold was lowered to that in our cohort, then we would pick up more people with myocardial injury.”
“However,” Dr. McEvoy added, “if age-specific thresholds were deployed, then our data suggest that thresholds used to diagnose myocardial injury would need to be higher in older adults, somewhat lower in middle-aged individuals and much lower in younger people.”
The study was published online in the Journal of the American College of Cardiology.
The authors explain that the 99th percentile upper–reference limit threshold is the common benchmark of abnormality for all troponin assays. Five high-sensitivity cardiac troponin assays have been cleared by the Food and Drug Administration for clinical use and allow for earlier diagnosis of MI.
However, there has been variability in the approach used to define the 99th percentile upper reference limits for these assays, with definitions of healthy reference populations differing and the various assays available are not standardized or harmonized. So troponin concentrations at 99th percentiles do not align across assays, and the generalizability of manufacturer-reported reference upper reference limits for hs-troponin assays to the U.S. adult population is unknown.
They note that though sex-specific 99th percentile upper reference limits for hs-troponin have been recommended since 2018, age-specific thresholds are not yet endorsed, and whether thresholds differ by race or ethnicity is also controversial.
They aimed to investigate these issues using stored serum samples from adults aged 18 or older who participated in the 1999-2004 National Health and Nutrition Examination Survey (NHANES).
Dr. McEvoy described the NHANES database as “the gold standard cohort for representation of the U.S. adult population,” noting that other studies conducted by the manufacturers of the troponin tests have often used convenience samples from patients attending hospital clinics and blood donors, which he said were not representative of the whole population.
For the study, the researchers estimated that the 99th percentile upper reference limit for four hs-troponin assays (one troponin T and three troponin I) in a strictly defined healthy reference subgroup of 2,746 individuals from the NHANES cohort.
Results showed that the NHANES 99th percentile upper reference limit for hs–troponin T (19 ng/L) matched the manufacturer-reported level (19 ng/L). But, the NHANES upper reference levels for three troponin I assays were lower than were levels stated by the manufacturers.
The NHANES levels were 13 ng/L for the Abbott hs–troponin I assay (manufacturer: 28 ng/L); 5 ng/L for the Ortho hs–troponin I assay (manufacturer: 11 ng/L); and 37 ng/L for the Siemens hs–troponin I assay (manufacturer: 46.5 ng/L).
Furthermore, the 99th percentile upper reference limits for all four hs-troponin assays were statistically significantly lower in healthy adults younger than 40 years, compared with healthy adults older than 60 years.
There were also significant differences in upper reference limits by sex, but none by race/ethnicity.
Dr. McEvoy explained that NHANES is a very well phenotyped database with information on individuals’ health, body mass index, and other biomarkers. “This allows us to define a completely healthy subgroup of people, which could explain why the 99th percentile threshold for hs–troponin I was lower than previously reported from other cohorts,” he added.
Though there may be concern that such a healthy subgroup would mean the sample is enriched with younger people, whereas the typical person having their troponin measured would be older, Dr. McEvoy pointed out that there were more than 400 people older than 60 years in the healthy group. “This is probably the biggest cohort of super healthy older U.S. adults ever sampled in this regard,” he commented.
Dr. McEvoy said that the overall results from the study suggested that different thresholds might need to be considered for troponin I. “This could lead to threshold levels used to diagnose myocardial injury being cut in the population as a whole.”
But, he said a more important message was the need for age-specific thresholds.
“We found that troponin levels track with age. Even in individuals who age in a very healthy way, their troponin levels are greater than in younger people. This is the first time this has been shown with such clear statistical significance,” Dr. McEvoy said. “We think this data provides a compelling case for the use of age-specific cut-offs.”
He explained that, if age-specific thresholds were used to diagnose myocardial injury, the cut point from the current data would be higher than it would be from current manufacturers’ recommendations in those older than 60 years, so fewer people in this age group would be labeled as having myocardial injury.
“Our results suggest that, at present, we are seeing more false positives in older people leading to more unnecessary tests.” Using age-specific cut off points will reduce the number of false positives in older people. Dr. McEvoy noted a similar change in the way D-Dimer blood tests have been used to diagnose pulmonary embolism in recent years.
Using age-specific cut-offs for hs-troponin would also reduce the number of false negatives in younger people, Dr. McEvoy added.
Further studies needed?
In an accompanying editorial, Cian McCarthy, MB, Austin Vyas, and James Januzzi, MD, of Massachusetts General Hospital, Boston, note that though there are substantial shortcomings to using the 99th percentile upper reference limit of troponins for the diagnosis of cardiac injury, they believe this measurement should persist as a central component of the MI diagnostic criteria, with the caveat that this is only one component of the definition of MI and does not alone define it.
“Cardiac troponin measurement is one of the most commonly utilized blood tests in hospital-based settings, and yet important questions remain about what exactly is a normal value for this test,” the editorialists comment.
They say this new study emphasizes the importance of age and sex in interpretation of troponin levels.
“Although the use of such cut-offs may further complicate MI diagnostic criteria, this is superseded by the benefits of improved diagnostic accuracy in younger and female patients (a critical health equity step) while reducing MI overdiagnosis in the elderly, with the resultant harms that might follow, adverse psychosocial patient impact, and unnecessary health care expenditure from cascade testing,” they write.
They conclude that further large studies derived from healthy cohorts should be conducted to answer this question in a definitive fashion.
A version of this article first appeared on Medscape.com.
FROM JACC
Cardiovascular disease deaths rise on and after high-pollution days
Cardiovascular disease deaths were significantly more common on days of high pollution and for the following 2 days, compared with other days, based on data from nearly 88,000 deaths over a 5-year period.
Previous research has shown the harmful effect of air pollution on human health in highly polluted areas, but Eastern Poland, a region with so-called “Polish smog” has exceptionally high levels of pollution. However, the specific impact of Polish smog, caused primarily by burning coal, on cardiovascular disease (CVD) mortality has not been well studied, said Michal Swieczkowski, MD, of the Medical University of Bialystok (Poland) in a presentation at the annual congress of the European Association of Preventive Cardiology.
Dr. Swieczkowski and colleagues reviewed all-cause deaths from five main cities in Eastern Poland during 2016-2020 for associations with pollution levels and days when deaths occurred. Mortality data were obtained from the Central Statistical Office. Air pollution concentrations for two types of particulate matter (PM2.5, PM10) and nitrogen oxide were collected from the Voivodeship Inspectorate for Environmental Protection. The main sources of the pollutants were road traffic and household heaters using coal or wood.
The final analysis included nearly 6 million person-years of follow-up. The researchers used a time-stratified case-crossover design. For each participant, the researchers compared levels of each pollutant on the day of the week a death occurred (such as a Wednesday) with pollutant levels on the same day of the week without any deaths in the same month (the remaining Wednesdays of that month). This design eliminated the potential confounding effects of participant characteristics, including other cardiovascular risk factors such as smoking and hyperlipidemia, and time trends. Essentially, participants “served as their own controls,” Dr. Swieczkowski said. The researchers conducted similar analyses for pollution levels 1 day and 2 days before a death occurred.
Overall, 87,990 deaths were identified during the study period; of these, 34,907 were from CVD, 9,688 from acute coronary syndromes, and 3,776 from ischemic stroke.
“Exposure to PM2.5 and PM10 was associated with increased mortality on the day of exposure, the next day, and up to 2 days after exposure,” said Dr. Swieczkowski.
Overall, an increase of 10 mcg/m3 in the three pollutants was significantly associated with increase in CVD mortality on the day of exposure to the increased pollution levels, with odds ratios of 1.034, 1.033, and 1.083 for PM2.5, PM10, and NO2, respectively (all P < .001).
The risks of dying from CVD were similar 1 and 2 days after the polluted day.
An increase in PM levels, but not NO2, was significantly associated with acute coronary syndrome (ACS) on the day of exposure to increased pollutants (ORs, 1.029 for PM2.5 [P = .002] and 1.015 [P = .049] for PM10). Both ischemic stroke and ACS mortality were significantly higher at 1 day after exposure, compared with other days. Ischemic stroke was associated with increases in PM2.5 and PM10, while ACS was associated with increases in PM2.5, PM10, and NO2.
When stratified by gender, the effects were more noticeable in women, Dr. Swieczkowski said. “Exposure to both types of particulate caused increased mortality due to acute coronary syndrome as well as ischemic stroke.” Among men, only death from acute coronary syndrome was significantly associated with exposure to increased particulate matter.
In a head-to-head comparison, women were more vulnerable to air pollution by up to 2.5%, he added.
When stratified by age, the effects of all three pollutants were associated with increased risk of death from ischemic stroke and ACS in participants older than 65 years. For those aged 65 years and younger, the only significant association was between ACS-associated mortality and ischemic stroke.
The results suggest “a special need for developing calculators to estimate the risk of CVD incidence depending on the place of residence that could be used for everyday practice,” said Dr. Swieczkowski. “Systemic changes should become a priority for policy makers, and, simultaneously, we as physicians should educate and protect our patients, especially those with high risk of cardiovascular disease,” he said.
Gender differences rooted in anatomy
When asked for an explanation of the difference in the impact of pollution on mortality between men and women, Dr. Swieczkowski explained that women are likely more vulnerable because of differences in anatomy of the pharynx and larynx, and breathing patterns. Previous studies have shown that air pollution causes more oxidative stress in women. Also, in the current study, the mean age of the women was 8 to 9 years older, he said.
The study design was an “elegant way to take away the impact of other cardiovascular risk factors,” noted session moderator Maryam Kavousi, MD, of Erasmus University Medical Center, Rotterdam, the Netherlands.
The study was supported by the National Science Centre, Poland. The researchers had no financial conflicts to disclose.
Cardiovascular disease deaths were significantly more common on days of high pollution and for the following 2 days, compared with other days, based on data from nearly 88,000 deaths over a 5-year period.
Previous research has shown the harmful effect of air pollution on human health in highly polluted areas, but Eastern Poland, a region with so-called “Polish smog” has exceptionally high levels of pollution. However, the specific impact of Polish smog, caused primarily by burning coal, on cardiovascular disease (CVD) mortality has not been well studied, said Michal Swieczkowski, MD, of the Medical University of Bialystok (Poland) in a presentation at the annual congress of the European Association of Preventive Cardiology.
Dr. Swieczkowski and colleagues reviewed all-cause deaths from five main cities in Eastern Poland during 2016-2020 for associations with pollution levels and days when deaths occurred. Mortality data were obtained from the Central Statistical Office. Air pollution concentrations for two types of particulate matter (PM2.5, PM10) and nitrogen oxide were collected from the Voivodeship Inspectorate for Environmental Protection. The main sources of the pollutants were road traffic and household heaters using coal or wood.
The final analysis included nearly 6 million person-years of follow-up. The researchers used a time-stratified case-crossover design. For each participant, the researchers compared levels of each pollutant on the day of the week a death occurred (such as a Wednesday) with pollutant levels on the same day of the week without any deaths in the same month (the remaining Wednesdays of that month). This design eliminated the potential confounding effects of participant characteristics, including other cardiovascular risk factors such as smoking and hyperlipidemia, and time trends. Essentially, participants “served as their own controls,” Dr. Swieczkowski said. The researchers conducted similar analyses for pollution levels 1 day and 2 days before a death occurred.
Overall, 87,990 deaths were identified during the study period; of these, 34,907 were from CVD, 9,688 from acute coronary syndromes, and 3,776 from ischemic stroke.
“Exposure to PM2.5 and PM10 was associated with increased mortality on the day of exposure, the next day, and up to 2 days after exposure,” said Dr. Swieczkowski.
Overall, an increase of 10 mcg/m3 in the three pollutants was significantly associated with increase in CVD mortality on the day of exposure to the increased pollution levels, with odds ratios of 1.034, 1.033, and 1.083 for PM2.5, PM10, and NO2, respectively (all P < .001).
The risks of dying from CVD were similar 1 and 2 days after the polluted day.
An increase in PM levels, but not NO2, was significantly associated with acute coronary syndrome (ACS) on the day of exposure to increased pollutants (ORs, 1.029 for PM2.5 [P = .002] and 1.015 [P = .049] for PM10). Both ischemic stroke and ACS mortality were significantly higher at 1 day after exposure, compared with other days. Ischemic stroke was associated with increases in PM2.5 and PM10, while ACS was associated with increases in PM2.5, PM10, and NO2.
When stratified by gender, the effects were more noticeable in women, Dr. Swieczkowski said. “Exposure to both types of particulate caused increased mortality due to acute coronary syndrome as well as ischemic stroke.” Among men, only death from acute coronary syndrome was significantly associated with exposure to increased particulate matter.
In a head-to-head comparison, women were more vulnerable to air pollution by up to 2.5%, he added.
When stratified by age, the effects of all three pollutants were associated with increased risk of death from ischemic stroke and ACS in participants older than 65 years. For those aged 65 years and younger, the only significant association was between ACS-associated mortality and ischemic stroke.
The results suggest “a special need for developing calculators to estimate the risk of CVD incidence depending on the place of residence that could be used for everyday practice,” said Dr. Swieczkowski. “Systemic changes should become a priority for policy makers, and, simultaneously, we as physicians should educate and protect our patients, especially those with high risk of cardiovascular disease,” he said.
Gender differences rooted in anatomy
When asked for an explanation of the difference in the impact of pollution on mortality between men and women, Dr. Swieczkowski explained that women are likely more vulnerable because of differences in anatomy of the pharynx and larynx, and breathing patterns. Previous studies have shown that air pollution causes more oxidative stress in women. Also, in the current study, the mean age of the women was 8 to 9 years older, he said.
The study design was an “elegant way to take away the impact of other cardiovascular risk factors,” noted session moderator Maryam Kavousi, MD, of Erasmus University Medical Center, Rotterdam, the Netherlands.
The study was supported by the National Science Centre, Poland. The researchers had no financial conflicts to disclose.
Cardiovascular disease deaths were significantly more common on days of high pollution and for the following 2 days, compared with other days, based on data from nearly 88,000 deaths over a 5-year period.
Previous research has shown the harmful effect of air pollution on human health in highly polluted areas, but Eastern Poland, a region with so-called “Polish smog” has exceptionally high levels of pollution. However, the specific impact of Polish smog, caused primarily by burning coal, on cardiovascular disease (CVD) mortality has not been well studied, said Michal Swieczkowski, MD, of the Medical University of Bialystok (Poland) in a presentation at the annual congress of the European Association of Preventive Cardiology.
Dr. Swieczkowski and colleagues reviewed all-cause deaths from five main cities in Eastern Poland during 2016-2020 for associations with pollution levels and days when deaths occurred. Mortality data were obtained from the Central Statistical Office. Air pollution concentrations for two types of particulate matter (PM2.5, PM10) and nitrogen oxide were collected from the Voivodeship Inspectorate for Environmental Protection. The main sources of the pollutants were road traffic and household heaters using coal or wood.
The final analysis included nearly 6 million person-years of follow-up. The researchers used a time-stratified case-crossover design. For each participant, the researchers compared levels of each pollutant on the day of the week a death occurred (such as a Wednesday) with pollutant levels on the same day of the week without any deaths in the same month (the remaining Wednesdays of that month). This design eliminated the potential confounding effects of participant characteristics, including other cardiovascular risk factors such as smoking and hyperlipidemia, and time trends. Essentially, participants “served as their own controls,” Dr. Swieczkowski said. The researchers conducted similar analyses for pollution levels 1 day and 2 days before a death occurred.
Overall, 87,990 deaths were identified during the study period; of these, 34,907 were from CVD, 9,688 from acute coronary syndromes, and 3,776 from ischemic stroke.
“Exposure to PM2.5 and PM10 was associated with increased mortality on the day of exposure, the next day, and up to 2 days after exposure,” said Dr. Swieczkowski.
Overall, an increase of 10 mcg/m3 in the three pollutants was significantly associated with increase in CVD mortality on the day of exposure to the increased pollution levels, with odds ratios of 1.034, 1.033, and 1.083 for PM2.5, PM10, and NO2, respectively (all P < .001).
The risks of dying from CVD were similar 1 and 2 days after the polluted day.
An increase in PM levels, but not NO2, was significantly associated with acute coronary syndrome (ACS) on the day of exposure to increased pollutants (ORs, 1.029 for PM2.5 [P = .002] and 1.015 [P = .049] for PM10). Both ischemic stroke and ACS mortality were significantly higher at 1 day after exposure, compared with other days. Ischemic stroke was associated with increases in PM2.5 and PM10, while ACS was associated with increases in PM2.5, PM10, and NO2.
When stratified by gender, the effects were more noticeable in women, Dr. Swieczkowski said. “Exposure to both types of particulate caused increased mortality due to acute coronary syndrome as well as ischemic stroke.” Among men, only death from acute coronary syndrome was significantly associated with exposure to increased particulate matter.
In a head-to-head comparison, women were more vulnerable to air pollution by up to 2.5%, he added.
When stratified by age, the effects of all three pollutants were associated with increased risk of death from ischemic stroke and ACS in participants older than 65 years. For those aged 65 years and younger, the only significant association was between ACS-associated mortality and ischemic stroke.
The results suggest “a special need for developing calculators to estimate the risk of CVD incidence depending on the place of residence that could be used for everyday practice,” said Dr. Swieczkowski. “Systemic changes should become a priority for policy makers, and, simultaneously, we as physicians should educate and protect our patients, especially those with high risk of cardiovascular disease,” he said.
Gender differences rooted in anatomy
When asked for an explanation of the difference in the impact of pollution on mortality between men and women, Dr. Swieczkowski explained that women are likely more vulnerable because of differences in anatomy of the pharynx and larynx, and breathing patterns. Previous studies have shown that air pollution causes more oxidative stress in women. Also, in the current study, the mean age of the women was 8 to 9 years older, he said.
The study design was an “elegant way to take away the impact of other cardiovascular risk factors,” noted session moderator Maryam Kavousi, MD, of Erasmus University Medical Center, Rotterdam, the Netherlands.
The study was supported by the National Science Centre, Poland. The researchers had no financial conflicts to disclose.
FROM ESC CONGRESS 2023
Antiphospholipid antibodies linked to future CV events
The presence of antiphospholipid antibodies is associated with an increased risk for future cardiovascular events, according to a new study.
The findings point to possible new approaches to risk stratification and the potential for new therapeutic targets in heart disease.
“In this study of the general population, we found that two antiphospholipid antibodies were associated with an increased risk of having a serious cardiovascular event over a follow-up of 8 years,” coauthor Jason Knight, MD, University of Michigan, Ann Arbor, said in an interview.
“If confirmed in further studies, these findings could be used to identify a subgroup of patients who need more careful monitoring and more aggressive risk-factor modification, and if the increased risk linked to these antibodies is high enough, it may also justify preemptive treatments such as the anticoagulants that are routinely used in antiphospholipid syndrome,” Dr. Knight said.
“The long-term vision is that we may identify some people in the general population who would benefit from treating the immune system for the prevention and treatment of cardiovascular disease instead of, or in addition to, using typical cardiovascular medications,” he added.
The study was published online in JAMA Network Open.
Individuals with autoimmune and inflammatory diseases have a greater risk for cardiovascular events than expected based on traditional cardiovascular risk factors, with mechanisms proposed to explain this risk including inflammation-mediated disruption of vascular integrity and activation of platelets and coagulation pathways, the authors explained. However, the role of autoantibodies remains unclear.
They noted that antiphospholipid antibodies can activate endothelial cells, platelets, and neutrophils, and some patients with persistently circulating antiphospholipid antibodies can develop antiphospholipid syndrome – an acquired thromboinflammatory disease characterized by arterial, venous, and microvascular thrombotic events and obstetric complications.
Cross-sectional studies have shown that antiphospholipid antibodies are acutely present in up to 17.4% of patients with stroke or transient ischemic attack, and small cohort studies have suggested that such antibodies may be present in 1%-12% of seemingly healthy individuals. However, the impact of sex, race, and ethnicity on the prevalence of antiphospholipid antibodies and their association with atherosclerotic cardiovascular disease is not known.
The researchers conducted the current study to look at the association between antiphospholipid antibodies and future risk for atherosclerotic cardiovascular events.
They analyzed data from 2,427 participants in the population-based Dallas Heart Study who had no history of atherosclerotic cardiovascular disease or autoimmune diseases requiring immunosuppressive medications at the time of blood sampling at study entry in 2007-2009.
Eight different types of antiphospholipid antibodies were measured, and data on cardiovascular events over the next 8 years was recorded.
Results showed that 14.5% of the cohort tested positive for one of these antiphospholipid antibodies at the start of the study, with approximately one-third of those detected at a moderate or high titer.
The researchers also found that the IgA isotypes of two antiphospholipid antibodies – anticardiolipin and anti-beta-2 glycoprotein – were associated with future atherosclerotic cardiovascular events.
After adjustment for other known risk factors, individuals testing positive for the IgA isotype of anticardiolipin had an almost five times increased risk (hazard ratio, 4.92) of the primary endpoint (myocardial infarction, stroke, coronary revascularization, or cardiovascular death); while those testing positive for anti–beta2-glycoprotein had an almost three times increased risk (HR, 2.91).
Furthermore, there was what appeared to be a dose effect. People with the highest levels of these antibodies also had the highest risk for cardiovascular events, with up to an almost 10-fold increased risk with the higher level of anticardiolipin.
Dr. Knight said that more research into the IgA isotypes of these antiphospholipid antibodies is needed.
“Most of the mechanistic work in the antiphospholipid syndrome field has focused on IgG antiphospholipid antibodies. While we commonly find these IgA antibodies in patients with APS, the extent to which they contribute to disease has not been firmly established,” he said. “The fact that IgA was the primary hit in our unbiased screen suggests that there is more to the story and we need to better understand the implications of having these antibodies in circulation, and what specific problems they may be causing.”
Noting that antiphospholipid antibodies can form transiently after certain situations, such as infections, Dr. Knight said that further studies were needed with repeat blood testing to detect the chronic presence of the antibodies.
He added that information of venous thromboses was not available in this study and “perhaps some of the other antibodies might have stood out if we were able to analyze for different outcomes.”
This study was supported by a Pfizer Aspire Award. Dr. Knight reported receiving research funding and consulting fees from Jazz Pharmaceuticals outside the submitted work.
A version of this article first appeared on Medscape.com.
The presence of antiphospholipid antibodies is associated with an increased risk for future cardiovascular events, according to a new study.
The findings point to possible new approaches to risk stratification and the potential for new therapeutic targets in heart disease.
“In this study of the general population, we found that two antiphospholipid antibodies were associated with an increased risk of having a serious cardiovascular event over a follow-up of 8 years,” coauthor Jason Knight, MD, University of Michigan, Ann Arbor, said in an interview.
“If confirmed in further studies, these findings could be used to identify a subgroup of patients who need more careful monitoring and more aggressive risk-factor modification, and if the increased risk linked to these antibodies is high enough, it may also justify preemptive treatments such as the anticoagulants that are routinely used in antiphospholipid syndrome,” Dr. Knight said.
“The long-term vision is that we may identify some people in the general population who would benefit from treating the immune system for the prevention and treatment of cardiovascular disease instead of, or in addition to, using typical cardiovascular medications,” he added.
The study was published online in JAMA Network Open.
Individuals with autoimmune and inflammatory diseases have a greater risk for cardiovascular events than expected based on traditional cardiovascular risk factors, with mechanisms proposed to explain this risk including inflammation-mediated disruption of vascular integrity and activation of platelets and coagulation pathways, the authors explained. However, the role of autoantibodies remains unclear.
They noted that antiphospholipid antibodies can activate endothelial cells, platelets, and neutrophils, and some patients with persistently circulating antiphospholipid antibodies can develop antiphospholipid syndrome – an acquired thromboinflammatory disease characterized by arterial, venous, and microvascular thrombotic events and obstetric complications.
Cross-sectional studies have shown that antiphospholipid antibodies are acutely present in up to 17.4% of patients with stroke or transient ischemic attack, and small cohort studies have suggested that such antibodies may be present in 1%-12% of seemingly healthy individuals. However, the impact of sex, race, and ethnicity on the prevalence of antiphospholipid antibodies and their association with atherosclerotic cardiovascular disease is not known.
The researchers conducted the current study to look at the association between antiphospholipid antibodies and future risk for atherosclerotic cardiovascular events.
They analyzed data from 2,427 participants in the population-based Dallas Heart Study who had no history of atherosclerotic cardiovascular disease or autoimmune diseases requiring immunosuppressive medications at the time of blood sampling at study entry in 2007-2009.
Eight different types of antiphospholipid antibodies were measured, and data on cardiovascular events over the next 8 years was recorded.
Results showed that 14.5% of the cohort tested positive for one of these antiphospholipid antibodies at the start of the study, with approximately one-third of those detected at a moderate or high titer.
The researchers also found that the IgA isotypes of two antiphospholipid antibodies – anticardiolipin and anti-beta-2 glycoprotein – were associated with future atherosclerotic cardiovascular events.
After adjustment for other known risk factors, individuals testing positive for the IgA isotype of anticardiolipin had an almost five times increased risk (hazard ratio, 4.92) of the primary endpoint (myocardial infarction, stroke, coronary revascularization, or cardiovascular death); while those testing positive for anti–beta2-glycoprotein had an almost three times increased risk (HR, 2.91).
Furthermore, there was what appeared to be a dose effect. People with the highest levels of these antibodies also had the highest risk for cardiovascular events, with up to an almost 10-fold increased risk with the higher level of anticardiolipin.
Dr. Knight said that more research into the IgA isotypes of these antiphospholipid antibodies is needed.
“Most of the mechanistic work in the antiphospholipid syndrome field has focused on IgG antiphospholipid antibodies. While we commonly find these IgA antibodies in patients with APS, the extent to which they contribute to disease has not been firmly established,” he said. “The fact that IgA was the primary hit in our unbiased screen suggests that there is more to the story and we need to better understand the implications of having these antibodies in circulation, and what specific problems they may be causing.”
Noting that antiphospholipid antibodies can form transiently after certain situations, such as infections, Dr. Knight said that further studies were needed with repeat blood testing to detect the chronic presence of the antibodies.
He added that information of venous thromboses was not available in this study and “perhaps some of the other antibodies might have stood out if we were able to analyze for different outcomes.”
This study was supported by a Pfizer Aspire Award. Dr. Knight reported receiving research funding and consulting fees from Jazz Pharmaceuticals outside the submitted work.
A version of this article first appeared on Medscape.com.
The presence of antiphospholipid antibodies is associated with an increased risk for future cardiovascular events, according to a new study.
The findings point to possible new approaches to risk stratification and the potential for new therapeutic targets in heart disease.
“In this study of the general population, we found that two antiphospholipid antibodies were associated with an increased risk of having a serious cardiovascular event over a follow-up of 8 years,” coauthor Jason Knight, MD, University of Michigan, Ann Arbor, said in an interview.
“If confirmed in further studies, these findings could be used to identify a subgroup of patients who need more careful monitoring and more aggressive risk-factor modification, and if the increased risk linked to these antibodies is high enough, it may also justify preemptive treatments such as the anticoagulants that are routinely used in antiphospholipid syndrome,” Dr. Knight said.
“The long-term vision is that we may identify some people in the general population who would benefit from treating the immune system for the prevention and treatment of cardiovascular disease instead of, or in addition to, using typical cardiovascular medications,” he added.
The study was published online in JAMA Network Open.
Individuals with autoimmune and inflammatory diseases have a greater risk for cardiovascular events than expected based on traditional cardiovascular risk factors, with mechanisms proposed to explain this risk including inflammation-mediated disruption of vascular integrity and activation of platelets and coagulation pathways, the authors explained. However, the role of autoantibodies remains unclear.
They noted that antiphospholipid antibodies can activate endothelial cells, platelets, and neutrophils, and some patients with persistently circulating antiphospholipid antibodies can develop antiphospholipid syndrome – an acquired thromboinflammatory disease characterized by arterial, venous, and microvascular thrombotic events and obstetric complications.
Cross-sectional studies have shown that antiphospholipid antibodies are acutely present in up to 17.4% of patients with stroke or transient ischemic attack, and small cohort studies have suggested that such antibodies may be present in 1%-12% of seemingly healthy individuals. However, the impact of sex, race, and ethnicity on the prevalence of antiphospholipid antibodies and their association with atherosclerotic cardiovascular disease is not known.
The researchers conducted the current study to look at the association between antiphospholipid antibodies and future risk for atherosclerotic cardiovascular events.
They analyzed data from 2,427 participants in the population-based Dallas Heart Study who had no history of atherosclerotic cardiovascular disease or autoimmune diseases requiring immunosuppressive medications at the time of blood sampling at study entry in 2007-2009.
Eight different types of antiphospholipid antibodies were measured, and data on cardiovascular events over the next 8 years was recorded.
Results showed that 14.5% of the cohort tested positive for one of these antiphospholipid antibodies at the start of the study, with approximately one-third of those detected at a moderate or high titer.
The researchers also found that the IgA isotypes of two antiphospholipid antibodies – anticardiolipin and anti-beta-2 glycoprotein – were associated with future atherosclerotic cardiovascular events.
After adjustment for other known risk factors, individuals testing positive for the IgA isotype of anticardiolipin had an almost five times increased risk (hazard ratio, 4.92) of the primary endpoint (myocardial infarction, stroke, coronary revascularization, or cardiovascular death); while those testing positive for anti–beta2-glycoprotein had an almost three times increased risk (HR, 2.91).
Furthermore, there was what appeared to be a dose effect. People with the highest levels of these antibodies also had the highest risk for cardiovascular events, with up to an almost 10-fold increased risk with the higher level of anticardiolipin.
Dr. Knight said that more research into the IgA isotypes of these antiphospholipid antibodies is needed.
“Most of the mechanistic work in the antiphospholipid syndrome field has focused on IgG antiphospholipid antibodies. While we commonly find these IgA antibodies in patients with APS, the extent to which they contribute to disease has not been firmly established,” he said. “The fact that IgA was the primary hit in our unbiased screen suggests that there is more to the story and we need to better understand the implications of having these antibodies in circulation, and what specific problems they may be causing.”
Noting that antiphospholipid antibodies can form transiently after certain situations, such as infections, Dr. Knight said that further studies were needed with repeat blood testing to detect the chronic presence of the antibodies.
He added that information of venous thromboses was not available in this study and “perhaps some of the other antibodies might have stood out if we were able to analyze for different outcomes.”
This study was supported by a Pfizer Aspire Award. Dr. Knight reported receiving research funding and consulting fees from Jazz Pharmaceuticals outside the submitted work.
A version of this article first appeared on Medscape.com.
FROM JAMA NETWORK OPEN
Some diets better than others for heart protection
In an analysis of randomized trials, the Mediterranean diet and low-fat diets were linked to reduced risks of all-cause mortality and nonfatal MI over 3 years in adults at increased risk for cardiovascular disease (CVD), while the Mediterranean diet also showed lower risk of stroke.
Five other popular diets appeared to have little or no benefit with regard to these outcomes.
“These findings with data presentations are extremely important for patients who are skeptical about the desirability of diet change,” wrote the authors, led by Giorgio Karam, a medical student at the University of Manitoba, Winnipeg.
The results were published online in The BMJ.
Dietary guidelines recommend various diets along with physical activity or other cointerventions for adults at increased CVD risk, but they are often based on low-certainty evidence from nonrandomized studies and on surrogate outcomes.
Several meta-analyses of randomized controlled trials with mortality and major CV outcomes have reported benefits of some dietary programs, but those studies did not use network meta-analysis to give absolute estimates and certainty of estimates for adults at intermediate and high risk, the authors noted.
For this study, Mr. Karam and colleagues conducted a comprehensive systematic review and network meta-analysis in which they compared the effects of seven popular structured diets on mortality and CVD events for adults with CVD or CVD risk factors.
The seven diet plans were the Mediterranean, low fat, very low fat, modified fat, combined low fat and low sodium, Ornish, and Pritikin diets. Data for the analysis came from 40 randomized controlled trials that involved 35,548 participants who were followed for an average of 3 years.
There was evidence of “moderate” certainty that the Mediterranean diet was superior to minimal intervention for all-cause mortality (odds ratio [OR], 0.72), CV mortality (OR, 0.55), stroke (OR, 0.65), and nonfatal MI (OR, 0.48).
On an absolute basis (per 1,000 over 5 years), the Mediterranean diet let to 17 fewer deaths from any cause, 13 fewer CV deaths, seven fewer strokes, and 17 fewer nonfatal MIs.
There was evidence of moderate certainty that a low-fat diet was superior to minimal intervention for prevention of all-cause mortality (OR, 0.84; nine fewer deaths per 1,000) and nonfatal MI (OR, 0.77; seven fewer deaths per 1,000). The low-fat diet had little to no benefit with regard to stroke reduction.
The Mediterranean diet was not “convincingly” superior to a low-fat diet for mortality or nonfatal MI, the authors noted.
The absolute effects for the Mediterranean and low-fat diets were more pronounced in adults at high CVD risk. With the Mediterranean diet, there were 36 fewer all-cause deaths and 39 fewer CV deaths per 1,000 over 5 years.
The five other dietary programs generally had “little or no benefit” compared with minimal intervention. The evidence was of low to moderate certainty.
The studies did not provide enough data to gauge the impact of the diets on angina, heart failure, peripheral vascular events, and atrial fibrillation.
The researchers say that strengths of their analysis include a comprehensive review and thorough literature search and a rigorous assessment of study bias. In addition, the researchers adhered to recognized GRADE methods for assessing the certainty of estimates.
Limitations of their work include not being able to measure adherence to dietary programs and the possibility that some of the benefits may have been due to other factors, such as drug treatment and support for quitting smoking.
The study had no specific funding. The authors have disclosed no relevant financial relationships.
A version of this article originally appeared on Medscape.com.
In an analysis of randomized trials, the Mediterranean diet and low-fat diets were linked to reduced risks of all-cause mortality and nonfatal MI over 3 years in adults at increased risk for cardiovascular disease (CVD), while the Mediterranean diet also showed lower risk of stroke.
Five other popular diets appeared to have little or no benefit with regard to these outcomes.
“These findings with data presentations are extremely important for patients who are skeptical about the desirability of diet change,” wrote the authors, led by Giorgio Karam, a medical student at the University of Manitoba, Winnipeg.
The results were published online in The BMJ.
Dietary guidelines recommend various diets along with physical activity or other cointerventions for adults at increased CVD risk, but they are often based on low-certainty evidence from nonrandomized studies and on surrogate outcomes.
Several meta-analyses of randomized controlled trials with mortality and major CV outcomes have reported benefits of some dietary programs, but those studies did not use network meta-analysis to give absolute estimates and certainty of estimates for adults at intermediate and high risk, the authors noted.
For this study, Mr. Karam and colleagues conducted a comprehensive systematic review and network meta-analysis in which they compared the effects of seven popular structured diets on mortality and CVD events for adults with CVD or CVD risk factors.
The seven diet plans were the Mediterranean, low fat, very low fat, modified fat, combined low fat and low sodium, Ornish, and Pritikin diets. Data for the analysis came from 40 randomized controlled trials that involved 35,548 participants who were followed for an average of 3 years.
There was evidence of “moderate” certainty that the Mediterranean diet was superior to minimal intervention for all-cause mortality (odds ratio [OR], 0.72), CV mortality (OR, 0.55), stroke (OR, 0.65), and nonfatal MI (OR, 0.48).
On an absolute basis (per 1,000 over 5 years), the Mediterranean diet let to 17 fewer deaths from any cause, 13 fewer CV deaths, seven fewer strokes, and 17 fewer nonfatal MIs.
There was evidence of moderate certainty that a low-fat diet was superior to minimal intervention for prevention of all-cause mortality (OR, 0.84; nine fewer deaths per 1,000) and nonfatal MI (OR, 0.77; seven fewer deaths per 1,000). The low-fat diet had little to no benefit with regard to stroke reduction.
The Mediterranean diet was not “convincingly” superior to a low-fat diet for mortality or nonfatal MI, the authors noted.
The absolute effects for the Mediterranean and low-fat diets were more pronounced in adults at high CVD risk. With the Mediterranean diet, there were 36 fewer all-cause deaths and 39 fewer CV deaths per 1,000 over 5 years.
The five other dietary programs generally had “little or no benefit” compared with minimal intervention. The evidence was of low to moderate certainty.
The studies did not provide enough data to gauge the impact of the diets on angina, heart failure, peripheral vascular events, and atrial fibrillation.
The researchers say that strengths of their analysis include a comprehensive review and thorough literature search and a rigorous assessment of study bias. In addition, the researchers adhered to recognized GRADE methods for assessing the certainty of estimates.
Limitations of their work include not being able to measure adherence to dietary programs and the possibility that some of the benefits may have been due to other factors, such as drug treatment and support for quitting smoking.
The study had no specific funding. The authors have disclosed no relevant financial relationships.
A version of this article originally appeared on Medscape.com.
In an analysis of randomized trials, the Mediterranean diet and low-fat diets were linked to reduced risks of all-cause mortality and nonfatal MI over 3 years in adults at increased risk for cardiovascular disease (CVD), while the Mediterranean diet also showed lower risk of stroke.
Five other popular diets appeared to have little or no benefit with regard to these outcomes.
“These findings with data presentations are extremely important for patients who are skeptical about the desirability of diet change,” wrote the authors, led by Giorgio Karam, a medical student at the University of Manitoba, Winnipeg.
The results were published online in The BMJ.
Dietary guidelines recommend various diets along with physical activity or other cointerventions for adults at increased CVD risk, but they are often based on low-certainty evidence from nonrandomized studies and on surrogate outcomes.
Several meta-analyses of randomized controlled trials with mortality and major CV outcomes have reported benefits of some dietary programs, but those studies did not use network meta-analysis to give absolute estimates and certainty of estimates for adults at intermediate and high risk, the authors noted.
For this study, Mr. Karam and colleagues conducted a comprehensive systematic review and network meta-analysis in which they compared the effects of seven popular structured diets on mortality and CVD events for adults with CVD or CVD risk factors.
The seven diet plans were the Mediterranean, low fat, very low fat, modified fat, combined low fat and low sodium, Ornish, and Pritikin diets. Data for the analysis came from 40 randomized controlled trials that involved 35,548 participants who were followed for an average of 3 years.
There was evidence of “moderate” certainty that the Mediterranean diet was superior to minimal intervention for all-cause mortality (odds ratio [OR], 0.72), CV mortality (OR, 0.55), stroke (OR, 0.65), and nonfatal MI (OR, 0.48).
On an absolute basis (per 1,000 over 5 years), the Mediterranean diet let to 17 fewer deaths from any cause, 13 fewer CV deaths, seven fewer strokes, and 17 fewer nonfatal MIs.
There was evidence of moderate certainty that a low-fat diet was superior to minimal intervention for prevention of all-cause mortality (OR, 0.84; nine fewer deaths per 1,000) and nonfatal MI (OR, 0.77; seven fewer deaths per 1,000). The low-fat diet had little to no benefit with regard to stroke reduction.
The Mediterranean diet was not “convincingly” superior to a low-fat diet for mortality or nonfatal MI, the authors noted.
The absolute effects for the Mediterranean and low-fat diets were more pronounced in adults at high CVD risk. With the Mediterranean diet, there were 36 fewer all-cause deaths and 39 fewer CV deaths per 1,000 over 5 years.
The five other dietary programs generally had “little or no benefit” compared with minimal intervention. The evidence was of low to moderate certainty.
The studies did not provide enough data to gauge the impact of the diets on angina, heart failure, peripheral vascular events, and atrial fibrillation.
The researchers say that strengths of their analysis include a comprehensive review and thorough literature search and a rigorous assessment of study bias. In addition, the researchers adhered to recognized GRADE methods for assessing the certainty of estimates.
Limitations of their work include not being able to measure adherence to dietary programs and the possibility that some of the benefits may have been due to other factors, such as drug treatment and support for quitting smoking.
The study had no specific funding. The authors have disclosed no relevant financial relationships.
A version of this article originally appeared on Medscape.com.
Subclinical CAD by CT predicts MI risk, with or without stenoses
About half of middle-aged adults in the community without cardiovascular (CV) symptoms have coronary atherosclerosis by CT angiography (CTA) that puts them at substantial risk for myocardial infarction (MI), suggests a prospective cohort study.
The 10% of participants who had subclinical disease considered obstructive at CTA showed a ninefold increased risk for MI over several years. Obstructive disease seemed to elevate risk more than subclinical disease that wasn’t obstructive but still considered extensive within the coronary arteries.
The findings, based on a Copenhagen General Population Study cohort, are new for CTA but consistent with research based on coronary artery calcium (CAC) scores and other ways to assess CV risk, say researchers.
Although all participants underwent CTA, such imaging isn’t used in the general population for atherosclerosis screening. But the findings may have implications for “opportunistic screening” for subclinical coronary disease at CTA conducted for other reasons, notes the study’s report, published online in the Annals of Internal Medicine.
“Identification of luminal obstructive or extensive subclinical coronary atherosclerosis” could potentially provide “clinically relevant, incremental risk assessment” in nonischemic patients who undergo cardiac CT or electrocardiogram-gated chest CT before procedures such as arrhythmia ablation or valve repair, it states.
Such patients found with subclinical coronary atherosclerosis might potentially “benefit from referral to intensified cardiovascular primary prevention therapy,” write the authors, led by Andreas Fuchs, MD, PhD, Copenhagen University Hospital-Rigshospitalet.
The group acknowledges the findings may not entirely apply to a non-Danish population.
A screening role for CTA?
Whether CTA has a role to play in adults without symptoms “is a big, open question in the field right now,” observed Ron Blankstein, MD, not associated with the current analysis, for this news organization.
Most population studies of CV risk prediction, such as MESA, have looked at CAC scores, not CTA, and have shown that “the more plaque individuals have, the higher the risk.” The current findings are similar but novel in coming from coronary CTA in a large asymptomatic community population, said Dr. Blankstein, who is director of cardiac CT at Brigham and Women’s Hospital, Boston.
“It’s possible that patients who have obstructive plaque in general tend to have a larger amount of plaque as well,” he said. So, while the study suggests that “the more plaque individuals have, the worse their overall risk,” it also shows that the risk “is enhanced even more if they have obstructive disease.”
The Danish cohort analysis “provides a unique opportunity to study the contemporary natural history of coronary artery disease in the absence of intervention,” notes an accompanying editorial.
For example, both patients and clinicians were blinded to CTA results, and CV preventive therapies weren’t common, observe Michael McDermott, MBChB, and David E. Newby, DM, PhD, of the BHF Centre for Cardiovascular Science, University of Edinburgh.
The analysis suggests that subclinical coronary disease that is obstructive predicts MI risk more strongly than extensive coronary disease, they note, and may be present in two-thirds of MI patients. “This contrasts with symptomatic populations, where nonobstructive disease accounts for most future myocardial infarctions, presumably from plaque rupture.”
It also points to “strong associations between nonobstructive extensive disease and adverse plaque characteristics,” write Dr. McDermott and Dr. Newby. “This underscores the major importance of plaque burden” for the prediction of coronary events.
Graded risk
The analysis included 9,533 persons aged 40 and older without known ischemic heart disease or symptoms with available CTA assessments.
Obstructive disease, defined as presence of a luminal stenosis of at least 50%, was seen in 10% and nonobstructive disease in 36% of the total cohort, the report states.
Disease occupying more than one-third of the coronary tree was considered extensive and less than one-third of the coronaries nonextensive, occurring in 10.5% and 35.8% of the cohort, respectively.
There were 71 MIs and 193 deaths over a median of 3.5 years. The adjusted relative risk for MI, compared with those without coronary atherosclerosis, was:
- 7.65 (95% confidence interval, 3.53-16.57) overall in patients with extensive disease.
- 8.28 (95% CI, 3.75-18.32) in those with obstructive but nonextensive disease.
- 9.19 (95% CI, 4.49-18.82) overall in those with obstructive disease.
- 12.48 (95% CI, 5.50-28.12) in those with or obstructive and extensive disease.
The adjusted RR for the composite of death or MI was also elevated in persons with extensive disease:
- 2.70 (95% CI, 1.72-4.25) in those with extensive but nonobstructive disease.
- 3.15 (95% CI, 2.05-4.83) in those with extensive and obstructive disease.
“It’s one thing to show that the more plaque, the higher the risk,” Dr. Blankstein said. But “does the information ultimately lead to better outcomes? Do patients have fewer MIs or fewer deaths?” Several ongoing randomized trials are exploring these questions.
They include DANE-HEART (Computed Tomography Coronary Angiography for Primary Prevention), projected to enroll about 6,000 participants from the Copenhagen General Population Study cohort who have at least one CV risk factor, and SCOT-HEART 2 (second Computed Tomography Coronary Angiography for the Prevention of Myocardial Infarction), enrolling a similar cohort in Scotland.
The study was supported by grants from AP Møller og Hustru Chastine Mc-Kinney Møllers Fond, the Research Council of Rigshospitalet, and Danish Heart Foundation. Dr. Fuchs reports no relevant financial relationships. Disclosures for the other authors can be found here. Dr. Blankstein recently disclosed serving as a consultant to Amgen, Caristo Diagnostics, Novartis, and Silence Therapeutics. Disclosures for Dr. McDermott and Dr. Newby, who are SCOT-HEART 2 investigators, can be found here.
A version of this article originally appeared on Medscape.com.
About half of middle-aged adults in the community without cardiovascular (CV) symptoms have coronary atherosclerosis by CT angiography (CTA) that puts them at substantial risk for myocardial infarction (MI), suggests a prospective cohort study.
The 10% of participants who had subclinical disease considered obstructive at CTA showed a ninefold increased risk for MI over several years. Obstructive disease seemed to elevate risk more than subclinical disease that wasn’t obstructive but still considered extensive within the coronary arteries.
The findings, based on a Copenhagen General Population Study cohort, are new for CTA but consistent with research based on coronary artery calcium (CAC) scores and other ways to assess CV risk, say researchers.
Although all participants underwent CTA, such imaging isn’t used in the general population for atherosclerosis screening. But the findings may have implications for “opportunistic screening” for subclinical coronary disease at CTA conducted for other reasons, notes the study’s report, published online in the Annals of Internal Medicine.
“Identification of luminal obstructive or extensive subclinical coronary atherosclerosis” could potentially provide “clinically relevant, incremental risk assessment” in nonischemic patients who undergo cardiac CT or electrocardiogram-gated chest CT before procedures such as arrhythmia ablation or valve repair, it states.
Such patients found with subclinical coronary atherosclerosis might potentially “benefit from referral to intensified cardiovascular primary prevention therapy,” write the authors, led by Andreas Fuchs, MD, PhD, Copenhagen University Hospital-Rigshospitalet.
The group acknowledges the findings may not entirely apply to a non-Danish population.
A screening role for CTA?
Whether CTA has a role to play in adults without symptoms “is a big, open question in the field right now,” observed Ron Blankstein, MD, not associated with the current analysis, for this news organization.
Most population studies of CV risk prediction, such as MESA, have looked at CAC scores, not CTA, and have shown that “the more plaque individuals have, the higher the risk.” The current findings are similar but novel in coming from coronary CTA in a large asymptomatic community population, said Dr. Blankstein, who is director of cardiac CT at Brigham and Women’s Hospital, Boston.
“It’s possible that patients who have obstructive plaque in general tend to have a larger amount of plaque as well,” he said. So, while the study suggests that “the more plaque individuals have, the worse their overall risk,” it also shows that the risk “is enhanced even more if they have obstructive disease.”
The Danish cohort analysis “provides a unique opportunity to study the contemporary natural history of coronary artery disease in the absence of intervention,” notes an accompanying editorial.
For example, both patients and clinicians were blinded to CTA results, and CV preventive therapies weren’t common, observe Michael McDermott, MBChB, and David E. Newby, DM, PhD, of the BHF Centre for Cardiovascular Science, University of Edinburgh.
The analysis suggests that subclinical coronary disease that is obstructive predicts MI risk more strongly than extensive coronary disease, they note, and may be present in two-thirds of MI patients. “This contrasts with symptomatic populations, where nonobstructive disease accounts for most future myocardial infarctions, presumably from plaque rupture.”
It also points to “strong associations between nonobstructive extensive disease and adverse plaque characteristics,” write Dr. McDermott and Dr. Newby. “This underscores the major importance of plaque burden” for the prediction of coronary events.
Graded risk
The analysis included 9,533 persons aged 40 and older without known ischemic heart disease or symptoms with available CTA assessments.
Obstructive disease, defined as presence of a luminal stenosis of at least 50%, was seen in 10% and nonobstructive disease in 36% of the total cohort, the report states.
Disease occupying more than one-third of the coronary tree was considered extensive and less than one-third of the coronaries nonextensive, occurring in 10.5% and 35.8% of the cohort, respectively.
There were 71 MIs and 193 deaths over a median of 3.5 years. The adjusted relative risk for MI, compared with those without coronary atherosclerosis, was:
- 7.65 (95% confidence interval, 3.53-16.57) overall in patients with extensive disease.
- 8.28 (95% CI, 3.75-18.32) in those with obstructive but nonextensive disease.
- 9.19 (95% CI, 4.49-18.82) overall in those with obstructive disease.
- 12.48 (95% CI, 5.50-28.12) in those with or obstructive and extensive disease.
The adjusted RR for the composite of death or MI was also elevated in persons with extensive disease:
- 2.70 (95% CI, 1.72-4.25) in those with extensive but nonobstructive disease.
- 3.15 (95% CI, 2.05-4.83) in those with extensive and obstructive disease.
“It’s one thing to show that the more plaque, the higher the risk,” Dr. Blankstein said. But “does the information ultimately lead to better outcomes? Do patients have fewer MIs or fewer deaths?” Several ongoing randomized trials are exploring these questions.
They include DANE-HEART (Computed Tomography Coronary Angiography for Primary Prevention), projected to enroll about 6,000 participants from the Copenhagen General Population Study cohort who have at least one CV risk factor, and SCOT-HEART 2 (second Computed Tomography Coronary Angiography for the Prevention of Myocardial Infarction), enrolling a similar cohort in Scotland.
The study was supported by grants from AP Møller og Hustru Chastine Mc-Kinney Møllers Fond, the Research Council of Rigshospitalet, and Danish Heart Foundation. Dr. Fuchs reports no relevant financial relationships. Disclosures for the other authors can be found here. Dr. Blankstein recently disclosed serving as a consultant to Amgen, Caristo Diagnostics, Novartis, and Silence Therapeutics. Disclosures for Dr. McDermott and Dr. Newby, who are SCOT-HEART 2 investigators, can be found here.
A version of this article originally appeared on Medscape.com.
About half of middle-aged adults in the community without cardiovascular (CV) symptoms have coronary atherosclerosis by CT angiography (CTA) that puts them at substantial risk for myocardial infarction (MI), suggests a prospective cohort study.
The 10% of participants who had subclinical disease considered obstructive at CTA showed a ninefold increased risk for MI over several years. Obstructive disease seemed to elevate risk more than subclinical disease that wasn’t obstructive but still considered extensive within the coronary arteries.
The findings, based on a Copenhagen General Population Study cohort, are new for CTA but consistent with research based on coronary artery calcium (CAC) scores and other ways to assess CV risk, say researchers.
Although all participants underwent CTA, such imaging isn’t used in the general population for atherosclerosis screening. But the findings may have implications for “opportunistic screening” for subclinical coronary disease at CTA conducted for other reasons, notes the study’s report, published online in the Annals of Internal Medicine.
“Identification of luminal obstructive or extensive subclinical coronary atherosclerosis” could potentially provide “clinically relevant, incremental risk assessment” in nonischemic patients who undergo cardiac CT or electrocardiogram-gated chest CT before procedures such as arrhythmia ablation or valve repair, it states.
Such patients found with subclinical coronary atherosclerosis might potentially “benefit from referral to intensified cardiovascular primary prevention therapy,” write the authors, led by Andreas Fuchs, MD, PhD, Copenhagen University Hospital-Rigshospitalet.
The group acknowledges the findings may not entirely apply to a non-Danish population.
A screening role for CTA?
Whether CTA has a role to play in adults without symptoms “is a big, open question in the field right now,” observed Ron Blankstein, MD, not associated with the current analysis, for this news organization.
Most population studies of CV risk prediction, such as MESA, have looked at CAC scores, not CTA, and have shown that “the more plaque individuals have, the higher the risk.” The current findings are similar but novel in coming from coronary CTA in a large asymptomatic community population, said Dr. Blankstein, who is director of cardiac CT at Brigham and Women’s Hospital, Boston.
“It’s possible that patients who have obstructive plaque in general tend to have a larger amount of plaque as well,” he said. So, while the study suggests that “the more plaque individuals have, the worse their overall risk,” it also shows that the risk “is enhanced even more if they have obstructive disease.”
The Danish cohort analysis “provides a unique opportunity to study the contemporary natural history of coronary artery disease in the absence of intervention,” notes an accompanying editorial.
For example, both patients and clinicians were blinded to CTA results, and CV preventive therapies weren’t common, observe Michael McDermott, MBChB, and David E. Newby, DM, PhD, of the BHF Centre for Cardiovascular Science, University of Edinburgh.
The analysis suggests that subclinical coronary disease that is obstructive predicts MI risk more strongly than extensive coronary disease, they note, and may be present in two-thirds of MI patients. “This contrasts with symptomatic populations, where nonobstructive disease accounts for most future myocardial infarctions, presumably from plaque rupture.”
It also points to “strong associations between nonobstructive extensive disease and adverse plaque characteristics,” write Dr. McDermott and Dr. Newby. “This underscores the major importance of plaque burden” for the prediction of coronary events.
Graded risk
The analysis included 9,533 persons aged 40 and older without known ischemic heart disease or symptoms with available CTA assessments.
Obstructive disease, defined as presence of a luminal stenosis of at least 50%, was seen in 10% and nonobstructive disease in 36% of the total cohort, the report states.
Disease occupying more than one-third of the coronary tree was considered extensive and less than one-third of the coronaries nonextensive, occurring in 10.5% and 35.8% of the cohort, respectively.
There were 71 MIs and 193 deaths over a median of 3.5 years. The adjusted relative risk for MI, compared with those without coronary atherosclerosis, was:
- 7.65 (95% confidence interval, 3.53-16.57) overall in patients with extensive disease.
- 8.28 (95% CI, 3.75-18.32) in those with obstructive but nonextensive disease.
- 9.19 (95% CI, 4.49-18.82) overall in those with obstructive disease.
- 12.48 (95% CI, 5.50-28.12) in those with or obstructive and extensive disease.
The adjusted RR for the composite of death or MI was also elevated in persons with extensive disease:
- 2.70 (95% CI, 1.72-4.25) in those with extensive but nonobstructive disease.
- 3.15 (95% CI, 2.05-4.83) in those with extensive and obstructive disease.
“It’s one thing to show that the more plaque, the higher the risk,” Dr. Blankstein said. But “does the information ultimately lead to better outcomes? Do patients have fewer MIs or fewer deaths?” Several ongoing randomized trials are exploring these questions.
They include DANE-HEART (Computed Tomography Coronary Angiography for Primary Prevention), projected to enroll about 6,000 participants from the Copenhagen General Population Study cohort who have at least one CV risk factor, and SCOT-HEART 2 (second Computed Tomography Coronary Angiography for the Prevention of Myocardial Infarction), enrolling a similar cohort in Scotland.
The study was supported by grants from AP Møller og Hustru Chastine Mc-Kinney Møllers Fond, the Research Council of Rigshospitalet, and Danish Heart Foundation. Dr. Fuchs reports no relevant financial relationships. Disclosures for the other authors can be found here. Dr. Blankstein recently disclosed serving as a consultant to Amgen, Caristo Diagnostics, Novartis, and Silence Therapeutics. Disclosures for Dr. McDermott and Dr. Newby, who are SCOT-HEART 2 investigators, can be found here.
A version of this article originally appeared on Medscape.com.
Commotio cordis underrecognized, undertreated outside of sports
Sudden cardiac arrest (SCA) due to commotio cordis occurs more frequently in non–sport-related settings than is commonly thought, resulting in lower rates of resuscitation and increased mortality, especially among young women, a new review suggests.
The condition is rare, caused by an often fatal arrhythmia secondary to a blunt, nonpenetrating impact over the precordium, without direct structural damage to the heart itself. Common causes in nonsport settings include assault, motor vehicle accidents (MVAs), and daily activities such as occupational accidents.
“We found a stark difference in mortality outcomes between non–sport-related commotio cordis compared to sport-related events,” at 88% vs. 66%, Han S. Lim, MBBS, PhD, of the University of Melbourne, and Austin Health, Heidelberg, Australia, told this news organization. “Rates of cardiopulmonary resuscitation (CPR) (27% vs. 97%) and defibrillation (17% vs. 81%) were considerably lower in the non–sport-related events.”
“Although still being male-predominant, of concern, we saw a higher proportion of females in non–sport-related commotio cordis due to assault, MVAs, and other activities,” he noted. Such events may occur “in secluded domestic settings, may not be witnessed, or may occur as intentional harm, whereby the witness could also be the perpetrator, reducing the likelihood of prompt diagnosis, CPR, and defibrillation administration.”
The study was published online in JACC: Clinical Electrophysiology.
Young women affected
Dr. Lim and colleagues searched the literature through 2021 for all cases of commotio cordis. Three hundred and thirty-four cases from among 53 citations were included in the analysis; of those, 121 (36%) occurred in non–sport-related settings, including assault (76%), MVAs (7%), and daily activities (16%). “Daily activities” comprised activities that were expected in a person’s day-to-day routine such as falls, play fighting (in children), and occupational accidents.
Non–sport-related cases primarily involved nonprojectile etiologies (95%), including bodily contact (79%), such as impacts from fists, feet, and knees; impacts with handlebars or steering wheels; and solid stick-like weapons and flat surfaces.
Sport-related cases involved a significantly higher proportion of projectiles (94% vs. 5%) and occurred across a range of sports, mostly at the competitive level (66%).
Both sport-related and non–sport-related commotio cordis affected a similar younger demographic (mean age, 19; mostly males). No statistically significant differences between the two groups were seen with regard to previous cardiac history or family history of cardiac disease, or in arrhythmias on electrocardiogram, biomarkers, or imaging findings.
However, in non–sport-related events, the proportion of females affected was significantly higher (13% vs. 2%), as was mortality (88% vs. 66%). Rates were lower for CPR (27% vs. 97%) and defibrillation use (17% vs. 81%), and resuscitation was more commonly delayed beyond 3 minutes (80% vs. 5%).
The finding that more than a third of reported cases were non–sport-related “is higher than previously reported, and included data from 15 different countries,” the authors noted.
Study limitations included the use of data only from published studies, inclusion of a case series limited to fatal cases, small sample sizes, and lack of consistent reporting of demographic data, mechanisms, investigation results, management, and outcomes.
Increased awareness ‘essential’
Dr. Lim and colleagues concluded that increased awareness of non–sport-related commotio cordis is “essential” for early recognition, resuscitation, and mortality reduction.
Jim Cheung, MD, chair of the American College of Cardiology’s electrophysiology section, “completely agrees.” Greater awareness among the general population could reduce barriers to CPR and automated external defibrillator (AED) use, he said, which in turn, can lead to improved survival.
Furthermore, Dr. Cheung added, “This study underscores the importance of ensuring that non–cardiology-trained physicians such as emergency medicine physicians and trauma surgeons who might encounter patients with non–sports-related commotio cordis recognize the entity during the course of treatment.”
Because the review relied only on published cases, “it may not represent the true breadth of cases that are occurring in the real world,” he noted. “I suspect that cases that occur outside of sports-related activities, such as MVAs and assault, are more likely to be underreported and that the true proportion of non–sports-related commotio cordis may be significantly higher than 36%.” Increased reporting of cases as part of an international commotio cordis registry would help provide additional insights, he suggested.
“There is a common misperception that SCA only occurs among older patients and patients with known coronary artery disease or heart failure,” he said. “For us to move the needle on improving SCA survival, we will need to tackle the problem from multiple angles including increasing public awareness, training the public on CPR and AED use, and improving access to AEDs by addressing structural barriers.”
Dr. Cheung pointed to ongoing efforts by nonprofit, patient-driven organizations such as the SADS Foundation and Omar Carter Foundation, and professional societies such as the American College of Cardiology, the American Heart Association, and Heart Rhythm Society, to direct public awareness campaigns and legislative proposals to address this problem.
Similar efforts are underway among cardiac societies and SCA awareness groups in Australia, Dr. Lim said.
No funding or relevant financial relationships were disclosed.
A version of this article first appeared on Medscape.com.
Sudden cardiac arrest (SCA) due to commotio cordis occurs more frequently in non–sport-related settings than is commonly thought, resulting in lower rates of resuscitation and increased mortality, especially among young women, a new review suggests.
The condition is rare, caused by an often fatal arrhythmia secondary to a blunt, nonpenetrating impact over the precordium, without direct structural damage to the heart itself. Common causes in nonsport settings include assault, motor vehicle accidents (MVAs), and daily activities such as occupational accidents.
“We found a stark difference in mortality outcomes between non–sport-related commotio cordis compared to sport-related events,” at 88% vs. 66%, Han S. Lim, MBBS, PhD, of the University of Melbourne, and Austin Health, Heidelberg, Australia, told this news organization. “Rates of cardiopulmonary resuscitation (CPR) (27% vs. 97%) and defibrillation (17% vs. 81%) were considerably lower in the non–sport-related events.”
“Although still being male-predominant, of concern, we saw a higher proportion of females in non–sport-related commotio cordis due to assault, MVAs, and other activities,” he noted. Such events may occur “in secluded domestic settings, may not be witnessed, or may occur as intentional harm, whereby the witness could also be the perpetrator, reducing the likelihood of prompt diagnosis, CPR, and defibrillation administration.”
The study was published online in JACC: Clinical Electrophysiology.
Young women affected
Dr. Lim and colleagues searched the literature through 2021 for all cases of commotio cordis. Three hundred and thirty-four cases from among 53 citations were included in the analysis; of those, 121 (36%) occurred in non–sport-related settings, including assault (76%), MVAs (7%), and daily activities (16%). “Daily activities” comprised activities that were expected in a person’s day-to-day routine such as falls, play fighting (in children), and occupational accidents.
Non–sport-related cases primarily involved nonprojectile etiologies (95%), including bodily contact (79%), such as impacts from fists, feet, and knees; impacts with handlebars or steering wheels; and solid stick-like weapons and flat surfaces.
Sport-related cases involved a significantly higher proportion of projectiles (94% vs. 5%) and occurred across a range of sports, mostly at the competitive level (66%).
Both sport-related and non–sport-related commotio cordis affected a similar younger demographic (mean age, 19; mostly males). No statistically significant differences between the two groups were seen with regard to previous cardiac history or family history of cardiac disease, or in arrhythmias on electrocardiogram, biomarkers, or imaging findings.
However, in non–sport-related events, the proportion of females affected was significantly higher (13% vs. 2%), as was mortality (88% vs. 66%). Rates were lower for CPR (27% vs. 97%) and defibrillation use (17% vs. 81%), and resuscitation was more commonly delayed beyond 3 minutes (80% vs. 5%).
The finding that more than a third of reported cases were non–sport-related “is higher than previously reported, and included data from 15 different countries,” the authors noted.
Study limitations included the use of data only from published studies, inclusion of a case series limited to fatal cases, small sample sizes, and lack of consistent reporting of demographic data, mechanisms, investigation results, management, and outcomes.
Increased awareness ‘essential’
Dr. Lim and colleagues concluded that increased awareness of non–sport-related commotio cordis is “essential” for early recognition, resuscitation, and mortality reduction.
Jim Cheung, MD, chair of the American College of Cardiology’s electrophysiology section, “completely agrees.” Greater awareness among the general population could reduce barriers to CPR and automated external defibrillator (AED) use, he said, which in turn, can lead to improved survival.
Furthermore, Dr. Cheung added, “This study underscores the importance of ensuring that non–cardiology-trained physicians such as emergency medicine physicians and trauma surgeons who might encounter patients with non–sports-related commotio cordis recognize the entity during the course of treatment.”
Because the review relied only on published cases, “it may not represent the true breadth of cases that are occurring in the real world,” he noted. “I suspect that cases that occur outside of sports-related activities, such as MVAs and assault, are more likely to be underreported and that the true proportion of non–sports-related commotio cordis may be significantly higher than 36%.” Increased reporting of cases as part of an international commotio cordis registry would help provide additional insights, he suggested.
“There is a common misperception that SCA only occurs among older patients and patients with known coronary artery disease or heart failure,” he said. “For us to move the needle on improving SCA survival, we will need to tackle the problem from multiple angles including increasing public awareness, training the public on CPR and AED use, and improving access to AEDs by addressing structural barriers.”
Dr. Cheung pointed to ongoing efforts by nonprofit, patient-driven organizations such as the SADS Foundation and Omar Carter Foundation, and professional societies such as the American College of Cardiology, the American Heart Association, and Heart Rhythm Society, to direct public awareness campaigns and legislative proposals to address this problem.
Similar efforts are underway among cardiac societies and SCA awareness groups in Australia, Dr. Lim said.
No funding or relevant financial relationships were disclosed.
A version of this article first appeared on Medscape.com.
Sudden cardiac arrest (SCA) due to commotio cordis occurs more frequently in non–sport-related settings than is commonly thought, resulting in lower rates of resuscitation and increased mortality, especially among young women, a new review suggests.
The condition is rare, caused by an often fatal arrhythmia secondary to a blunt, nonpenetrating impact over the precordium, without direct structural damage to the heart itself. Common causes in nonsport settings include assault, motor vehicle accidents (MVAs), and daily activities such as occupational accidents.
“We found a stark difference in mortality outcomes between non–sport-related commotio cordis compared to sport-related events,” at 88% vs. 66%, Han S. Lim, MBBS, PhD, of the University of Melbourne, and Austin Health, Heidelberg, Australia, told this news organization. “Rates of cardiopulmonary resuscitation (CPR) (27% vs. 97%) and defibrillation (17% vs. 81%) were considerably lower in the non–sport-related events.”
“Although still being male-predominant, of concern, we saw a higher proportion of females in non–sport-related commotio cordis due to assault, MVAs, and other activities,” he noted. Such events may occur “in secluded domestic settings, may not be witnessed, or may occur as intentional harm, whereby the witness could also be the perpetrator, reducing the likelihood of prompt diagnosis, CPR, and defibrillation administration.”
The study was published online in JACC: Clinical Electrophysiology.
Young women affected
Dr. Lim and colleagues searched the literature through 2021 for all cases of commotio cordis. Three hundred and thirty-four cases from among 53 citations were included in the analysis; of those, 121 (36%) occurred in non–sport-related settings, including assault (76%), MVAs (7%), and daily activities (16%). “Daily activities” comprised activities that were expected in a person’s day-to-day routine such as falls, play fighting (in children), and occupational accidents.
Non–sport-related cases primarily involved nonprojectile etiologies (95%), including bodily contact (79%), such as impacts from fists, feet, and knees; impacts with handlebars or steering wheels; and solid stick-like weapons and flat surfaces.
Sport-related cases involved a significantly higher proportion of projectiles (94% vs. 5%) and occurred across a range of sports, mostly at the competitive level (66%).
Both sport-related and non–sport-related commotio cordis affected a similar younger demographic (mean age, 19; mostly males). No statistically significant differences between the two groups were seen with regard to previous cardiac history or family history of cardiac disease, or in arrhythmias on electrocardiogram, biomarkers, or imaging findings.
However, in non–sport-related events, the proportion of females affected was significantly higher (13% vs. 2%), as was mortality (88% vs. 66%). Rates were lower for CPR (27% vs. 97%) and defibrillation use (17% vs. 81%), and resuscitation was more commonly delayed beyond 3 minutes (80% vs. 5%).
The finding that more than a third of reported cases were non–sport-related “is higher than previously reported, and included data from 15 different countries,” the authors noted.
Study limitations included the use of data only from published studies, inclusion of a case series limited to fatal cases, small sample sizes, and lack of consistent reporting of demographic data, mechanisms, investigation results, management, and outcomes.
Increased awareness ‘essential’
Dr. Lim and colleagues concluded that increased awareness of non–sport-related commotio cordis is “essential” for early recognition, resuscitation, and mortality reduction.
Jim Cheung, MD, chair of the American College of Cardiology’s electrophysiology section, “completely agrees.” Greater awareness among the general population could reduce barriers to CPR and automated external defibrillator (AED) use, he said, which in turn, can lead to improved survival.
Furthermore, Dr. Cheung added, “This study underscores the importance of ensuring that non–cardiology-trained physicians such as emergency medicine physicians and trauma surgeons who might encounter patients with non–sports-related commotio cordis recognize the entity during the course of treatment.”
Because the review relied only on published cases, “it may not represent the true breadth of cases that are occurring in the real world,” he noted. “I suspect that cases that occur outside of sports-related activities, such as MVAs and assault, are more likely to be underreported and that the true proportion of non–sports-related commotio cordis may be significantly higher than 36%.” Increased reporting of cases as part of an international commotio cordis registry would help provide additional insights, he suggested.
“There is a common misperception that SCA only occurs among older patients and patients with known coronary artery disease or heart failure,” he said. “For us to move the needle on improving SCA survival, we will need to tackle the problem from multiple angles including increasing public awareness, training the public on CPR and AED use, and improving access to AEDs by addressing structural barriers.”
Dr. Cheung pointed to ongoing efforts by nonprofit, patient-driven organizations such as the SADS Foundation and Omar Carter Foundation, and professional societies such as the American College of Cardiology, the American Heart Association, and Heart Rhythm Society, to direct public awareness campaigns and legislative proposals to address this problem.
Similar efforts are underway among cardiac societies and SCA awareness groups in Australia, Dr. Lim said.
No funding or relevant financial relationships were disclosed.
A version of this article first appeared on Medscape.com.
FROM JACC: CLINICAL ELECTROPHYSIOLOGY
One or two high-step days may reduce mortality risks
Taking 8,000 steps or more for just 1 or 2 days a week was linked to a significant reduction in all-cause and cardiovascular mortality, according to a study of about 3,000 adults.
Previous research has shown lower mortality rates among individuals who walk consistently, especially those who log at least 8,000 steps daily, but the benefit of intense walking just once or twice a week on long-term health outcomes has not been examined, wrote Kosuke Inoue, MD, of Kyoto University, Japan, and colleagues.
In a study published in JAMA Network Open, the researchers reviewed 10-year follow-up data for 3,101 adults aged 20 years and older who were part of the 2005 and 2006 National Health and Nutrition Examination Survey (NHANES).
The participants were asked to wear accelerometers to track their steps for 7 consecutive days. The researchers assessed the dose-response relationship between days of taking 8,000 steps or more (about 4 miles) during 1 week, and the primary outcome of all-cause mortality risk after 10 years. Cardiovascular mortality risk after 10 years was a secondary outcome.
The mean age of the participants was 50.5 years and 51% were women. The breakdown by ethnicity was 51% White, 21% Black, 24% Hispanic, and 4% other races/ethnicities. A total of 632 individuals took 8,000 steps or more 0 days a week, 532 took at least 8,000 steps 1-2 days per week, and 1,937 took at least 8,000 steps 3-7 days a week.
During the 10-year follow-up period, overall all-cause mortality was 14.2% and cardiovascular mortality was 5.3% across all step groups.
In an adjusted analysis, individuals who took at least 8,000 steps 1-2 days a week had a 14.9% lower all-cause mortality risk compared with those who never reached 8,000 daily steps. This difference was similar to the 16.5% reduced mortality risk for those who took at least 8,000 steps 3-7 days a week.
Similarly, compared with the group with no days of at least 8,000 steps, cardiovascular mortality risk was 8.1% lower for those who took 8,000 steps 1-2 days per week and 8.4% lower for those who took at least 8,000 steps 3-7 days per week. The decreased mortality risk plateaued at 3-4 days.
These patterns in reduced all-cause mortality risk persisted in a stratified analysis by age (younger than 65 years and 65 years and older) and sex. Similar patterns in reduced mortality also emerged when the researchers used different thresholds of daily steps, such as a minimum of 10,000 steps instead of 8,000. The adjusted all-cause mortality for groups who took at least 10,000 steps 1-2 days a week, 3-7 days a week, and no days a week were 8.1%, 7.3%, and 16.7%, respectively, with corresponding cardiovascular mortality risks of 2.4%, 2.3%, and 7.0%, respectively.
“Given the simplicity and ease of counting daily steps, our findings indicate that the recommended number of steps taken on as few as 1 to 2 days per week may be a feasible option for individuals who are striving to achieve some health benefits through adhering to a recommended daily step count but are unable to accomplish this on a daily basis,” the researchers wrote in their discussion.
The findings were limited by several factors including the use daily step measures for 1 week only at baseline, with no data on how physical activity changes might impact mortality risk, the researchers noted. Other limitations included possible accelerometer error and misclassification of activity, possible selection bias, and lack of data on cause-specific mortality outside of cardiovascular death, they said.
However, the results were strengthened by the use of accelerometers as objective measures of activity and by the availability of 10-year follow-up data for nearly 100% of the participants, they said.
“Although our findings might suffer from residual confounding that should be addressed in future research, they suggest that people may receive substantial health benefits even if a sufficient number of steps are taken on only a couple days of the week,” they concluded.
Proceed with caution
The current study findings should be interpreted cautiously in light of the potential unmeasured confounding factors and selection bias that often occur in studies of physical activity, James Sawalla Guseh, MD, of Massachusetts General Hospital, and Jose F. Figueroa, MD, of Harvard T.H. Chan School of Public Health, Boston, wrote in an accompanying editorial.
The results support previous studies showing some longevity benefits with “weekend warrior” patterns of intense physical activity for only a couple of days; however, “the body of evidence for sporadic activity is not as robust as the evidence for sustained and regular aerobic activity,” the authors emphasized.
The editorial authors also highlighted the limitations of the current study, including the observational design and significant differences in demographics and comorbidities between the 1- to 2-days of 8,000 steps exercise group and the 0-day group, as well as the reliance on only a week’s worth of data to infer 10 years’ mortality.
Although the data are consistent with previous observations that increased exercise volume reduces mortality, more research is needed, as the current study findings may not reflect other dimensions of health, including neurological health, they said.
Despite the need for cautious interpretation of the results, the current study “supports the emerging and popular idea that step counting, which does not require consideration of exercise duration or intensity, can offer guidance toward robust and favorable health outcomes,” and may inform step-based activity goals to improve public health, the editorialists wrote.
The study was supported by the Japan Agency for Medical Research and Development, the Japan Society for the Promotion of Science, the Japan Endocrine Society, and the Meiji Yasuda Life Foundation of Health and Welfare. Dr. Inoue also was supported by the Program for the Development of Next-Generation Leading Scientists With Global Insight sponsored by the Ministry of Education, Culture, Sports, Science and Technology, Japan. The other researchers had no relevant financial conflicts to disclose. The editorial authors had no financial conflicts to disclose.
Taking 8,000 steps or more for just 1 or 2 days a week was linked to a significant reduction in all-cause and cardiovascular mortality, according to a study of about 3,000 adults.
Previous research has shown lower mortality rates among individuals who walk consistently, especially those who log at least 8,000 steps daily, but the benefit of intense walking just once or twice a week on long-term health outcomes has not been examined, wrote Kosuke Inoue, MD, of Kyoto University, Japan, and colleagues.
In a study published in JAMA Network Open, the researchers reviewed 10-year follow-up data for 3,101 adults aged 20 years and older who were part of the 2005 and 2006 National Health and Nutrition Examination Survey (NHANES).
The participants were asked to wear accelerometers to track their steps for 7 consecutive days. The researchers assessed the dose-response relationship between days of taking 8,000 steps or more (about 4 miles) during 1 week, and the primary outcome of all-cause mortality risk after 10 years. Cardiovascular mortality risk after 10 years was a secondary outcome.
The mean age of the participants was 50.5 years and 51% were women. The breakdown by ethnicity was 51% White, 21% Black, 24% Hispanic, and 4% other races/ethnicities. A total of 632 individuals took 8,000 steps or more 0 days a week, 532 took at least 8,000 steps 1-2 days per week, and 1,937 took at least 8,000 steps 3-7 days a week.
During the 10-year follow-up period, overall all-cause mortality was 14.2% and cardiovascular mortality was 5.3% across all step groups.
In an adjusted analysis, individuals who took at least 8,000 steps 1-2 days a week had a 14.9% lower all-cause mortality risk compared with those who never reached 8,000 daily steps. This difference was similar to the 16.5% reduced mortality risk for those who took at least 8,000 steps 3-7 days a week.
Similarly, compared with the group with no days of at least 8,000 steps, cardiovascular mortality risk was 8.1% lower for those who took 8,000 steps 1-2 days per week and 8.4% lower for those who took at least 8,000 steps 3-7 days per week. The decreased mortality risk plateaued at 3-4 days.
These patterns in reduced all-cause mortality risk persisted in a stratified analysis by age (younger than 65 years and 65 years and older) and sex. Similar patterns in reduced mortality also emerged when the researchers used different thresholds of daily steps, such as a minimum of 10,000 steps instead of 8,000. The adjusted all-cause mortality for groups who took at least 10,000 steps 1-2 days a week, 3-7 days a week, and no days a week were 8.1%, 7.3%, and 16.7%, respectively, with corresponding cardiovascular mortality risks of 2.4%, 2.3%, and 7.0%, respectively.
“Given the simplicity and ease of counting daily steps, our findings indicate that the recommended number of steps taken on as few as 1 to 2 days per week may be a feasible option for individuals who are striving to achieve some health benefits through adhering to a recommended daily step count but are unable to accomplish this on a daily basis,” the researchers wrote in their discussion.
The findings were limited by several factors including the use daily step measures for 1 week only at baseline, with no data on how physical activity changes might impact mortality risk, the researchers noted. Other limitations included possible accelerometer error and misclassification of activity, possible selection bias, and lack of data on cause-specific mortality outside of cardiovascular death, they said.
However, the results were strengthened by the use of accelerometers as objective measures of activity and by the availability of 10-year follow-up data for nearly 100% of the participants, they said.
“Although our findings might suffer from residual confounding that should be addressed in future research, they suggest that people may receive substantial health benefits even if a sufficient number of steps are taken on only a couple days of the week,” they concluded.
Proceed with caution
The current study findings should be interpreted cautiously in light of the potential unmeasured confounding factors and selection bias that often occur in studies of physical activity, James Sawalla Guseh, MD, of Massachusetts General Hospital, and Jose F. Figueroa, MD, of Harvard T.H. Chan School of Public Health, Boston, wrote in an accompanying editorial.
The results support previous studies showing some longevity benefits with “weekend warrior” patterns of intense physical activity for only a couple of days; however, “the body of evidence for sporadic activity is not as robust as the evidence for sustained and regular aerobic activity,” the authors emphasized.
The editorial authors also highlighted the limitations of the current study, including the observational design and significant differences in demographics and comorbidities between the 1- to 2-days of 8,000 steps exercise group and the 0-day group, as well as the reliance on only a week’s worth of data to infer 10 years’ mortality.
Although the data are consistent with previous observations that increased exercise volume reduces mortality, more research is needed, as the current study findings may not reflect other dimensions of health, including neurological health, they said.
Despite the need for cautious interpretation of the results, the current study “supports the emerging and popular idea that step counting, which does not require consideration of exercise duration or intensity, can offer guidance toward robust and favorable health outcomes,” and may inform step-based activity goals to improve public health, the editorialists wrote.
The study was supported by the Japan Agency for Medical Research and Development, the Japan Society for the Promotion of Science, the Japan Endocrine Society, and the Meiji Yasuda Life Foundation of Health and Welfare. Dr. Inoue also was supported by the Program for the Development of Next-Generation Leading Scientists With Global Insight sponsored by the Ministry of Education, Culture, Sports, Science and Technology, Japan. The other researchers had no relevant financial conflicts to disclose. The editorial authors had no financial conflicts to disclose.
Taking 8,000 steps or more for just 1 or 2 days a week was linked to a significant reduction in all-cause and cardiovascular mortality, according to a study of about 3,000 adults.
Previous research has shown lower mortality rates among individuals who walk consistently, especially those who log at least 8,000 steps daily, but the benefit of intense walking just once or twice a week on long-term health outcomes has not been examined, wrote Kosuke Inoue, MD, of Kyoto University, Japan, and colleagues.
In a study published in JAMA Network Open, the researchers reviewed 10-year follow-up data for 3,101 adults aged 20 years and older who were part of the 2005 and 2006 National Health and Nutrition Examination Survey (NHANES).
The participants were asked to wear accelerometers to track their steps for 7 consecutive days. The researchers assessed the dose-response relationship between days of taking 8,000 steps or more (about 4 miles) during 1 week, and the primary outcome of all-cause mortality risk after 10 years. Cardiovascular mortality risk after 10 years was a secondary outcome.
The mean age of the participants was 50.5 years and 51% were women. The breakdown by ethnicity was 51% White, 21% Black, 24% Hispanic, and 4% other races/ethnicities. A total of 632 individuals took 8,000 steps or more 0 days a week, 532 took at least 8,000 steps 1-2 days per week, and 1,937 took at least 8,000 steps 3-7 days a week.
During the 10-year follow-up period, overall all-cause mortality was 14.2% and cardiovascular mortality was 5.3% across all step groups.
In an adjusted analysis, individuals who took at least 8,000 steps 1-2 days a week had a 14.9% lower all-cause mortality risk compared with those who never reached 8,000 daily steps. This difference was similar to the 16.5% reduced mortality risk for those who took at least 8,000 steps 3-7 days a week.
Similarly, compared with the group with no days of at least 8,000 steps, cardiovascular mortality risk was 8.1% lower for those who took 8,000 steps 1-2 days per week and 8.4% lower for those who took at least 8,000 steps 3-7 days per week. The decreased mortality risk plateaued at 3-4 days.
These patterns in reduced all-cause mortality risk persisted in a stratified analysis by age (younger than 65 years and 65 years and older) and sex. Similar patterns in reduced mortality also emerged when the researchers used different thresholds of daily steps, such as a minimum of 10,000 steps instead of 8,000. The adjusted all-cause mortality for groups who took at least 10,000 steps 1-2 days a week, 3-7 days a week, and no days a week were 8.1%, 7.3%, and 16.7%, respectively, with corresponding cardiovascular mortality risks of 2.4%, 2.3%, and 7.0%, respectively.
“Given the simplicity and ease of counting daily steps, our findings indicate that the recommended number of steps taken on as few as 1 to 2 days per week may be a feasible option for individuals who are striving to achieve some health benefits through adhering to a recommended daily step count but are unable to accomplish this on a daily basis,” the researchers wrote in their discussion.
The findings were limited by several factors including the use daily step measures for 1 week only at baseline, with no data on how physical activity changes might impact mortality risk, the researchers noted. Other limitations included possible accelerometer error and misclassification of activity, possible selection bias, and lack of data on cause-specific mortality outside of cardiovascular death, they said.
However, the results were strengthened by the use of accelerometers as objective measures of activity and by the availability of 10-year follow-up data for nearly 100% of the participants, they said.
“Although our findings might suffer from residual confounding that should be addressed in future research, they suggest that people may receive substantial health benefits even if a sufficient number of steps are taken on only a couple days of the week,” they concluded.
Proceed with caution
The current study findings should be interpreted cautiously in light of the potential unmeasured confounding factors and selection bias that often occur in studies of physical activity, James Sawalla Guseh, MD, of Massachusetts General Hospital, and Jose F. Figueroa, MD, of Harvard T.H. Chan School of Public Health, Boston, wrote in an accompanying editorial.
The results support previous studies showing some longevity benefits with “weekend warrior” patterns of intense physical activity for only a couple of days; however, “the body of evidence for sporadic activity is not as robust as the evidence for sustained and regular aerobic activity,” the authors emphasized.
The editorial authors also highlighted the limitations of the current study, including the observational design and significant differences in demographics and comorbidities between the 1- to 2-days of 8,000 steps exercise group and the 0-day group, as well as the reliance on only a week’s worth of data to infer 10 years’ mortality.
Although the data are consistent with previous observations that increased exercise volume reduces mortality, more research is needed, as the current study findings may not reflect other dimensions of health, including neurological health, they said.
Despite the need for cautious interpretation of the results, the current study “supports the emerging and popular idea that step counting, which does not require consideration of exercise duration or intensity, can offer guidance toward robust and favorable health outcomes,” and may inform step-based activity goals to improve public health, the editorialists wrote.
The study was supported by the Japan Agency for Medical Research and Development, the Japan Society for the Promotion of Science, the Japan Endocrine Society, and the Meiji Yasuda Life Foundation of Health and Welfare. Dr. Inoue also was supported by the Program for the Development of Next-Generation Leading Scientists With Global Insight sponsored by the Ministry of Education, Culture, Sports, Science and Technology, Japan. The other researchers had no relevant financial conflicts to disclose. The editorial authors had no financial conflicts to disclose.
FROM JAMA NETWORK OPEN
Even small changes in fitness tied to lower mortality risk
Even relatively small changes in cardiorespiratory fitness (CRF) are associated with “considerable” impact on clinical symptoms and mortality risk among individuals with and without cardiovascular disease, new observational data in United States veterans suggest.
“We had a few surprises,” Peter Kokkinos, PhD, Robert Wood Johnson Medical School, New Brunswick, N. J., and the VA Medical Center, Washington, told this news organization. “First, the mortality risk was greatly attenuated in those who were moderate- and high-fit at baseline, despite a decline in fitness over time. In fact, in those with no CVD, the risk was not significantly elevated even when CRF declined by at least one MET [metabolic equivalent of task] for the moderate-fit and two or more METs for the high-fit group.”
“Second,” he said, “Our findings suggest that the impact of CRF on human health is not ephemeral, but rather carries a certain protection over time. Third, the changes in CRF necessary to impact mortality risk are relatively small (> 1.0 METs). This has a substantial clinical and public health significance.”
The study was published online in the Journal of the American College of Cardiology.
CRF up, mortality risk down
Dr. Kokkinos and colleagues analyzed data from 93,060 U.S. veterans; of these, 95% were men (mean age, 61.4 years) and 5% were women (mean age, 57.1 years). Overall, 72% of participants were White; 19.8%, African American; 5.2%, Hispanic; 1.9%, Native American, Asian, or Hawaiian; and 1.2%, unknown.
Participants were assigned to age-specific fitness quartiles based on peak METs achieved on a baseline exercise treadmill test (ETT). Each CRF quartile was stratified based on CRF changes (increase, decrease, no change) on the final ETT, with at least two ETT assessments at least 1 year apart.
The mean follow-up was 5.8 years (663,522 person-years), during which 18,302 deaths (19.7%) occurred, for an average annual mortality rate of 27.6 events per 1,000 person-years.
CRF was unchanged in 25.1% of the cohort, increased in 29.3%, and decreased in 45.6%. The trend was similar for those with and without CVD.
Significant differences were seen in all variables across CRF categories. In general, body weight, body mass index, CVD risk factors, and overall disease burden were progressively more unfavorable for those in the lowest CRF categories.
Conversely, medication use was progressively higher among those in low CRF categories.
After adjustment, higher CRF was inversely related to mortality risk for the entire cohort, with and without CVD. Cumulative survival rates across CRF categories declined progressively with increased fitness.
For patients with CVD (hazard ratio, 1.11), other significant predictors of all-cause mortality for patients were age (HR, 1.07), body mass index (HR, 0.98), chronic kidney disease (HR, 1.85), smoking (HR, 1.57), type 2 diabetes (HR, 1.42), hypertension (HR, 1.39), and cancers (HR, 1.37).
Generally, changes in CRF of at least 1.0 MET were associated with inverse and proportionate changes in mortality risk, regardless of baseline CRF status. For example, they note, a CRF decline of > 2.0 METs was associated with a 74% increased mortality risk for low-fit individuals with CVD, and a 69% increase for those without CVD.
A second analysis was done after excluding patients whose CRF declined and who died within 2 years of their last ETT, to account for the possibility that higher mortality rates and CRF declines were consequences of underlying disease (reverse causality). The association between changes in CRF and mortality risk persisted and remained similar to that observed in the entire cohort.
The authors add, “It is noteworthy that CRF increased by at least 1 MET in approximately 29% of the participants in the current study and decreased in approximately 46% of participants. This finding underscores the need to promote physical activity to maintain or increase CRF levels in middle-aged and older individuals.”
“Our findings make a persuasive argument that CRF is a strong and independent determinant of all-cause mortality risk, independent of genetic factors,” Dr. Kokkinos said. “We know that CRF is determined to some degree by genetic factors. However, improvements in aerobic capacity or CRF over time are largely the outcomes of regular engagement in aerobic activities of adequate intensity and volume.”
“Conversely,” he said, “a decline in CRF is likely the result of sedentary behavior, the onset of a chronic condition, or aging.”
If genetics were the sole contributor to mortality risk, then changes in CRF would not influence mortality risk, he concluded.
CRF impact “woefully underestimated”
Barry A. Franklin, PhD, past chair of both the American Heart Association’s Council on Physical Activity and Metabolism and the National Advocacy Committee, said the study substantiates previous smaller studies and is a “seminal” work.
“CRF is woefully underestimated as an index of health outcomes and survival,” said Dr. Franklin, director of preventive cardiology and cardiac rehabilitation at Beaumont Health in Royal Oak, Mich. “Moderate to vigorous physical activity should be regularly promoted by the medical community.”
Dr. Franklin’s recent review, published in Mayo Clinic Proceedings, provides evidence for other exercise benefits that clinicians may not be aware of, he noted. These include:
- Each 1 MET increase in CRF is generally associated with approximately 16% reduction in mortality.
- At any given risk factor profile or coronary calcium score, unfit people have 2-3 times the mortality as their fit counterparts.
- Fitness is inversely related to annual health care costs (each 1 MET increase in CRF is associated with approximately 6% lower annual health care costs).
- Physically active people hospitalized with acute coronary syndromes have better short-term outcomes (likely because of a phenomenon called ‘exercise preconditioning’).
- Fit people who undergo elective or emergent surgical procedures have better outcomes.
- Regular physical activity is a common characteristic in population subsets who routinely live into their 90s and to 100+.
Dr. Franklin had this advice for clinicians seeking to promote CRF increases of 1 MET or more among patients: “Sedentary people who embark on a walking program, who over time increase their walking speed to 3 mph or faster, invariably show at least a 1 MET increase in CRF during subsequent peak or symptom-limited treadmill testing.”
“Another general rule is that if an exercise program decreases heart rate at a given or fixed workload by about 10 beats per minute [bpm], the same treadmill workload that initially was accomplished at a heart rate of 120 bpm is now being accomplished at a heart rate of 110 bpm,” likely resulting in about a 1 MET increase in fitness.
“Accordingly,” he added, “a 20-bpm decrease would suggest a 2 MET increase in fitness!”
In a related editorial, Leonard A. Kaminsky, Ball State University, Muncie, Ind. and colleagues, write, “We agree with and believe the conclusion, reached by Kokkinos et al., bears repeating. We (again) call on both clinicians and public health professionals to adopt CRF as a key health indicator.”
“This should be done by coupling routine assessments of CRF with continued advocacy for promoting physical activity as an essential healthy lifestyle behavior,” they write.
No funding or relevant financial relationships were disclosed.
A version of this article first appeared on Medscape.com.
Even relatively small changes in cardiorespiratory fitness (CRF) are associated with “considerable” impact on clinical symptoms and mortality risk among individuals with and without cardiovascular disease, new observational data in United States veterans suggest.
“We had a few surprises,” Peter Kokkinos, PhD, Robert Wood Johnson Medical School, New Brunswick, N. J., and the VA Medical Center, Washington, told this news organization. “First, the mortality risk was greatly attenuated in those who were moderate- and high-fit at baseline, despite a decline in fitness over time. In fact, in those with no CVD, the risk was not significantly elevated even when CRF declined by at least one MET [metabolic equivalent of task] for the moderate-fit and two or more METs for the high-fit group.”
“Second,” he said, “Our findings suggest that the impact of CRF on human health is not ephemeral, but rather carries a certain protection over time. Third, the changes in CRF necessary to impact mortality risk are relatively small (> 1.0 METs). This has a substantial clinical and public health significance.”
The study was published online in the Journal of the American College of Cardiology.
CRF up, mortality risk down
Dr. Kokkinos and colleagues analyzed data from 93,060 U.S. veterans; of these, 95% were men (mean age, 61.4 years) and 5% were women (mean age, 57.1 years). Overall, 72% of participants were White; 19.8%, African American; 5.2%, Hispanic; 1.9%, Native American, Asian, or Hawaiian; and 1.2%, unknown.
Participants were assigned to age-specific fitness quartiles based on peak METs achieved on a baseline exercise treadmill test (ETT). Each CRF quartile was stratified based on CRF changes (increase, decrease, no change) on the final ETT, with at least two ETT assessments at least 1 year apart.
The mean follow-up was 5.8 years (663,522 person-years), during which 18,302 deaths (19.7%) occurred, for an average annual mortality rate of 27.6 events per 1,000 person-years.
CRF was unchanged in 25.1% of the cohort, increased in 29.3%, and decreased in 45.6%. The trend was similar for those with and without CVD.
Significant differences were seen in all variables across CRF categories. In general, body weight, body mass index, CVD risk factors, and overall disease burden were progressively more unfavorable for those in the lowest CRF categories.
Conversely, medication use was progressively higher among those in low CRF categories.
After adjustment, higher CRF was inversely related to mortality risk for the entire cohort, with and without CVD. Cumulative survival rates across CRF categories declined progressively with increased fitness.
For patients with CVD (hazard ratio, 1.11), other significant predictors of all-cause mortality for patients were age (HR, 1.07), body mass index (HR, 0.98), chronic kidney disease (HR, 1.85), smoking (HR, 1.57), type 2 diabetes (HR, 1.42), hypertension (HR, 1.39), and cancers (HR, 1.37).
Generally, changes in CRF of at least 1.0 MET were associated with inverse and proportionate changes in mortality risk, regardless of baseline CRF status. For example, they note, a CRF decline of > 2.0 METs was associated with a 74% increased mortality risk for low-fit individuals with CVD, and a 69% increase for those without CVD.
A second analysis was done after excluding patients whose CRF declined and who died within 2 years of their last ETT, to account for the possibility that higher mortality rates and CRF declines were consequences of underlying disease (reverse causality). The association between changes in CRF and mortality risk persisted and remained similar to that observed in the entire cohort.
The authors add, “It is noteworthy that CRF increased by at least 1 MET in approximately 29% of the participants in the current study and decreased in approximately 46% of participants. This finding underscores the need to promote physical activity to maintain or increase CRF levels in middle-aged and older individuals.”
“Our findings make a persuasive argument that CRF is a strong and independent determinant of all-cause mortality risk, independent of genetic factors,” Dr. Kokkinos said. “We know that CRF is determined to some degree by genetic factors. However, improvements in aerobic capacity or CRF over time are largely the outcomes of regular engagement in aerobic activities of adequate intensity and volume.”
“Conversely,” he said, “a decline in CRF is likely the result of sedentary behavior, the onset of a chronic condition, or aging.”
If genetics were the sole contributor to mortality risk, then changes in CRF would not influence mortality risk, he concluded.
CRF impact “woefully underestimated”
Barry A. Franklin, PhD, past chair of both the American Heart Association’s Council on Physical Activity and Metabolism and the National Advocacy Committee, said the study substantiates previous smaller studies and is a “seminal” work.
“CRF is woefully underestimated as an index of health outcomes and survival,” said Dr. Franklin, director of preventive cardiology and cardiac rehabilitation at Beaumont Health in Royal Oak, Mich. “Moderate to vigorous physical activity should be regularly promoted by the medical community.”
Dr. Franklin’s recent review, published in Mayo Clinic Proceedings, provides evidence for other exercise benefits that clinicians may not be aware of, he noted. These include:
- Each 1 MET increase in CRF is generally associated with approximately 16% reduction in mortality.
- At any given risk factor profile or coronary calcium score, unfit people have 2-3 times the mortality as their fit counterparts.
- Fitness is inversely related to annual health care costs (each 1 MET increase in CRF is associated with approximately 6% lower annual health care costs).
- Physically active people hospitalized with acute coronary syndromes have better short-term outcomes (likely because of a phenomenon called ‘exercise preconditioning’).
- Fit people who undergo elective or emergent surgical procedures have better outcomes.
- Regular physical activity is a common characteristic in population subsets who routinely live into their 90s and to 100+.
Dr. Franklin had this advice for clinicians seeking to promote CRF increases of 1 MET or more among patients: “Sedentary people who embark on a walking program, who over time increase their walking speed to 3 mph or faster, invariably show at least a 1 MET increase in CRF during subsequent peak or symptom-limited treadmill testing.”
“Another general rule is that if an exercise program decreases heart rate at a given or fixed workload by about 10 beats per minute [bpm], the same treadmill workload that initially was accomplished at a heart rate of 120 bpm is now being accomplished at a heart rate of 110 bpm,” likely resulting in about a 1 MET increase in fitness.
“Accordingly,” he added, “a 20-bpm decrease would suggest a 2 MET increase in fitness!”
In a related editorial, Leonard A. Kaminsky, Ball State University, Muncie, Ind. and colleagues, write, “We agree with and believe the conclusion, reached by Kokkinos et al., bears repeating. We (again) call on both clinicians and public health professionals to adopt CRF as a key health indicator.”
“This should be done by coupling routine assessments of CRF with continued advocacy for promoting physical activity as an essential healthy lifestyle behavior,” they write.
No funding or relevant financial relationships were disclosed.
A version of this article first appeared on Medscape.com.
Even relatively small changes in cardiorespiratory fitness (CRF) are associated with “considerable” impact on clinical symptoms and mortality risk among individuals with and without cardiovascular disease, new observational data in United States veterans suggest.
“We had a few surprises,” Peter Kokkinos, PhD, Robert Wood Johnson Medical School, New Brunswick, N. J., and the VA Medical Center, Washington, told this news organization. “First, the mortality risk was greatly attenuated in those who were moderate- and high-fit at baseline, despite a decline in fitness over time. In fact, in those with no CVD, the risk was not significantly elevated even when CRF declined by at least one MET [metabolic equivalent of task] for the moderate-fit and two or more METs for the high-fit group.”
“Second,” he said, “Our findings suggest that the impact of CRF on human health is not ephemeral, but rather carries a certain protection over time. Third, the changes in CRF necessary to impact mortality risk are relatively small (> 1.0 METs). This has a substantial clinical and public health significance.”
The study was published online in the Journal of the American College of Cardiology.
CRF up, mortality risk down
Dr. Kokkinos and colleagues analyzed data from 93,060 U.S. veterans; of these, 95% were men (mean age, 61.4 years) and 5% were women (mean age, 57.1 years). Overall, 72% of participants were White; 19.8%, African American; 5.2%, Hispanic; 1.9%, Native American, Asian, or Hawaiian; and 1.2%, unknown.
Participants were assigned to age-specific fitness quartiles based on peak METs achieved on a baseline exercise treadmill test (ETT). Each CRF quartile was stratified based on CRF changes (increase, decrease, no change) on the final ETT, with at least two ETT assessments at least 1 year apart.
The mean follow-up was 5.8 years (663,522 person-years), during which 18,302 deaths (19.7%) occurred, for an average annual mortality rate of 27.6 events per 1,000 person-years.
CRF was unchanged in 25.1% of the cohort, increased in 29.3%, and decreased in 45.6%. The trend was similar for those with and without CVD.
Significant differences were seen in all variables across CRF categories. In general, body weight, body mass index, CVD risk factors, and overall disease burden were progressively more unfavorable for those in the lowest CRF categories.
Conversely, medication use was progressively higher among those in low CRF categories.
After adjustment, higher CRF was inversely related to mortality risk for the entire cohort, with and without CVD. Cumulative survival rates across CRF categories declined progressively with increased fitness.
For patients with CVD (hazard ratio, 1.11), other significant predictors of all-cause mortality for patients were age (HR, 1.07), body mass index (HR, 0.98), chronic kidney disease (HR, 1.85), smoking (HR, 1.57), type 2 diabetes (HR, 1.42), hypertension (HR, 1.39), and cancers (HR, 1.37).
Generally, changes in CRF of at least 1.0 MET were associated with inverse and proportionate changes in mortality risk, regardless of baseline CRF status. For example, they note, a CRF decline of > 2.0 METs was associated with a 74% increased mortality risk for low-fit individuals with CVD, and a 69% increase for those without CVD.
A second analysis was done after excluding patients whose CRF declined and who died within 2 years of their last ETT, to account for the possibility that higher mortality rates and CRF declines were consequences of underlying disease (reverse causality). The association between changes in CRF and mortality risk persisted and remained similar to that observed in the entire cohort.
The authors add, “It is noteworthy that CRF increased by at least 1 MET in approximately 29% of the participants in the current study and decreased in approximately 46% of participants. This finding underscores the need to promote physical activity to maintain or increase CRF levels in middle-aged and older individuals.”
“Our findings make a persuasive argument that CRF is a strong and independent determinant of all-cause mortality risk, independent of genetic factors,” Dr. Kokkinos said. “We know that CRF is determined to some degree by genetic factors. However, improvements in aerobic capacity or CRF over time are largely the outcomes of regular engagement in aerobic activities of adequate intensity and volume.”
“Conversely,” he said, “a decline in CRF is likely the result of sedentary behavior, the onset of a chronic condition, or aging.”
If genetics were the sole contributor to mortality risk, then changes in CRF would not influence mortality risk, he concluded.
CRF impact “woefully underestimated”
Barry A. Franklin, PhD, past chair of both the American Heart Association’s Council on Physical Activity and Metabolism and the National Advocacy Committee, said the study substantiates previous smaller studies and is a “seminal” work.
“CRF is woefully underestimated as an index of health outcomes and survival,” said Dr. Franklin, director of preventive cardiology and cardiac rehabilitation at Beaumont Health in Royal Oak, Mich. “Moderate to vigorous physical activity should be regularly promoted by the medical community.”
Dr. Franklin’s recent review, published in Mayo Clinic Proceedings, provides evidence for other exercise benefits that clinicians may not be aware of, he noted. These include:
- Each 1 MET increase in CRF is generally associated with approximately 16% reduction in mortality.
- At any given risk factor profile or coronary calcium score, unfit people have 2-3 times the mortality as their fit counterparts.
- Fitness is inversely related to annual health care costs (each 1 MET increase in CRF is associated with approximately 6% lower annual health care costs).
- Physically active people hospitalized with acute coronary syndromes have better short-term outcomes (likely because of a phenomenon called ‘exercise preconditioning’).
- Fit people who undergo elective or emergent surgical procedures have better outcomes.
- Regular physical activity is a common characteristic in population subsets who routinely live into their 90s and to 100+.
Dr. Franklin had this advice for clinicians seeking to promote CRF increases of 1 MET or more among patients: “Sedentary people who embark on a walking program, who over time increase their walking speed to 3 mph or faster, invariably show at least a 1 MET increase in CRF during subsequent peak or symptom-limited treadmill testing.”
“Another general rule is that if an exercise program decreases heart rate at a given or fixed workload by about 10 beats per minute [bpm], the same treadmill workload that initially was accomplished at a heart rate of 120 bpm is now being accomplished at a heart rate of 110 bpm,” likely resulting in about a 1 MET increase in fitness.
“Accordingly,” he added, “a 20-bpm decrease would suggest a 2 MET increase in fitness!”
In a related editorial, Leonard A. Kaminsky, Ball State University, Muncie, Ind. and colleagues, write, “We agree with and believe the conclusion, reached by Kokkinos et al., bears repeating. We (again) call on both clinicians and public health professionals to adopt CRF as a key health indicator.”
“This should be done by coupling routine assessments of CRF with continued advocacy for promoting physical activity as an essential healthy lifestyle behavior,” they write.
No funding or relevant financial relationships were disclosed.
A version of this article first appeared on Medscape.com.
FROM THE JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY
Sports-related sudden cardiac arrest ‘extremely’ rare in women
Sports-related sudden cardiac arrest (Sr-SCA) appears to be extremely rare in women, compared with men, despite similar characteristics and circumstances of occurrence, data from three European population-based registries suggest.
“Our study shows that cardiac arrest during sports activities is up to 13 times less frequent in women, which means that the risk of sports-related cardiac arrest is substantially lower in women than in men. This tighter risk is consistent across all age subgroups and registries,” Orianne Weizman, MD, MPH, Université Paris Cité, said in an interview.
“Even if it is a nonconsensual suggestion, the question of risk-adapted screening in women must be asked,” Dr. Weizman and colleagues propose.
Their study was published online in the Journal of the American College of Cardiology.
Annual incidence
Among 34,826 cases of SCA in the registries that occurred in adults between 2006 and 2017, 760 (2.2%) were related to sports, and the vast majority occurred in men (706, 92.9%). Only 54 (7.1%) occurred in women.
Overall, the average annual incidence of Sr-SCA in women was 0.19 per million, compared with 2.63 per million in men (P < .0001).
When extrapolating to the total European population and accounting for age and sex, this translates into 98 expected cases of Sr-SCA each year in women versus 1,350 cases annually in men.
The average age of Sr-SCA was similar in women and men (59 years). Most cases occurred during moderate-vigorous physical activity, although data on the types of sports and time spent on sports per week or month were not defined.
However, the investigators note that women with Sr-SCA were more likely than men to be engaged in light or moderate physical activity at the time of arrest (17.5% vs. 4.2%) – suggesting a potential higher propensity for women to present with SCA at moderate workloads.
The incidence of Sr-SCA increased only slightly in postmenopausal women, while there was an 8-fold increase in men aged 60-74 years, relative to peers younger than 40 years.
History of heart disease was relatively uncommon in both men and women. Previous myocardial infarction was the most frequent preexisting condition in men (26.8%), whereas nonischemic heart disease (cardiomyopathy and valvular heart disease) was more frequent among women (29.0%).
Cardiovascular risk factors were frequently present in both men and women, with at least one factor present in two-thirds of the patients, regardless of sex.
Pulseless electrical activity and asystole were more common in women than in men (40.7% vs. 19.1%), as has been shown in previous studies of resuscitation from SCA in the general population. Ventricular tachycardia or fibrillation was the initial rhythm in 80.9% of men and 59.3% of women.
The cause of SCA was MI in 31.4% of women and 29.0% of men. Other cases were related to dilated cardiomyopathy (5.6% in women, 1.8% in men) or hypertrophic cardiomyopathy (1.9% in women, 1.3% in men). Electrical heart disease was found in two women (3.7%) and 15 men (2.1%).
In most cases (86%), one or more witnesses were present and assisted after the collapse. There was no significant difference between men and women in bystander response, time to defibrillation, and survival, which approached 60% at hospital discharge with early bystander cardiorespiratory resuscitation and automatic external defibrillator use.
A limitation of the study is a predominantly White European population, meaning that the findings may not be extrapolated to other populations.
Tailored screening?
“These findings raise questions about the causes of this extremely low risk, which are not yet clear, and the extent to which we should revise our pre-sport screening methods,” Dr. Weizman told this news organization.
“We suggest that extensive, routinely conducted screening in women would not be cost-effective because of the extremely rare incidence of serious events,” Dr. Weizman said.
What’s lacking, however, is sport-specific data on whether specific activities (endurance or resistance) would be more risky for women. Further information, particularly on the sports at highest risk for Sr-SCA in women, is needed to propose tailor-made screening algorithms, Dr. Weizman noted.
The value of preparticipation screening for occult heart disease beyond the history and physical examination has been debated, with some organizations recommending electrocardiogram in addition to baseline assessments.
But this can lead to false-positives, “with the anxiety and cost associated with additional testing,” Anne Curtis, MD, State University of New York at Buffalo, Buffalo General Medical Center, and Jan Tijssen, PhD, University of Amsterdam, write in a linked editorial.
Currently, the American Heart Association recommends screening before sports participation, with a focused personal and family history and physical examination.
Dr. Curtis told this news organization that the U.S. guidelines “should stay as they are, but if one were to change them, it would be important to recognize that male athletes are much more likely to suffer arrhythmic events during sports than female athletes.”
“That to me means that female athletes in particular should not need to have ECGs prior to sports participation unless the history and physical examination detects a potential problem that needs further investigation,” Dr. Curtis said.
“Both women and men should be screened for cardiovascular risk factors during routine primary care, with appropriate interventions for hypertension, hyperlipidemia, smoking, and other risk factors,” Dr. Curtis and Dr. Tijssen advise in their editorial.
“In asymptomatic individuals who wish to become more active, in most cases they should be given the green light to proceed, starting slow and increasing intensity/duration over time, without specific additional testing. This advice is particularly relevant for women, given the findings of the current and prior studies,” they add.
This research was funded by Horizon 2020 and COST Action PARQ, supported by the European Cooperation in Science and Technology. Additional support was provided by INSERM, University of Paris, Assistance Publique-Hôpitaux de Paris, Fondation Coeur et Artères, Global Heart Watch, Fédération Française de Cardiologie, Société Française de Cardiologie, Fondation Recherche Medicale, as well as unrestricted grants from industrial partners. The authors and Dr. Tijssen have declared no relevant financial relationships. Dr. Curtis has disclosed relationships with Janssen several pharmaceutical companies.
A version of this article first appeared on Medscape.com.
Sports-related sudden cardiac arrest (Sr-SCA) appears to be extremely rare in women, compared with men, despite similar characteristics and circumstances of occurrence, data from three European population-based registries suggest.
“Our study shows that cardiac arrest during sports activities is up to 13 times less frequent in women, which means that the risk of sports-related cardiac arrest is substantially lower in women than in men. This tighter risk is consistent across all age subgroups and registries,” Orianne Weizman, MD, MPH, Université Paris Cité, said in an interview.
“Even if it is a nonconsensual suggestion, the question of risk-adapted screening in women must be asked,” Dr. Weizman and colleagues propose.
Their study was published online in the Journal of the American College of Cardiology.
Annual incidence
Among 34,826 cases of SCA in the registries that occurred in adults between 2006 and 2017, 760 (2.2%) were related to sports, and the vast majority occurred in men (706, 92.9%). Only 54 (7.1%) occurred in women.
Overall, the average annual incidence of Sr-SCA in women was 0.19 per million, compared with 2.63 per million in men (P < .0001).
When extrapolating to the total European population and accounting for age and sex, this translates into 98 expected cases of Sr-SCA each year in women versus 1,350 cases annually in men.
The average age of Sr-SCA was similar in women and men (59 years). Most cases occurred during moderate-vigorous physical activity, although data on the types of sports and time spent on sports per week or month were not defined.
However, the investigators note that women with Sr-SCA were more likely than men to be engaged in light or moderate physical activity at the time of arrest (17.5% vs. 4.2%) – suggesting a potential higher propensity for women to present with SCA at moderate workloads.
The incidence of Sr-SCA increased only slightly in postmenopausal women, while there was an 8-fold increase in men aged 60-74 years, relative to peers younger than 40 years.
History of heart disease was relatively uncommon in both men and women. Previous myocardial infarction was the most frequent preexisting condition in men (26.8%), whereas nonischemic heart disease (cardiomyopathy and valvular heart disease) was more frequent among women (29.0%).
Cardiovascular risk factors were frequently present in both men and women, with at least one factor present in two-thirds of the patients, regardless of sex.
Pulseless electrical activity and asystole were more common in women than in men (40.7% vs. 19.1%), as has been shown in previous studies of resuscitation from SCA in the general population. Ventricular tachycardia or fibrillation was the initial rhythm in 80.9% of men and 59.3% of women.
The cause of SCA was MI in 31.4% of women and 29.0% of men. Other cases were related to dilated cardiomyopathy (5.6% in women, 1.8% in men) or hypertrophic cardiomyopathy (1.9% in women, 1.3% in men). Electrical heart disease was found in two women (3.7%) and 15 men (2.1%).
In most cases (86%), one or more witnesses were present and assisted after the collapse. There was no significant difference between men and women in bystander response, time to defibrillation, and survival, which approached 60% at hospital discharge with early bystander cardiorespiratory resuscitation and automatic external defibrillator use.
A limitation of the study is a predominantly White European population, meaning that the findings may not be extrapolated to other populations.
Tailored screening?
“These findings raise questions about the causes of this extremely low risk, which are not yet clear, and the extent to which we should revise our pre-sport screening methods,” Dr. Weizman told this news organization.
“We suggest that extensive, routinely conducted screening in women would not be cost-effective because of the extremely rare incidence of serious events,” Dr. Weizman said.
What’s lacking, however, is sport-specific data on whether specific activities (endurance or resistance) would be more risky for women. Further information, particularly on the sports at highest risk for Sr-SCA in women, is needed to propose tailor-made screening algorithms, Dr. Weizman noted.
The value of preparticipation screening for occult heart disease beyond the history and physical examination has been debated, with some organizations recommending electrocardiogram in addition to baseline assessments.
But this can lead to false-positives, “with the anxiety and cost associated with additional testing,” Anne Curtis, MD, State University of New York at Buffalo, Buffalo General Medical Center, and Jan Tijssen, PhD, University of Amsterdam, write in a linked editorial.
Currently, the American Heart Association recommends screening before sports participation, with a focused personal and family history and physical examination.
Dr. Curtis told this news organization that the U.S. guidelines “should stay as they are, but if one were to change them, it would be important to recognize that male athletes are much more likely to suffer arrhythmic events during sports than female athletes.”
“That to me means that female athletes in particular should not need to have ECGs prior to sports participation unless the history and physical examination detects a potential problem that needs further investigation,” Dr. Curtis said.
“Both women and men should be screened for cardiovascular risk factors during routine primary care, with appropriate interventions for hypertension, hyperlipidemia, smoking, and other risk factors,” Dr. Curtis and Dr. Tijssen advise in their editorial.
“In asymptomatic individuals who wish to become more active, in most cases they should be given the green light to proceed, starting slow and increasing intensity/duration over time, without specific additional testing. This advice is particularly relevant for women, given the findings of the current and prior studies,” they add.
This research was funded by Horizon 2020 and COST Action PARQ, supported by the European Cooperation in Science and Technology. Additional support was provided by INSERM, University of Paris, Assistance Publique-Hôpitaux de Paris, Fondation Coeur et Artères, Global Heart Watch, Fédération Française de Cardiologie, Société Française de Cardiologie, Fondation Recherche Medicale, as well as unrestricted grants from industrial partners. The authors and Dr. Tijssen have declared no relevant financial relationships. Dr. Curtis has disclosed relationships with Janssen several pharmaceutical companies.
A version of this article first appeared on Medscape.com.
Sports-related sudden cardiac arrest (Sr-SCA) appears to be extremely rare in women, compared with men, despite similar characteristics and circumstances of occurrence, data from three European population-based registries suggest.
“Our study shows that cardiac arrest during sports activities is up to 13 times less frequent in women, which means that the risk of sports-related cardiac arrest is substantially lower in women than in men. This tighter risk is consistent across all age subgroups and registries,” Orianne Weizman, MD, MPH, Université Paris Cité, said in an interview.
“Even if it is a nonconsensual suggestion, the question of risk-adapted screening in women must be asked,” Dr. Weizman and colleagues propose.
Their study was published online in the Journal of the American College of Cardiology.
Annual incidence
Among 34,826 cases of SCA in the registries that occurred in adults between 2006 and 2017, 760 (2.2%) were related to sports, and the vast majority occurred in men (706, 92.9%). Only 54 (7.1%) occurred in women.
Overall, the average annual incidence of Sr-SCA in women was 0.19 per million, compared with 2.63 per million in men (P < .0001).
When extrapolating to the total European population and accounting for age and sex, this translates into 98 expected cases of Sr-SCA each year in women versus 1,350 cases annually in men.
The average age of Sr-SCA was similar in women and men (59 years). Most cases occurred during moderate-vigorous physical activity, although data on the types of sports and time spent on sports per week or month were not defined.
However, the investigators note that women with Sr-SCA were more likely than men to be engaged in light or moderate physical activity at the time of arrest (17.5% vs. 4.2%) – suggesting a potential higher propensity for women to present with SCA at moderate workloads.
The incidence of Sr-SCA increased only slightly in postmenopausal women, while there was an 8-fold increase in men aged 60-74 years, relative to peers younger than 40 years.
History of heart disease was relatively uncommon in both men and women. Previous myocardial infarction was the most frequent preexisting condition in men (26.8%), whereas nonischemic heart disease (cardiomyopathy and valvular heart disease) was more frequent among women (29.0%).
Cardiovascular risk factors were frequently present in both men and women, with at least one factor present in two-thirds of the patients, regardless of sex.
Pulseless electrical activity and asystole were more common in women than in men (40.7% vs. 19.1%), as has been shown in previous studies of resuscitation from SCA in the general population. Ventricular tachycardia or fibrillation was the initial rhythm in 80.9% of men and 59.3% of women.
The cause of SCA was MI in 31.4% of women and 29.0% of men. Other cases were related to dilated cardiomyopathy (5.6% in women, 1.8% in men) or hypertrophic cardiomyopathy (1.9% in women, 1.3% in men). Electrical heart disease was found in two women (3.7%) and 15 men (2.1%).
In most cases (86%), one or more witnesses were present and assisted after the collapse. There was no significant difference between men and women in bystander response, time to defibrillation, and survival, which approached 60% at hospital discharge with early bystander cardiorespiratory resuscitation and automatic external defibrillator use.
A limitation of the study is a predominantly White European population, meaning that the findings may not be extrapolated to other populations.
Tailored screening?
“These findings raise questions about the causes of this extremely low risk, which are not yet clear, and the extent to which we should revise our pre-sport screening methods,” Dr. Weizman told this news organization.
“We suggest that extensive, routinely conducted screening in women would not be cost-effective because of the extremely rare incidence of serious events,” Dr. Weizman said.
What’s lacking, however, is sport-specific data on whether specific activities (endurance or resistance) would be more risky for women. Further information, particularly on the sports at highest risk for Sr-SCA in women, is needed to propose tailor-made screening algorithms, Dr. Weizman noted.
The value of preparticipation screening for occult heart disease beyond the history and physical examination has been debated, with some organizations recommending electrocardiogram in addition to baseline assessments.
But this can lead to false-positives, “with the anxiety and cost associated with additional testing,” Anne Curtis, MD, State University of New York at Buffalo, Buffalo General Medical Center, and Jan Tijssen, PhD, University of Amsterdam, write in a linked editorial.
Currently, the American Heart Association recommends screening before sports participation, with a focused personal and family history and physical examination.
Dr. Curtis told this news organization that the U.S. guidelines “should stay as they are, but if one were to change them, it would be important to recognize that male athletes are much more likely to suffer arrhythmic events during sports than female athletes.”
“That to me means that female athletes in particular should not need to have ECGs prior to sports participation unless the history and physical examination detects a potential problem that needs further investigation,” Dr. Curtis said.
“Both women and men should be screened for cardiovascular risk factors during routine primary care, with appropriate interventions for hypertension, hyperlipidemia, smoking, and other risk factors,” Dr. Curtis and Dr. Tijssen advise in their editorial.
“In asymptomatic individuals who wish to become more active, in most cases they should be given the green light to proceed, starting slow and increasing intensity/duration over time, without specific additional testing. This advice is particularly relevant for women, given the findings of the current and prior studies,” they add.
This research was funded by Horizon 2020 and COST Action PARQ, supported by the European Cooperation in Science and Technology. Additional support was provided by INSERM, University of Paris, Assistance Publique-Hôpitaux de Paris, Fondation Coeur et Artères, Global Heart Watch, Fédération Française de Cardiologie, Société Française de Cardiologie, Fondation Recherche Medicale, as well as unrestricted grants from industrial partners. The authors and Dr. Tijssen have declared no relevant financial relationships. Dr. Curtis has disclosed relationships with Janssen several pharmaceutical companies.
A version of this article first appeared on Medscape.com.
FDA expands evinacumab approval to younger kids with HoFH
The U.S. Food and Drug Administration has expanded the indicated age range for evinacumab-dgnb (Evkeeza, Regeneron Pharmaceuticals), which was approved 2 years ago as an adjunct to other lipid-lowering therapies for homozygous familial hypercholesterolemia (HoFH) in patients aged 12 and older.
The antibody-based agent’s indication now also covers patients aged 5-11 years with the rare genetic disorder, Regeneron announced. It blocks angiopoietin-like 3 (ANGPTL3), inhibiting lipoprotein lipase and endothelial lipase, thereby cutting LDL-cholesterol levels by mechanisms not directly involving the LDL receptor.
The expanded indication is based on a study that saw a 48% drop in LDL-cholesterol levels over 24 weeks, the primary endpoint, across 20 HoFH patients aged 5-11 years who received evinacumab-dgnb on top of maximally tolerated standard lipid-modifying therapy, the company reports.
Levels of apolipoprotein B, non-HDL cholesterol, and total cholesterol also fell significantly in the trial, which was completed in January.
The drug’s efficacy and safety resembled those of a previously reported larger study of patients with HoFH aged 12 years and older (mean age about 40 years) that led to its initial approval.
“The safety and effectiveness of Evkeeza have not been established in patients with other causes of hypercholesterolemia, including those with heterozygous familial hypercholesterolemia,” the company states. Nor is it known whether the drug affects clinical outcomes.
A version of this article first appeared on Medscape.com.
The U.S. Food and Drug Administration has expanded the indicated age range for evinacumab-dgnb (Evkeeza, Regeneron Pharmaceuticals), which was approved 2 years ago as an adjunct to other lipid-lowering therapies for homozygous familial hypercholesterolemia (HoFH) in patients aged 12 and older.
The antibody-based agent’s indication now also covers patients aged 5-11 years with the rare genetic disorder, Regeneron announced. It blocks angiopoietin-like 3 (ANGPTL3), inhibiting lipoprotein lipase and endothelial lipase, thereby cutting LDL-cholesterol levels by mechanisms not directly involving the LDL receptor.
The expanded indication is based on a study that saw a 48% drop in LDL-cholesterol levels over 24 weeks, the primary endpoint, across 20 HoFH patients aged 5-11 years who received evinacumab-dgnb on top of maximally tolerated standard lipid-modifying therapy, the company reports.
Levels of apolipoprotein B, non-HDL cholesterol, and total cholesterol also fell significantly in the trial, which was completed in January.
The drug’s efficacy and safety resembled those of a previously reported larger study of patients with HoFH aged 12 years and older (mean age about 40 years) that led to its initial approval.
“The safety and effectiveness of Evkeeza have not been established in patients with other causes of hypercholesterolemia, including those with heterozygous familial hypercholesterolemia,” the company states. Nor is it known whether the drug affects clinical outcomes.
A version of this article first appeared on Medscape.com.
The U.S. Food and Drug Administration has expanded the indicated age range for evinacumab-dgnb (Evkeeza, Regeneron Pharmaceuticals), which was approved 2 years ago as an adjunct to other lipid-lowering therapies for homozygous familial hypercholesterolemia (HoFH) in patients aged 12 and older.
The antibody-based agent’s indication now also covers patients aged 5-11 years with the rare genetic disorder, Regeneron announced. It blocks angiopoietin-like 3 (ANGPTL3), inhibiting lipoprotein lipase and endothelial lipase, thereby cutting LDL-cholesterol levels by mechanisms not directly involving the LDL receptor.
The expanded indication is based on a study that saw a 48% drop in LDL-cholesterol levels over 24 weeks, the primary endpoint, across 20 HoFH patients aged 5-11 years who received evinacumab-dgnb on top of maximally tolerated standard lipid-modifying therapy, the company reports.
Levels of apolipoprotein B, non-HDL cholesterol, and total cholesterol also fell significantly in the trial, which was completed in January.
The drug’s efficacy and safety resembled those of a previously reported larger study of patients with HoFH aged 12 years and older (mean age about 40 years) that led to its initial approval.
“The safety and effectiveness of Evkeeza have not been established in patients with other causes of hypercholesterolemia, including those with heterozygous familial hypercholesterolemia,” the company states. Nor is it known whether the drug affects clinical outcomes.
A version of this article first appeared on Medscape.com.