Thrombosis

NEW ORLEANS – For patients with atrial fibrillation and either a recent acute coronary syndrome or percutaneous coronary intervention, combined treatment for 6 months with the anticoagulant apixaban and a P2Y12 inhibitor antiplatelet drug, but without aspirin, was safer than and as effective as a regimen that either also included aspirin or that substituted a vitamin K antagonist, such as warfarin, for the direct-acting oral anticoagulant, based on results from a multicenter, randomized trial with more than 4,600 patients.

The apixaban plus P2Y12 inhibitor (typically, clopidogrel) combination “resulted in less bleeding and fewer hospitalizations without significant differences in ischemic events than regimens that included a vitamin K antagonist, aspirin, or both,” Renato D. Lopes, MD, said at the annual meeting of the American College of Cardiology. Concurrently, his report of the results also appeared in an online article.

This finding in the AUGUSTUS trial gives clinicians more guidance for the long-standing dilemma of how to best prevent arterial thrombus formation in patients with atrial fibrillation (AFib). To prevent a stroke, these patients routinely receive treatment with an anticoagulant when they have an acute coronary syndrome (ACS) event or undergo percutaneous coronary intervention (PCI). Typically, they receive several months of dual antiplatelet therapy with aspirin plus a P2Y12 inhibitor to prevent a clot from forming in the stented or unstable region of a coronary artery.

These patients are not uncommon; this circumstance occurs for about 20% of all AFib patients, and poses the question of what is the safest and most effective way to treat them. Should they get triple therapy with an anticoagulant, aspirin, and a P2Y12 inhibitor, an option that could cause excess bleeding; or should one of the three drugs drop out with the potential for an increased rate of ischemic events? The AUGUSTUS findings suggest that one solution is treatment with a combination of the direct-acting oral anticoagulant apixaban (Eliquis) and the P2Y12 inhibitor clopidogrel (Plavix) but without aspirin.

For the majority of patients like the ones enrolled, “less is more.” By dropping aspirin from the treatment mix, patients did better, said Dr. Lopes, a professor of medicine at Duke University in Durham, N.C.

Dr. Lopes and his associates designed AUGUSTUS (A Study of Apixaban in Patients With Atrial Fibrillation, Not Caused by a Heart Valve Problem, Who Are at Risk for Thrombosis [Blood Clots] Due to Having Had a Recent Coronary Event, Such as a Heart Attack or a Procedure to Open the Vessels of the Heart) as a two-by-two factorial study to address two different questions: During 6 months of treatment, how did apixaban compare with a vitamin K antagonist (usually warfarin) in these patients for safety and efficacy, and how did aspirin compare with placebo in this setting for the same endpoints?

The trial enrolled 4,614 patients at 492 sites in 33 countries. All patients in the study received a P2Y12 inhibitor, with 93% treated with clopidogrel. The study had roughly as many patients as the combined total of patients enrolled in two smaller, prior studies that had looked at roughly the same questions in similar patients.

“The aspirin part is the more interesting, and probably more unique and important finding,” John H. Alexander, MD, a coinvestigator on the study, said in a video interview. Regardless of the anticoagulant used, patients who received aspirin had a 16% rate of major bleeds or clinically relevant non-major bleeds, compared with a 9% rate among those on placebo, a statistically significant result that underscored the bleeding risk posed by adding aspirin to an anticoagulant and a P2Y12 inhibitor.

The results also showed no statistically significant difference in any efficacy measure with or without aspirin, including the rate of death or hospitalization, or of any individual ischemic endpoint. However the results showed a signal of a small increase in the rates of each of three types of ischemic events – stent thrombosis, MI, and need for urgent revascularization, each of which showed a numerical increase when aspirin was dropped. But the increase was small.

Dr. Lopes calculated that, for example, to prevent one episode of stent thrombosis by treating with aspirin also would cause 15 major or clinically relevant non-major bleeds, which makes inclusion of aspirin something of a judgment call for each patient, said Dr. Alexander, a professor of medicine at Duke. An AFib patient with a high risk for thrombosis but a low risk for bleeding following PCI or an ACS event might be a reasonable patient to treat with aspirin along with apixaban and a P2Y12 inhibitor, he explained.

The rate of major or clinically relevant bleeds was 11% with apixaban and 15% with a vitamin K antagonist, a statistically significant difference. Patients treated with apixaban also had a significantly reduced rate of death or hospitalization, 24%, compared with 27% among those on the vitamin K antagonist, as well as a significantly lower rate of stroke.

Overall the lowest bleeding rate was in patients on apixaban but no aspirin, a 7% rate, while the highest rate was in patients on a vitamin K antagonist plus aspirin, a 19% rate.

Dr. Alexander said that it would be an overreach to extrapolate these findings to other direct-acting oral anticoagulants, compared with a vitamin K antagonist, but he believed that the findings the study generated about aspirin were probably relevant regardless of the anticoagulant used.
 

[email protected]

On Twitter @mitchelzoler

NEW ORLEANS – For patients with atrial fibrillation and either a recent acute coronary syndrome or percutaneous coronary intervention, combined treatment for 6 months with the anticoagulant apixaban and a P2Y12 inhibitor antiplatelet drug, but without aspirin, was safer than and as effective as a regimen that either also included aspirin or that substituted a vitamin K antagonist, such as warfarin, for the direct-acting oral anticoagulant, based on results from a multicenter, randomized trial with more than 4,600 patients.

The apixaban plus P2Y12 inhibitor (typically, clopidogrel) combination “resulted in less bleeding and fewer hospitalizations without significant differences in ischemic events than regimens that included a vitamin K antagonist, aspirin, or both,” Renato D. Lopes, MD, said at the annual meeting of the American College of Cardiology. Concurrently, his report of the results also appeared in an online article.

This finding in the AUGUSTUS trial gives clinicians more guidance for the long-standing dilemma of how to best prevent arterial thrombus formation in patients with atrial fibrillation (AFib). To prevent a stroke, these patients routinely receive treatment with an anticoagulant when they have an acute coronary syndrome (ACS) event or undergo percutaneous coronary intervention (PCI). Typically, they receive several months of dual antiplatelet therapy with aspirin plus a P2Y12 inhibitor to prevent a clot from forming in the stented or unstable region of a coronary artery.

These patients are not uncommon; this circumstance occurs for about 20% of all AFib patients, and poses the question of what is the safest and most effective way to treat them. Should they get triple therapy with an anticoagulant, aspirin, and a P2Y12 inhibitor, an option that could cause excess bleeding; or should one of the three drugs drop out with the potential for an increased rate of ischemic events? The AUGUSTUS findings suggest that one solution is treatment with a combination of the direct-acting oral anticoagulant apixaban (Eliquis) and the P2Y12 inhibitor clopidogrel (Plavix) but without aspirin.

For the majority of patients like the ones enrolled, “less is more.” By dropping aspirin from the treatment mix, patients did better, said Dr. Lopes, a professor of medicine at Duke University in Durham, N.C.

Dr. Lopes and his associates designed AUGUSTUS (A Study of Apixaban in Patients With Atrial Fibrillation, Not Caused by a Heart Valve Problem, Who Are at Risk for Thrombosis [Blood Clots] Due to Having Had a Recent Coronary Event, Such as a Heart Attack or a Procedure to Open the Vessels of the Heart) as a two-by-two factorial study to address two different questions: During 6 months of treatment, how did apixaban compare with a vitamin K antagonist (usually warfarin) in these patients for safety and efficacy, and how did aspirin compare with placebo in this setting for the same endpoints?

The trial enrolled 4,614 patients at 492 sites in 33 countries. All patients in the study received a P2Y12 inhibitor, with 93% treated with clopidogrel. The study had roughly as many patients as the combined total of patients enrolled in two smaller, prior studies that had looked at roughly the same questions in similar patients.

“The aspirin part is the more interesting, and probably more unique and important finding,” John H. Alexander, MD, a coinvestigator on the study, said in a video interview. Regardless of the anticoagulant used, patients who received aspirin had a 16% rate of major bleeds or clinically relevant non-major bleeds, compared with a 9% rate among those on placebo, a statistically significant result that underscored the bleeding risk posed by adding aspirin to an anticoagulant and a P2Y12 inhibitor.

The results also showed no statistically significant difference in any efficacy measure with or without aspirin, including the rate of death or hospitalization, or of any individual ischemic endpoint. However the results showed a signal of a small increase in the rates of each of three types of ischemic events – stent thrombosis, MI, and need for urgent revascularization, each of which showed a numerical increase when aspirin was dropped. But the increase was small.

Dr. Lopes calculated that, for example, to prevent one episode of stent thrombosis by treating with aspirin also would cause 15 major or clinically relevant non-major bleeds, which makes inclusion of aspirin something of a judgment call for each patient, said Dr. Alexander, a professor of medicine at Duke. An AFib patient with a high risk for thrombosis but a low risk for bleeding following PCI or an ACS event might be a reasonable patient to treat with aspirin along with apixaban and a P2Y12 inhibitor, he explained.

The rate of major or clinically relevant bleeds was 11% with apixaban and 15% with a vitamin K antagonist, a statistically significant difference. Patients treated with apixaban also had a significantly reduced rate of death or hospitalization, 24%, compared with 27% among those on the vitamin K antagonist, as well as a significantly lower rate of stroke.

Overall the lowest bleeding rate was in patients on apixaban but no aspirin, a 7% rate, while the highest rate was in patients on a vitamin K antagonist plus aspirin, a 19% rate.

Dr. Alexander said that it would be an overreach to extrapolate these findings to other direct-acting oral anticoagulants, compared with a vitamin K antagonist, but he believed that the findings the study generated about aspirin were probably relevant regardless of the anticoagulant used.
 

[email protected]

On Twitter @mitchelzoler

NEW ORLEANS – For patients with atrial fibrillation and either a recent acute coronary syndrome or percutaneous coronary intervention, combined treatment for 6 months with the anticoagulant apixaban and a P2Y12 inhibitor antiplatelet drug, but without aspirin, was safer than and as effective as a regimen that either also included aspirin or that substituted a vitamin K antagonist, such as warfarin, for the direct-acting oral anticoagulant, based on results from a multicenter, randomized trial with more than 4,600 patients.

The apixaban plus P2Y12 inhibitor (typically, clopidogrel) combination “resulted in less bleeding and fewer hospitalizations without significant differences in ischemic events than regimens that included a vitamin K antagonist, aspirin, or both,” Renato D. Lopes, MD, said at the annual meeting of the American College of Cardiology. Concurrently, his report of the results also appeared in an online article.

This finding in the AUGUSTUS trial gives clinicians more guidance for the long-standing dilemma of how to best prevent arterial thrombus formation in patients with atrial fibrillation (AFib). To prevent a stroke, these patients routinely receive treatment with an anticoagulant when they have an acute coronary syndrome (ACS) event or undergo percutaneous coronary intervention (PCI). Typically, they receive several months of dual antiplatelet therapy with aspirin plus a P2Y12 inhibitor to prevent a clot from forming in the stented or unstable region of a coronary artery.

These patients are not uncommon; this circumstance occurs for about 20% of all AFib patients, and poses the question of what is the safest and most effective way to treat them. Should they get triple therapy with an anticoagulant, aspirin, and a P2Y12 inhibitor, an option that could cause excess bleeding; or should one of the three drugs drop out with the potential for an increased rate of ischemic events? The AUGUSTUS findings suggest that one solution is treatment with a combination of the direct-acting oral anticoagulant apixaban (Eliquis) and the P2Y12 inhibitor clopidogrel (Plavix) but without aspirin.

For the majority of patients like the ones enrolled, “less is more.” By dropping aspirin from the treatment mix, patients did better, said Dr. Lopes, a professor of medicine at Duke University in Durham, N.C.

Dr. Lopes and his associates designed AUGUSTUS (A Study of Apixaban in Patients With Atrial Fibrillation, Not Caused by a Heart Valve Problem, Who Are at Risk for Thrombosis [Blood Clots] Due to Having Had a Recent Coronary Event, Such as a Heart Attack or a Procedure to Open the Vessels of the Heart) as a two-by-two factorial study to address two different questions: During 6 months of treatment, how did apixaban compare with a vitamin K antagonist (usually warfarin) in these patients for safety and efficacy, and how did aspirin compare with placebo in this setting for the same endpoints?

The trial enrolled 4,614 patients at 492 sites in 33 countries. All patients in the study received a P2Y12 inhibitor, with 93% treated with clopidogrel. The study had roughly as many patients as the combined total of patients enrolled in two smaller, prior studies that had looked at roughly the same questions in similar patients.

“The aspirin part is the more interesting, and probably more unique and important finding,” John H. Alexander, MD, a coinvestigator on the study, said in a video interview. Regardless of the anticoagulant used, patients who received aspirin had a 16% rate of major bleeds or clinically relevant non-major bleeds, compared with a 9% rate among those on placebo, a statistically significant result that underscored the bleeding risk posed by adding aspirin to an anticoagulant and a P2Y12 inhibitor.

The results also showed no statistically significant difference in any efficacy measure with or without aspirin, including the rate of death or hospitalization, or of any individual ischemic endpoint. However the results showed a signal of a small increase in the rates of each of three types of ischemic events – stent thrombosis, MI, and need for urgent revascularization, each of which showed a numerical increase when aspirin was dropped. But the increase was small.

Dr. Lopes calculated that, for example, to prevent one episode of stent thrombosis by treating with aspirin also would cause 15 major or clinically relevant non-major bleeds, which makes inclusion of aspirin something of a judgment call for each patient, said Dr. Alexander, a professor of medicine at Duke. An AFib patient with a high risk for thrombosis but a low risk for bleeding following PCI or an ACS event might be a reasonable patient to treat with aspirin along with apixaban and a P2Y12 inhibitor, he explained.

The rate of major or clinically relevant bleeds was 11% with apixaban and 15% with a vitamin K antagonist, a statistically significant difference. Patients treated with apixaban also had a significantly reduced rate of death or hospitalization, 24%, compared with 27% among those on the vitamin K antagonist, as well as a significantly lower rate of stroke.

Overall the lowest bleeding rate was in patients on apixaban but no aspirin, a 7% rate, while the highest rate was in patients on a vitamin K antagonist plus aspirin, a 19% rate.

Dr. Alexander said that it would be an overreach to extrapolate these findings to other direct-acting oral anticoagulants, compared with a vitamin K antagonist, but he believed that the findings the study generated about aspirin were probably relevant regardless of the anticoagulant used.
 

[email protected]

On Twitter @mitchelzoler

HONOLULU – Andexanet alfa rapidly reverses factor Xa inhibition and effectively establishes hemostasis in patients with acute major bleeding, according to a study presented at the International Stroke Conference sponsored by the American Heart Association. The medication is associated with a low rate of mortality resulting from intracerebral hemorrhage (ICH), compared with the general population of patients with ICH receiving anticoagulation.

Factor Xa inhibitors such as apixaban and rivaroxaban effectively prevent thromboembolic events but may cause or exacerbate acute major bleeding. Andexanet alfa, a modified, recombinant, inactive form of human factor Xa, was developed and approved as a reversal agent for factor Xa inhibitors. In a 2015 study, andexanet rapidly and safely reversed anti–factor Xa activity in large cohorts of patients without bleeding.
 

A single-cohort study

Truman John Milling Jr., MD, an emergency medicine physician at Dell Seton Medical Center at the University of Texas in Austin, and his colleagues conducted the Andexanet Alfa, a Novel Antidote to the Anticoagulation Effects of Factor Xa Inhibitors (ANNEXA-4) study to evaluate the drug’s safety and efficacy in patients with acute major bleeding associated with treatment with a factor Xa inhibitor. For participants to be eligible, their bleeding had to be life threatening with signs of hemodynamic compromise, be associated with a decrease in hemoglobin level of at least 2 g/dL, or occur in a critical organ such as the brain. An independent academic committee determined whether patients met these criteria.

The trial’s primary efficacy outcomes were change from baseline in anti–factor Xa activity and the percentage of patients with excellent or good hemostatic efficacy at 12 hours. The primary safety endpoints were death, thrombotic events, and the development of neutralizing antibodies to andexanet or to native factor X and factor Xa. The efficacy population included patients with major bleeding and baseline anti–factor Xa activity of at least 75 ng/mL. The safety population included all patients who received a dose of andexanet. The independent committee adjudicated the efficacy and safety outcomes.
 

Hemostasis was sustained for 12 hours

The investigators enrolled 352 participants into the study, all of whom received andexanet and were followed for at least 30 days or until death. The population’s mean age was 77 years. “These were older and sicker patients with a significant amount of comorbid disease,” said Dr. Milling. The primary indication for anticoagulation was atrial fibrillation in 80% of patients. The primary site of bleeding was intracranial in 64% of patients and gastrointestinal in 26% of patients. The remaining 10% of patients had bleeding affecting other areas (such as pericardial or intramuscular bleeding).

The investigators included 254 patients in the efficacy population. At the end of the administration of the andexanet bolus, the median value for anti–factor Xa activity decreased by 92% among participants receiving apixaban, 92% among participants receiving rivaroxaban, and 75% among patients receiving enoxaparin. Among patients receiving apixaban, the median value for anti–factor Xa activity was decreased by 32% at 4 hours, 34% at 8 hours, and 38% at 12 hours. Among patients receiving rivaroxaban, the median value for anti–factor Xa activity was decreased by 42% at 4 hours, 48% at 8 hours, and 62% at 12 hours.

Dr. Milling and his colleagues assessed hemostatic efficacy in 249 patients. Of this group, 82% achieved good or excellent hemostasis. Among participants with good or excellent hemostasis, 84% had excellent results, and 16% had good results. Subanalysis by factor Xa inhibitor, type of bleed, age, and dose of andexanet did not alter the findings significantly.

To determine whether hemostasis had been sustained sufficiently to prevent clinical deterioration, the investigators examined 71 patients with ICH and a single-compartment bleed. From 1 hour to 12 hours, one patient’s outcome changed from excellent/good to poor/none, and one patient’s outcome changed from excellent to good. For the majority of these patients, however, good hemostasis was sustained from 1 to 12 hours.

The rate of thromboembolic events was 9.7%, which is in the expected range for this population, said Dr. Milling. These events were distributed evenly among the 4 weeks of the study. Stroke and deep vein thrombosis accounted for most of these events, and pulmonary emboli and heart attacks occurred as well. “Once we restarted oral anticoagulation ... there were no more thrombotic events,” said Dr. Milling. No patient developed neutralizing antibodies to factor X or factor Xa, nor did any patient develop neutralizing antibodies to andexanet.

The overall mortality rate was 13.9%. The rate of mortality resulting from ICH was 15%, and the rate of mortality resulting from gastrointestinal bleeding was 11%. These results are impressive, considering that patients had received anticoagulants, said Dr. Milling.

Portola Pharmaceuticals, the maker of andexanet alfa, funded the study. Dr. Milling reported receiving funding and honoraria from the Population Health Research Institute at McMasters University, Janssen, CSL Behring, and Octapharma. He also received a small research payment from Portola Pharmaceuticals. Several of the investigators reported receiving funding from Portola Pharmaceuticals.

[email protected]

SOURCE: Milling TJ et al. ISC 2019, Abstract LB7.

HONOLULU – Andexanet alfa rapidly reverses factor Xa inhibition and effectively establishes hemostasis in patients with acute major bleeding, according to a study presented at the International Stroke Conference sponsored by the American Heart Association. The medication is associated with a low rate of mortality resulting from intracerebral hemorrhage (ICH), compared with the general population of patients with ICH receiving anticoagulation.

Factor Xa inhibitors such as apixaban and rivaroxaban effectively prevent thromboembolic events but may cause or exacerbate acute major bleeding. Andexanet alfa, a modified, recombinant, inactive form of human factor Xa, was developed and approved as a reversal agent for factor Xa inhibitors. In a 2015 study, andexanet rapidly and safely reversed anti–factor Xa activity in large cohorts of patients without bleeding.
 

A single-cohort study

Truman John Milling Jr., MD, an emergency medicine physician at Dell Seton Medical Center at the University of Texas in Austin, and his colleagues conducted the Andexanet Alfa, a Novel Antidote to the Anticoagulation Effects of Factor Xa Inhibitors (ANNEXA-4) study to evaluate the drug’s safety and efficacy in patients with acute major bleeding associated with treatment with a factor Xa inhibitor. For participants to be eligible, their bleeding had to be life threatening with signs of hemodynamic compromise, be associated with a decrease in hemoglobin level of at least 2 g/dL, or occur in a critical organ such as the brain. An independent academic committee determined whether patients met these criteria.

The trial’s primary efficacy outcomes were change from baseline in anti–factor Xa activity and the percentage of patients with excellent or good hemostatic efficacy at 12 hours. The primary safety endpoints were death, thrombotic events, and the development of neutralizing antibodies to andexanet or to native factor X and factor Xa. The efficacy population included patients with major bleeding and baseline anti–factor Xa activity of at least 75 ng/mL. The safety population included all patients who received a dose of andexanet. The independent committee adjudicated the efficacy and safety outcomes.
 

Hemostasis was sustained for 12 hours

The investigators enrolled 352 participants into the study, all of whom received andexanet and were followed for at least 30 days or until death. The population’s mean age was 77 years. “These were older and sicker patients with a significant amount of comorbid disease,” said Dr. Milling. The primary indication for anticoagulation was atrial fibrillation in 80% of patients. The primary site of bleeding was intracranial in 64% of patients and gastrointestinal in 26% of patients. The remaining 10% of patients had bleeding affecting other areas (such as pericardial or intramuscular bleeding).

The investigators included 254 patients in the efficacy population. At the end of the administration of the andexanet bolus, the median value for anti–factor Xa activity decreased by 92% among participants receiving apixaban, 92% among participants receiving rivaroxaban, and 75% among patients receiving enoxaparin. Among patients receiving apixaban, the median value for anti–factor Xa activity was decreased by 32% at 4 hours, 34% at 8 hours, and 38% at 12 hours. Among patients receiving rivaroxaban, the median value for anti–factor Xa activity was decreased by 42% at 4 hours, 48% at 8 hours, and 62% at 12 hours.

Dr. Milling and his colleagues assessed hemostatic efficacy in 249 patients. Of this group, 82% achieved good or excellent hemostasis. Among participants with good or excellent hemostasis, 84% had excellent results, and 16% had good results. Subanalysis by factor Xa inhibitor, type of bleed, age, and dose of andexanet did not alter the findings significantly.

To determine whether hemostasis had been sustained sufficiently to prevent clinical deterioration, the investigators examined 71 patients with ICH and a single-compartment bleed. From 1 hour to 12 hours, one patient’s outcome changed from excellent/good to poor/none, and one patient’s outcome changed from excellent to good. For the majority of these patients, however, good hemostasis was sustained from 1 to 12 hours.

The rate of thromboembolic events was 9.7%, which is in the expected range for this population, said Dr. Milling. These events were distributed evenly among the 4 weeks of the study. Stroke and deep vein thrombosis accounted for most of these events, and pulmonary emboli and heart attacks occurred as well. “Once we restarted oral anticoagulation ... there were no more thrombotic events,” said Dr. Milling. No patient developed neutralizing antibodies to factor X or factor Xa, nor did any patient develop neutralizing antibodies to andexanet.

The overall mortality rate was 13.9%. The rate of mortality resulting from ICH was 15%, and the rate of mortality resulting from gastrointestinal bleeding was 11%. These results are impressive, considering that patients had received anticoagulants, said Dr. Milling.

Portola Pharmaceuticals, the maker of andexanet alfa, funded the study. Dr. Milling reported receiving funding and honoraria from the Population Health Research Institute at McMasters University, Janssen, CSL Behring, and Octapharma. He also received a small research payment from Portola Pharmaceuticals. Several of the investigators reported receiving funding from Portola Pharmaceuticals.

[email protected]

SOURCE: Milling TJ et al. ISC 2019, Abstract LB7.

HONOLULU – Andexanet alfa rapidly reverses factor Xa inhibition and effectively establishes hemostasis in patients with acute major bleeding, according to a study presented at the International Stroke Conference sponsored by the American Heart Association. The medication is associated with a low rate of mortality resulting from intracerebral hemorrhage (ICH), compared with the general population of patients with ICH receiving anticoagulation.

Factor Xa inhibitors such as apixaban and rivaroxaban effectively prevent thromboembolic events but may cause or exacerbate acute major bleeding. Andexanet alfa, a modified, recombinant, inactive form of human factor Xa, was developed and approved as a reversal agent for factor Xa inhibitors. In a 2015 study, andexanet rapidly and safely reversed anti–factor Xa activity in large cohorts of patients without bleeding.
 

A single-cohort study

Truman John Milling Jr., MD, an emergency medicine physician at Dell Seton Medical Center at the University of Texas in Austin, and his colleagues conducted the Andexanet Alfa, a Novel Antidote to the Anticoagulation Effects of Factor Xa Inhibitors (ANNEXA-4) study to evaluate the drug’s safety and efficacy in patients with acute major bleeding associated with treatment with a factor Xa inhibitor. For participants to be eligible, their bleeding had to be life threatening with signs of hemodynamic compromise, be associated with a decrease in hemoglobin level of at least 2 g/dL, or occur in a critical organ such as the brain. An independent academic committee determined whether patients met these criteria.

The trial’s primary efficacy outcomes were change from baseline in anti–factor Xa activity and the percentage of patients with excellent or good hemostatic efficacy at 12 hours. The primary safety endpoints were death, thrombotic events, and the development of neutralizing antibodies to andexanet or to native factor X and factor Xa. The efficacy population included patients with major bleeding and baseline anti–factor Xa activity of at least 75 ng/mL. The safety population included all patients who received a dose of andexanet. The independent committee adjudicated the efficacy and safety outcomes.
 

Hemostasis was sustained for 12 hours

The investigators enrolled 352 participants into the study, all of whom received andexanet and were followed for at least 30 days or until death. The population’s mean age was 77 years. “These were older and sicker patients with a significant amount of comorbid disease,” said Dr. Milling. The primary indication for anticoagulation was atrial fibrillation in 80% of patients. The primary site of bleeding was intracranial in 64% of patients and gastrointestinal in 26% of patients. The remaining 10% of patients had bleeding affecting other areas (such as pericardial or intramuscular bleeding).

The investigators included 254 patients in the efficacy population. At the end of the administration of the andexanet bolus, the median value for anti–factor Xa activity decreased by 92% among participants receiving apixaban, 92% among participants receiving rivaroxaban, and 75% among patients receiving enoxaparin. Among patients receiving apixaban, the median value for anti–factor Xa activity was decreased by 32% at 4 hours, 34% at 8 hours, and 38% at 12 hours. Among patients receiving rivaroxaban, the median value for anti–factor Xa activity was decreased by 42% at 4 hours, 48% at 8 hours, and 62% at 12 hours.

Dr. Milling and his colleagues assessed hemostatic efficacy in 249 patients. Of this group, 82% achieved good or excellent hemostasis. Among participants with good or excellent hemostasis, 84% had excellent results, and 16% had good results. Subanalysis by factor Xa inhibitor, type of bleed, age, and dose of andexanet did not alter the findings significantly.

To determine whether hemostasis had been sustained sufficiently to prevent clinical deterioration, the investigators examined 71 patients with ICH and a single-compartment bleed. From 1 hour to 12 hours, one patient’s outcome changed from excellent/good to poor/none, and one patient’s outcome changed from excellent to good. For the majority of these patients, however, good hemostasis was sustained from 1 to 12 hours.

The rate of thromboembolic events was 9.7%, which is in the expected range for this population, said Dr. Milling. These events were distributed evenly among the 4 weeks of the study. Stroke and deep vein thrombosis accounted for most of these events, and pulmonary emboli and heart attacks occurred as well. “Once we restarted oral anticoagulation ... there were no more thrombotic events,” said Dr. Milling. No patient developed neutralizing antibodies to factor X or factor Xa, nor did any patient develop neutralizing antibodies to andexanet.

The overall mortality rate was 13.9%. The rate of mortality resulting from ICH was 15%, and the rate of mortality resulting from gastrointestinal bleeding was 11%. These results are impressive, considering that patients had received anticoagulants, said Dr. Milling.

Portola Pharmaceuticals, the maker of andexanet alfa, funded the study. Dr. Milling reported receiving funding and honoraria from the Population Health Research Institute at McMasters University, Janssen, CSL Behring, and Octapharma. He also received a small research payment from Portola Pharmaceuticals. Several of the investigators reported receiving funding from Portola Pharmaceuticals.

[email protected]

SOURCE: Milling TJ et al. ISC 2019, Abstract LB7.

Earlier this year, the Food and Drug Administration approved Cablivi (caplacizumab-yhdp) (Sanofi Genzyme, Cambridge, Mass.) for the treatment of acquired thrombotic thrombocytopenic purpura (TTP), making it the first medication specifically indicated for the treatment of TTP.

The approval of caplacizumab and the clinical trial results that approval is based on are the most promising developments in the treatment of TTP since the introduction of plasma exchange (PE) therapy. However, many questions remain about how to best administer caplacizumab, specifically, which patients should receive it? Should all TTP patients start on caplacizumab therapy or should it be limited to patients with histories of TTP or those slow to respond to standard therapy with PE and immunosuppression?

TTP is a rare thrombotic microangiopathy characterized by thrombocytopenia and microangiopathic hemolytic anemia caused by the inhibition of ADAMTS13, a metalloproteinase, which cleaves large-molecular-weight von Willebrand factor (vWF) multimers. Caplacizumab is a humanized bivalent, variable domain-only immunoglobulin fragment. The drug targets the A1 domain of vWF and inhibits the binding between vWF and the platelet glycoprotein Ib-IX-V receptor, preventing the formation of the microvascular thrombi and platelet loss associated with TTP.

FDA approval of caplacizumab came shortly after the publication of the results of the HERCULES trial in the New England Journal of Medicine by Marie Scully, MD, and her colleagues (N Engl J Med. 2019; 380[4]: 335-46).

HERCULES was an international phase 3, double blinded, placebo-controlled, randomized study designed to evaluate the efficacy and safety of caplacizumab. In total, 145 patients participated in the trial. Caplacizumab or placebo were given in addition to standard therapy of plasma exchange (PE) and immunosuppression. Caplacizumab or placebo were administered as an intravenous loading dose prior to the first PE after randomization and subcutaneously once daily until 30 days after the last PE. All patients received daily PE until 2 days after platelet count normalization.

The primary measure of the study was the time to platelet count response of greater than 150 x 10⁹/L following the cessation of daily PE. Secondary measures included TTP-related death; TTP relapse; major thromboembolic events; proportion of subjects with refractory TTP; normalization of organ damage markers including lactate dehydrogenase, cardiac troponin I, and serum creatinine; and other adverse events.

The authors found that the median time of normalization of the platelet count was shorter in the caplacizumab group, compared with placebo, with the caplacizumab group being 1.55 times more likely to have a normalized platelet count at any given time point in the study. While statistically significant differences were identified in the rate of platelet normalization, the median number of days of PE until normalization was only 2 days less in the caplacizumab group (five treatments) than in the placebo group (seven treatments), which may not be clinically significant for the treating physician.

In fact, the secondary endpoints of the study seem much more clinically promising in the treatment of TTP. The composite rate of TTP-related death, TTP recurrence, or major thromboembolic events during the treatment period was significantly lower in the caplacizumab group (12%) versus placebo (49%). No TTP-related deaths occurred in the caplacizumab group. The caplacizumab group was also statistically less likely to have a TTP exacerbation, defined as disease recurrence within 30 days from the last PE, than the placebo group.

End organ damage serum markers also improved faster in the caplacizumab group, although there was no significant difference between groups. Overall hospitalization (median of 9 vs. 12 days) and ICU stays (median of 3 vs. 5 days) were shorter in the caplacizumab group, compared with the placebo group.

While several relapses, defined as disease recurrence after 30 days from the last PE, occurred in the caplacizumab group, the relapses were only found in patients with ADAMTS13 activity of less than 10% at the end of the treatment period. Mild side effects, such as mucocutaneous bleeding were more frequent in the caplacizumab group. No major bleeding complications were observed.

The HERCULES trial generates more questions about the role of ADAMTS13 activity testing to monitor treatment response and to make therapy decisions. Extremely low ADAMTS13 activity levels at the cessation of therapy may be a sign of treatment inadequacy and may warrant closer follow-up of at-risk patients on caplacizumab.

Sanofi Genzyme estimates that the U.S. list price will be approximately $270,000 for a standard treatment course, according to a news release from the company. Whether payers will add it to formularies remains uncertain, but the high drug cost may be countered by potential savings in the reduction of hospital and ICU days with caplacizumab therapy. Sanofi Genzyme will also have a patient support program for eligible patients.

Caplacizumab has been approved in Europe since August 2018, but is not readily available in the United States. Given the dearth of clinical experience with the drug outside of the TITAN and HERCULES trials, strong recommendations for when and how to initiate therapy remain elusive.

As caplacizumab is further introduced into clinical practice, more studies are needed to identify which patient groups will benefit most from therapy. The current data for caplacizumab shows that it will be used as an adjunct to standard PE therapy, rather than as a replacement. How the drug is used in combination with current TTP treatments – such as corticosteroids, rituximab, bortezomib, vincristine, N-acetylcysteine, and splenectomy – should be evaluated to identify which treatment combinations not only improve platelet counts, but also reduce mortality and morbidity while remaining cost effective.

Dr. Ricci is a staff physician and Apheresis Director at the Taussig Cancer Institute at the Cleveland Clinic. She reported having no conflicts of interest.

Earlier this year, the Food and Drug Administration approved Cablivi (caplacizumab-yhdp) (Sanofi Genzyme, Cambridge, Mass.) for the treatment of acquired thrombotic thrombocytopenic purpura (TTP), making it the first medication specifically indicated for the treatment of TTP.

The approval of caplacizumab and the clinical trial results that approval is based on are the most promising developments in the treatment of TTP since the introduction of plasma exchange (PE) therapy. However, many questions remain about how to best administer caplacizumab, specifically, which patients should receive it? Should all TTP patients start on caplacizumab therapy or should it be limited to patients with histories of TTP or those slow to respond to standard therapy with PE and immunosuppression?

TTP is a rare thrombotic microangiopathy characterized by thrombocytopenia and microangiopathic hemolytic anemia caused by the inhibition of ADAMTS13, a metalloproteinase, which cleaves large-molecular-weight von Willebrand factor (vWF) multimers. Caplacizumab is a humanized bivalent, variable domain-only immunoglobulin fragment. The drug targets the A1 domain of vWF and inhibits the binding between vWF and the platelet glycoprotein Ib-IX-V receptor, preventing the formation of the microvascular thrombi and platelet loss associated with TTP.

FDA approval of caplacizumab came shortly after the publication of the results of the HERCULES trial in the New England Journal of Medicine by Marie Scully, MD, and her colleagues (N Engl J Med. 2019; 380[4]: 335-46).

HERCULES was an international phase 3, double blinded, placebo-controlled, randomized study designed to evaluate the efficacy and safety of caplacizumab. In total, 145 patients participated in the trial. Caplacizumab or placebo were given in addition to standard therapy of plasma exchange (PE) and immunosuppression. Caplacizumab or placebo were administered as an intravenous loading dose prior to the first PE after randomization and subcutaneously once daily until 30 days after the last PE. All patients received daily PE until 2 days after platelet count normalization.

The primary measure of the study was the time to platelet count response of greater than 150 x 10⁹/L following the cessation of daily PE. Secondary measures included TTP-related death; TTP relapse; major thromboembolic events; proportion of subjects with refractory TTP; normalization of organ damage markers including lactate dehydrogenase, cardiac troponin I, and serum creatinine; and other adverse events.

The authors found that the median time of normalization of the platelet count was shorter in the caplacizumab group, compared with placebo, with the caplacizumab group being 1.55 times more likely to have a normalized platelet count at any given time point in the study. While statistically significant differences were identified in the rate of platelet normalization, the median number of days of PE until normalization was only 2 days less in the caplacizumab group (five treatments) than in the placebo group (seven treatments), which may not be clinically significant for the treating physician.

In fact, the secondary endpoints of the study seem much more clinically promising in the treatment of TTP. The composite rate of TTP-related death, TTP recurrence, or major thromboembolic events during the treatment period was significantly lower in the caplacizumab group (12%) versus placebo (49%). No TTP-related deaths occurred in the caplacizumab group. The caplacizumab group was also statistically less likely to have a TTP exacerbation, defined as disease recurrence within 30 days from the last PE, than the placebo group.

End organ damage serum markers also improved faster in the caplacizumab group, although there was no significant difference between groups. Overall hospitalization (median of 9 vs. 12 days) and ICU stays (median of 3 vs. 5 days) were shorter in the caplacizumab group, compared with the placebo group.

While several relapses, defined as disease recurrence after 30 days from the last PE, occurred in the caplacizumab group, the relapses were only found in patients with ADAMTS13 activity of less than 10% at the end of the treatment period. Mild side effects, such as mucocutaneous bleeding were more frequent in the caplacizumab group. No major bleeding complications were observed.

The HERCULES trial generates more questions about the role of ADAMTS13 activity testing to monitor treatment response and to make therapy decisions. Extremely low ADAMTS13 activity levels at the cessation of therapy may be a sign of treatment inadequacy and may warrant closer follow-up of at-risk patients on caplacizumab.

Sanofi Genzyme estimates that the U.S. list price will be approximately $270,000 for a standard treatment course, according to a news release from the company. Whether payers will add it to formularies remains uncertain, but the high drug cost may be countered by potential savings in the reduction of hospital and ICU days with caplacizumab therapy. Sanofi Genzyme will also have a patient support program for eligible patients.

Caplacizumab has been approved in Europe since August 2018, but is not readily available in the United States. Given the dearth of clinical experience with the drug outside of the TITAN and HERCULES trials, strong recommendations for when and how to initiate therapy remain elusive.

As caplacizumab is further introduced into clinical practice, more studies are needed to identify which patient groups will benefit most from therapy. The current data for caplacizumab shows that it will be used as an adjunct to standard PE therapy, rather than as a replacement. How the drug is used in combination with current TTP treatments – such as corticosteroids, rituximab, bortezomib, vincristine, N-acetylcysteine, and splenectomy – should be evaluated to identify which treatment combinations not only improve platelet counts, but also reduce mortality and morbidity while remaining cost effective.

Dr. Ricci is a staff physician and Apheresis Director at the Taussig Cancer Institute at the Cleveland Clinic. She reported having no conflicts of interest.

Earlier this year, the Food and Drug Administration approved Cablivi (caplacizumab-yhdp) (Sanofi Genzyme, Cambridge, Mass.) for the treatment of acquired thrombotic thrombocytopenic purpura (TTP), making it the first medication specifically indicated for the treatment of TTP.

The approval of caplacizumab and the clinical trial results that approval is based on are the most promising developments in the treatment of TTP since the introduction of plasma exchange (PE) therapy. However, many questions remain about how to best administer caplacizumab, specifically, which patients should receive it? Should all TTP patients start on caplacizumab therapy or should it be limited to patients with histories of TTP or those slow to respond to standard therapy with PE and immunosuppression?

TTP is a rare thrombotic microangiopathy characterized by thrombocytopenia and microangiopathic hemolytic anemia caused by the inhibition of ADAMTS13, a metalloproteinase, which cleaves large-molecular-weight von Willebrand factor (vWF) multimers. Caplacizumab is a humanized bivalent, variable domain-only immunoglobulin fragment. The drug targets the A1 domain of vWF and inhibits the binding between vWF and the platelet glycoprotein Ib-IX-V receptor, preventing the formation of the microvascular thrombi and platelet loss associated with TTP.

FDA approval of caplacizumab came shortly after the publication of the results of the HERCULES trial in the New England Journal of Medicine by Marie Scully, MD, and her colleagues (N Engl J Med. 2019; 380[4]: 335-46).

HERCULES was an international phase 3, double blinded, placebo-controlled, randomized study designed to evaluate the efficacy and safety of caplacizumab. In total, 145 patients participated in the trial. Caplacizumab or placebo were given in addition to standard therapy of plasma exchange (PE) and immunosuppression. Caplacizumab or placebo were administered as an intravenous loading dose prior to the first PE after randomization and subcutaneously once daily until 30 days after the last PE. All patients received daily PE until 2 days after platelet count normalization.

The primary measure of the study was the time to platelet count response of greater than 150 x 10⁹/L following the cessation of daily PE. Secondary measures included TTP-related death; TTP relapse; major thromboembolic events; proportion of subjects with refractory TTP; normalization of organ damage markers including lactate dehydrogenase, cardiac troponin I, and serum creatinine; and other adverse events.

The authors found that the median time of normalization of the platelet count was shorter in the caplacizumab group, compared with placebo, with the caplacizumab group being 1.55 times more likely to have a normalized platelet count at any given time point in the study. While statistically significant differences were identified in the rate of platelet normalization, the median number of days of PE until normalization was only 2 days less in the caplacizumab group (five treatments) than in the placebo group (seven treatments), which may not be clinically significant for the treating physician.

In fact, the secondary endpoints of the study seem much more clinically promising in the treatment of TTP. The composite rate of TTP-related death, TTP recurrence, or major thromboembolic events during the treatment period was significantly lower in the caplacizumab group (12%) versus placebo (49%). No TTP-related deaths occurred in the caplacizumab group. The caplacizumab group was also statistically less likely to have a TTP exacerbation, defined as disease recurrence within 30 days from the last PE, than the placebo group.

End organ damage serum markers also improved faster in the caplacizumab group, although there was no significant difference between groups. Overall hospitalization (median of 9 vs. 12 days) and ICU stays (median of 3 vs. 5 days) were shorter in the caplacizumab group, compared with the placebo group.

While several relapses, defined as disease recurrence after 30 days from the last PE, occurred in the caplacizumab group, the relapses were only found in patients with ADAMTS13 activity of less than 10% at the end of the treatment period. Mild side effects, such as mucocutaneous bleeding were more frequent in the caplacizumab group. No major bleeding complications were observed.

The HERCULES trial generates more questions about the role of ADAMTS13 activity testing to monitor treatment response and to make therapy decisions. Extremely low ADAMTS13 activity levels at the cessation of therapy may be a sign of treatment inadequacy and may warrant closer follow-up of at-risk patients on caplacizumab.

Sanofi Genzyme estimates that the U.S. list price will be approximately $270,000 for a standard treatment course, according to a news release from the company. Whether payers will add it to formularies remains uncertain, but the high drug cost may be countered by potential savings in the reduction of hospital and ICU days with caplacizumab therapy. Sanofi Genzyme will also have a patient support program for eligible patients.

Caplacizumab has been approved in Europe since August 2018, but is not readily available in the United States. Given the dearth of clinical experience with the drug outside of the TITAN and HERCULES trials, strong recommendations for when and how to initiate therapy remain elusive.

As caplacizumab is further introduced into clinical practice, more studies are needed to identify which patient groups will benefit most from therapy. The current data for caplacizumab shows that it will be used as an adjunct to standard PE therapy, rather than as a replacement. How the drug is used in combination with current TTP treatments – such as corticosteroids, rituximab, bortezomib, vincristine, N-acetylcysteine, and splenectomy – should be evaluated to identify which treatment combinations not only improve platelet counts, but also reduce mortality and morbidity while remaining cost effective.

Dr. Ricci is a staff physician and Apheresis Director at the Taussig Cancer Institute at the Cleveland Clinic. She reported having no conflicts of interest.

SEATTLE – HIV infection is associated with increased risk of recurrent venous thromboembolism, especially within 1 year of the initial episode. The finding, presented during a poster session at the Conference on Retroviruses & Opportunistic Infections, follows up on an earlier study that found that first-time VTE risk also is higher among HIV-positive individuals than in the general population.

Jim Kling/MDedge News

The conclusion about first-time VTE risk, published earlier this year in Lancet HIV, came from a comparison between the ATHENA (AIDS Therapy Evaluation in the Netherlands) cohort and European population-level of studies of VTE. It found a crude incidence of 2.33 VTE events per 1,000 person-years In HIV patients, with heightened odds when CD4 cell counts were below 200 cells/mcL (adjusted hazard ratio, 3.40).

The new work represents a follow-up and compared results from ATHENA (153 patients with HIV and first VTE) and the Dutch MEGA cohort (4,005 patients without HIV, with first VTE), which includes the general population. Overall, 26% of patients in the ATHENA cohort experienced a second VTE event, compared with 16% of the general population. At 1 year after anticoagulation withdrawal, HIV-positive individuals were at 67% increased risk (HR, 1.67). At 6-years after withdrawal, the relationship was not statistically significant (HR, 1.22).

Researchers also found that CD4 cell-count recovery was associated with lowered risk, with every 100 cell-count increase between initial VTE diagnosis and anticoagulant withdrawal linked to a 20% reduction in risk (HR, 0.80).

“The clinical question is: If it’s true you have an increased risk of recurrence, should you be continuing anticoagulant therapy longer in people with HIV? This poster doesn’t answer that question and you probably need a randomized, controlled trial to look at that,” Peter Reiss, MD, professor of medicine at Amsterdam University Medical Center, said in an interview during the conference.

In the absence of a clear answer, it’s sensible for clinicians to be aware of the potential increased risk, much as clinicians have internalized the increased risk of atherosclerotic vascular disease in HIV patients. “I think the publication [in Lancet HIV] as well as this poster suggest that on the venous side of things there may also be an accentuated risk,” said Dr. Reiss.

Heidi Crane, MD, a professor of medicine at the University of Washington, Seattle, presented a poster examining the underlying factors that may predispose HIV patients to first-time VTE events. Her team performed an adjudicated review of VTE cases among HIV patients at six institutions and found that the risk factors appeared to be distinct from those seen in the general population.

The traditional long plane ride was less common in this population, while factors such as injected drug use and pneumonia were more common. The VTE events occurred at a median age of 49 years; 30% of the patients had a detectable viral load. “We’re seeing a little more (VTE) than you might expect, and in a younger population than you might have guessed,” said Dr. Crane in an interview.

The most frequent predisposing risk factors were recent hospitalization (40%), infection (40%), or immobilization/bed rest (24%) within the past 90 days, and injectable drug use (22%). “It’s not just the traditional risk factors. Some HIV-specific risk factors are driving this,” said Dr. Crane.

She also aims to learn more about the specifics of risk factors, such as catheter-associated thromboses. The team is working to increase the sample size in order to parse out the relationships with specific outcomes.

In the meantime, the data further characterize the health challenges facing people living with HIV. “This is another example demonstrating that comorbid conditions among patients with HIV that are often considered age related occur at much younger ages in our population,” said Dr. Crane.

SOURCE: Rokx C et al. CROI 2019, Abstract 636; and Tenforde MW et al. CROI 2019, Abstract 637.

.

SEATTLE – HIV infection is associated with increased risk of recurrent venous thromboembolism, especially within 1 year of the initial episode. The finding, presented during a poster session at the Conference on Retroviruses & Opportunistic Infections, follows up on an earlier study that found that first-time VTE risk also is higher among HIV-positive individuals than in the general population.

Jim Kling/MDedge News

The conclusion about first-time VTE risk, published earlier this year in Lancet HIV, came from a comparison between the ATHENA (AIDS Therapy Evaluation in the Netherlands) cohort and European population-level of studies of VTE. It found a crude incidence of 2.33 VTE events per 1,000 person-years In HIV patients, with heightened odds when CD4 cell counts were below 200 cells/mcL (adjusted hazard ratio, 3.40).

The new work represents a follow-up and compared results from ATHENA (153 patients with HIV and first VTE) and the Dutch MEGA cohort (4,005 patients without HIV, with first VTE), which includes the general population. Overall, 26% of patients in the ATHENA cohort experienced a second VTE event, compared with 16% of the general population. At 1 year after anticoagulation withdrawal, HIV-positive individuals were at 67% increased risk (HR, 1.67). At 6-years after withdrawal, the relationship was not statistically significant (HR, 1.22).

Researchers also found that CD4 cell-count recovery was associated with lowered risk, with every 100 cell-count increase between initial VTE diagnosis and anticoagulant withdrawal linked to a 20% reduction in risk (HR, 0.80).

“The clinical question is: If it’s true you have an increased risk of recurrence, should you be continuing anticoagulant therapy longer in people with HIV? This poster doesn’t answer that question and you probably need a randomized, controlled trial to look at that,” Peter Reiss, MD, professor of medicine at Amsterdam University Medical Center, said in an interview during the conference.

In the absence of a clear answer, it’s sensible for clinicians to be aware of the potential increased risk, much as clinicians have internalized the increased risk of atherosclerotic vascular disease in HIV patients. “I think the publication [in Lancet HIV] as well as this poster suggest that on the venous side of things there may also be an accentuated risk,” said Dr. Reiss.

Heidi Crane, MD, a professor of medicine at the University of Washington, Seattle, presented a poster examining the underlying factors that may predispose HIV patients to first-time VTE events. Her team performed an adjudicated review of VTE cases among HIV patients at six institutions and found that the risk factors appeared to be distinct from those seen in the general population.

The traditional long plane ride was less common in this population, while factors such as injected drug use and pneumonia were more common. The VTE events occurred at a median age of 49 years; 30% of the patients had a detectable viral load. “We’re seeing a little more (VTE) than you might expect, and in a younger population than you might have guessed,” said Dr. Crane in an interview.

The most frequent predisposing risk factors were recent hospitalization (40%), infection (40%), or immobilization/bed rest (24%) within the past 90 days, and injectable drug use (22%). “It’s not just the traditional risk factors. Some HIV-specific risk factors are driving this,” said Dr. Crane.

She also aims to learn more about the specifics of risk factors, such as catheter-associated thromboses. The team is working to increase the sample size in order to parse out the relationships with specific outcomes.

In the meantime, the data further characterize the health challenges facing people living with HIV. “This is another example demonstrating that comorbid conditions among patients with HIV that are often considered age related occur at much younger ages in our population,” said Dr. Crane.

SOURCE: Rokx C et al. CROI 2019, Abstract 636; and Tenforde MW et al. CROI 2019, Abstract 637.

.

SEATTLE – HIV infection is associated with increased risk of recurrent venous thromboembolism, especially within 1 year of the initial episode. The finding, presented during a poster session at the Conference on Retroviruses & Opportunistic Infections, follows up on an earlier study that found that first-time VTE risk also is higher among HIV-positive individuals than in the general population.

Jim Kling/MDedge News

The conclusion about first-time VTE risk, published earlier this year in Lancet HIV, came from a comparison between the ATHENA (AIDS Therapy Evaluation in the Netherlands) cohort and European population-level of studies of VTE. It found a crude incidence of 2.33 VTE events per 1,000 person-years In HIV patients, with heightened odds when CD4 cell counts were below 200 cells/mcL (adjusted hazard ratio, 3.40).

The new work represents a follow-up and compared results from ATHENA (153 patients with HIV and first VTE) and the Dutch MEGA cohort (4,005 patients without HIV, with first VTE), which includes the general population. Overall, 26% of patients in the ATHENA cohort experienced a second VTE event, compared with 16% of the general population. At 1 year after anticoagulation withdrawal, HIV-positive individuals were at 67% increased risk (HR, 1.67). At 6-years after withdrawal, the relationship was not statistically significant (HR, 1.22).

Researchers also found that CD4 cell-count recovery was associated with lowered risk, with every 100 cell-count increase between initial VTE diagnosis and anticoagulant withdrawal linked to a 20% reduction in risk (HR, 0.80).

“The clinical question is: If it’s true you have an increased risk of recurrence, should you be continuing anticoagulant therapy longer in people with HIV? This poster doesn’t answer that question and you probably need a randomized, controlled trial to look at that,” Peter Reiss, MD, professor of medicine at Amsterdam University Medical Center, said in an interview during the conference.

In the absence of a clear answer, it’s sensible for clinicians to be aware of the potential increased risk, much as clinicians have internalized the increased risk of atherosclerotic vascular disease in HIV patients. “I think the publication [in Lancet HIV] as well as this poster suggest that on the venous side of things there may also be an accentuated risk,” said Dr. Reiss.

Heidi Crane, MD, a professor of medicine at the University of Washington, Seattle, presented a poster examining the underlying factors that may predispose HIV patients to first-time VTE events. Her team performed an adjudicated review of VTE cases among HIV patients at six institutions and found that the risk factors appeared to be distinct from those seen in the general population.

The traditional long plane ride was less common in this population, while factors such as injected drug use and pneumonia were more common. The VTE events occurred at a median age of 49 years; 30% of the patients had a detectable viral load. “We’re seeing a little more (VTE) than you might expect, and in a younger population than you might have guessed,” said Dr. Crane in an interview.

The most frequent predisposing risk factors were recent hospitalization (40%), infection (40%), or immobilization/bed rest (24%) within the past 90 days, and injectable drug use (22%). “It’s not just the traditional risk factors. Some HIV-specific risk factors are driving this,” said Dr. Crane.

She also aims to learn more about the specifics of risk factors, such as catheter-associated thromboses. The team is working to increase the sample size in order to parse out the relationships with specific outcomes.

In the meantime, the data further characterize the health challenges facing people living with HIV. “This is another example demonstrating that comorbid conditions among patients with HIV that are often considered age related occur at much younger ages in our population,” said Dr. Crane.

SOURCE: Rokx C et al. CROI 2019, Abstract 636; and Tenforde MW et al. CROI 2019, Abstract 637.

.

SNOWMASS, COLO. – Interventions that are simple and straightforward for other patients – such as therapeutic phlebotomy, bronchoscopy, anticoagulation, administration of IV antibiotics – can quickly have catastrophic results in patients with Eisenmenger syndrome, Carole A. Warnes, MD, cautioned at the Annual Cardiovascular Conference at Snowmass sponsored by the American College of Cardiology.

Bruce Jancin/MDedge News

This is why the 2018 ACC/American Heart Association guidelines on the management of patients with adult congenital heart disease recommend as a Class I indication that most patients with ACHD, including all those with Eisenmenger syndrome, be managed in collaboration with a cardiologist at a specialized ACHD center (Circulation. 2018 Aug 16. doi: 10.1161/CIR.0000000000000603), noted Dr. Warnes, professor of medicine at the Mayo Clinic in Rochester, Minn., and director of the Snowmass conference.

“There are lots of mistakes in diagnosis and management because so many physicians are unfamiliar with the kinds of problems these patients face,” the cardiologist said.

She cited as a real-world example a patient with Eisenmenger syndrome admitted for pneumonia. Twenty minutes after being placed on intravenous antibiotics she had a stroke. Why?

“She didn’t have an air filter on her IV line. Any air going into a cyanotic’s blood stream will go to the head and give them a stroke. Something that is simple – routine for other patients – may kill a patient with cyanotic heart disease,” Dr. Warnes said.

Another illustrative case: a patient with Eisenmenger syndrome presents with hemoptysis, an infiltrate in her right lung, a hemoglobin of 19.8 g/dL, and anemia. Should she undergo therapeutic phlebotomy? How about urgent bronchoscopy?

No and no, Dr. Warnes emphasized.

“You do not phlebotomize cyanotic patients unless they have symptoms of hyperviscosity, meaning terrible headache or poor concentration, along with a hemoglobin greater than 20 g/dL. They need that high hemoglobin. They may be blue, and you need those red cells to carry the oxygen around. Otherwise you may make them worse. And if you give them iron for their anemia, you will increase their risk of stroke,” she explained.

Hemoptysis in patients with Eisenmenger syndrome is a life-threatening warning sign. By the time Eisenmenger syndrome patients reach age 40 years, nearly all of them have experienced episodes of hemoptysis. And more and more patients with the syndrome are moving well beyond that milestone and surviving into their 60s and beyond.

“Many Eisenmenger syndrome patients are not dying when they’re 20 or 30. We can get them to a good old age,” according to Dr. Warnes, who founded the ACHD center at the Mayo Clinic.

Most of the time the cause of hemoptysis in patients with Eisenmenger syndrome is an intrapulmonary hemorrhage. Anticoagulation can turn that hemorrhage catastrophic. So can bronchoscopy. Indeed, the cause of death in roughly 30% of patients with this form of congenital heart disease is catastrophic hemoptysis.

“You bar the door from your friendly pulmonologist who wants to bronchoscope these patients. Bronchoscopy never does any good unless the patient is so hypoxic that you need to suck the blood out of their lungs,” Dr. Warnes emphasized.

Anticoagulation is ordinarily to be avoided in patients with Eisenmenger syndrome because of their bleeding risk, even when pulmonary thrombosis is suspected, she added.

So, to summarize: These patients basically need stabilizing, with no anticoagulation, no bronchoscopy, and no phlebotomy, she said.

Another danger zone for patients with Eisenmenger syndrome is pregnancy. The condition is associated with a 30% maternal mortality rate.

Dr. Warnes noted that, even at the Mayo Clinic, which has had a pioneering ACHD center for decades, awareness of key elements of management of affected patients is low among nonspecialists.

“As I’ve done my hospital services in the last couple of months, I sort of felt I was on patrol, snatching these patients from problems,” she recalled.

Dr. Warnes reported having no financial conflicts regarding her presentation.
 

[email protected]

SNOWMASS, COLO. – Interventions that are simple and straightforward for other patients – such as therapeutic phlebotomy, bronchoscopy, anticoagulation, administration of IV antibiotics – can quickly have catastrophic results in patients with Eisenmenger syndrome, Carole A. Warnes, MD, cautioned at the Annual Cardiovascular Conference at Snowmass sponsored by the American College of Cardiology.

Bruce Jancin/MDedge News

This is why the 2018 ACC/American Heart Association guidelines on the management of patients with adult congenital heart disease recommend as a Class I indication that most patients with ACHD, including all those with Eisenmenger syndrome, be managed in collaboration with a cardiologist at a specialized ACHD center (Circulation. 2018 Aug 16. doi: 10.1161/CIR.0000000000000603), noted Dr. Warnes, professor of medicine at the Mayo Clinic in Rochester, Minn., and director of the Snowmass conference.

“There are lots of mistakes in diagnosis and management because so many physicians are unfamiliar with the kinds of problems these patients face,” the cardiologist said.

She cited as a real-world example a patient with Eisenmenger syndrome admitted for pneumonia. Twenty minutes after being placed on intravenous antibiotics she had a stroke. Why?

“She didn’t have an air filter on her IV line. Any air going into a cyanotic’s blood stream will go to the head and give them a stroke. Something that is simple – routine for other patients – may kill a patient with cyanotic heart disease,” Dr. Warnes said.

Another illustrative case: a patient with Eisenmenger syndrome presents with hemoptysis, an infiltrate in her right lung, a hemoglobin of 19.8 g/dL, and anemia. Should she undergo therapeutic phlebotomy? How about urgent bronchoscopy?

No and no, Dr. Warnes emphasized.

“You do not phlebotomize cyanotic patients unless they have symptoms of hyperviscosity, meaning terrible headache or poor concentration, along with a hemoglobin greater than 20 g/dL. They need that high hemoglobin. They may be blue, and you need those red cells to carry the oxygen around. Otherwise you may make them worse. And if you give them iron for their anemia, you will increase their risk of stroke,” she explained.

Hemoptysis in patients with Eisenmenger syndrome is a life-threatening warning sign. By the time Eisenmenger syndrome patients reach age 40 years, nearly all of them have experienced episodes of hemoptysis. And more and more patients with the syndrome are moving well beyond that milestone and surviving into their 60s and beyond.

“Many Eisenmenger syndrome patients are not dying when they’re 20 or 30. We can get them to a good old age,” according to Dr. Warnes, who founded the ACHD center at the Mayo Clinic.

Most of the time the cause of hemoptysis in patients with Eisenmenger syndrome is an intrapulmonary hemorrhage. Anticoagulation can turn that hemorrhage catastrophic. So can bronchoscopy. Indeed, the cause of death in roughly 30% of patients with this form of congenital heart disease is catastrophic hemoptysis.

“You bar the door from your friendly pulmonologist who wants to bronchoscope these patients. Bronchoscopy never does any good unless the patient is so hypoxic that you need to suck the blood out of their lungs,” Dr. Warnes emphasized.

Anticoagulation is ordinarily to be avoided in patients with Eisenmenger syndrome because of their bleeding risk, even when pulmonary thrombosis is suspected, she added.

So, to summarize: These patients basically need stabilizing, with no anticoagulation, no bronchoscopy, and no phlebotomy, she said.

Another danger zone for patients with Eisenmenger syndrome is pregnancy. The condition is associated with a 30% maternal mortality rate.

Dr. Warnes noted that, even at the Mayo Clinic, which has had a pioneering ACHD center for decades, awareness of key elements of management of affected patients is low among nonspecialists.

“As I’ve done my hospital services in the last couple of months, I sort of felt I was on patrol, snatching these patients from problems,” she recalled.

Dr. Warnes reported having no financial conflicts regarding her presentation.
 

[email protected]

SNOWMASS, COLO. – Interventions that are simple and straightforward for other patients – such as therapeutic phlebotomy, bronchoscopy, anticoagulation, administration of IV antibiotics – can quickly have catastrophic results in patients with Eisenmenger syndrome, Carole A. Warnes, MD, cautioned at the Annual Cardiovascular Conference at Snowmass sponsored by the American College of Cardiology.

Bruce Jancin/MDedge News

This is why the 2018 ACC/American Heart Association guidelines on the management of patients with adult congenital heart disease recommend as a Class I indication that most patients with ACHD, including all those with Eisenmenger syndrome, be managed in collaboration with a cardiologist at a specialized ACHD center (Circulation. 2018 Aug 16. doi: 10.1161/CIR.0000000000000603), noted Dr. Warnes, professor of medicine at the Mayo Clinic in Rochester, Minn., and director of the Snowmass conference.

“There are lots of mistakes in diagnosis and management because so many physicians are unfamiliar with the kinds of problems these patients face,” the cardiologist said.

She cited as a real-world example a patient with Eisenmenger syndrome admitted for pneumonia. Twenty minutes after being placed on intravenous antibiotics she had a stroke. Why?

“She didn’t have an air filter on her IV line. Any air going into a cyanotic’s blood stream will go to the head and give them a stroke. Something that is simple – routine for other patients – may kill a patient with cyanotic heart disease,” Dr. Warnes said.

Another illustrative case: a patient with Eisenmenger syndrome presents with hemoptysis, an infiltrate in her right lung, a hemoglobin of 19.8 g/dL, and anemia. Should she undergo therapeutic phlebotomy? How about urgent bronchoscopy?

No and no, Dr. Warnes emphasized.

“You do not phlebotomize cyanotic patients unless they have symptoms of hyperviscosity, meaning terrible headache or poor concentration, along with a hemoglobin greater than 20 g/dL. They need that high hemoglobin. They may be blue, and you need those red cells to carry the oxygen around. Otherwise you may make them worse. And if you give them iron for their anemia, you will increase their risk of stroke,” she explained.

Hemoptysis in patients with Eisenmenger syndrome is a life-threatening warning sign. By the time Eisenmenger syndrome patients reach age 40 years, nearly all of them have experienced episodes of hemoptysis. And more and more patients with the syndrome are moving well beyond that milestone and surviving into their 60s and beyond.

“Many Eisenmenger syndrome patients are not dying when they’re 20 or 30. We can get them to a good old age,” according to Dr. Warnes, who founded the ACHD center at the Mayo Clinic.

Most of the time the cause of hemoptysis in patients with Eisenmenger syndrome is an intrapulmonary hemorrhage. Anticoagulation can turn that hemorrhage catastrophic. So can bronchoscopy. Indeed, the cause of death in roughly 30% of patients with this form of congenital heart disease is catastrophic hemoptysis.

“You bar the door from your friendly pulmonologist who wants to bronchoscope these patients. Bronchoscopy never does any good unless the patient is so hypoxic that you need to suck the blood out of their lungs,” Dr. Warnes emphasized.

Anticoagulation is ordinarily to be avoided in patients with Eisenmenger syndrome because of their bleeding risk, even when pulmonary thrombosis is suspected, she added.

So, to summarize: These patients basically need stabilizing, with no anticoagulation, no bronchoscopy, and no phlebotomy, she said.

Another danger zone for patients with Eisenmenger syndrome is pregnancy. The condition is associated with a 30% maternal mortality rate.

Dr. Warnes noted that, even at the Mayo Clinic, which has had a pioneering ACHD center for decades, awareness of key elements of management of affected patients is low among nonspecialists.

“As I’ve done my hospital services in the last couple of months, I sort of felt I was on patrol, snatching these patients from problems,” she recalled.

Dr. Warnes reported having no financial conflicts regarding her presentation.
 

[email protected]

A gene involved in coagulation may play a key role in inflammatory bowel disease (IBD) and offer a potential new treatment target, new research suggests.

Writing in Science Translational Medicine, researchers presented the findings of a transcriptome analysis of 1,800 intestinal biopsies from individuals with IBD across 14 different cohorts.

Their analysis revealed that the coagulation gene pathway is altered in a number of patients with active IBD and, in particular, among patients whose disease does not respond to anti–tumor necrosis factor (anti-TNF) therapy.

“Clinical studies have established that patients with IBD are at substantially increased risk for thrombotic events and those with active disease have abnormal blood coagulation parameters, but the function and mechanism remain unclear,” wrote Gerard E. Kaiko, PhD, from the University of Newcastle, Australia, in Callaghan and coauthors.

The analysis highlighted a particular component of the coagulation pathway – SERPINE1, which codes for the protein plasminogen activator inhibitor–1 (PAI-1) – whose expression was increased in colon biopsies taken from actively inflamed areas of disease, compared with biopsies of uninflamed areas, biopsies from patients in remission, or in biopsies from individuals without IBD.

The increased expression of SERPINE1/PAI-1 was mostly within epithelial cells, which the authors said supported the hypothesis that the gene is a key player in the inflammation/epithelium interface in the disease.

Researchers also found that SERPINE1 expression correlated with disease severity, and it was consistently higher in patients who had failed to respond to anti-TNF therapy. They suggested that SERPINE1/PAI-1 activity could potentially address an unmet clinical need for objective measures of disease activity and function as a way to predict response to biologic therapy.

“Although biologic therapies with anti-TNF are now a mainstay for IBD therapy, up to 40% of patients are nonresponsive, and patients lose responsiveness over time,” they wrote. “Furthermore, because more therapeutic options become available in IBD, a predictive biomarker is needed for personalized treatment.”

The authors further explored the role of SERPINE1/PAI-1 in an experimental mouse model of IBD. They found that colonic expression of the gene was around sixfold higher in mice with chemically induced colonic injury and inflammation, compared with untreated controls.

Researchers noted that PAI-1’s function is to bind and inhibit the activity of tissue plasminogen activator, which is a protein involved in the breakdown of blood clots and is coded by the gene PLAT.

They screened for which cytokine pathways might regulate PAI-1, PLAT, and tissue plasminogen activator, and they found that, while none increased SERPINE1 expression, interleukin-17A did appear to increase the expression of PLAT, which raises the possibility that IL-17A could counteract the effects of PAI-1.

The study also found that, in the colon biopsies from individuals with active disease, there was an imbalance in the ratio of PAI-1 to tissue plasminogen activator such that these biopsies showed lower levels of active tissue plasminogen activator.

“Therefore, the potentially protective mechanism of elevation of tPA [tissue plasminogen activator] does not occur properly in patients with IBD,” they wrote.

The next step was to see whether inhibiting the activity of SERPINE1 had any effect. In a mouse model of chemically induced colitis, the authors saw that treatment with a SERPINE1 inhibitor was associated with reduced weight change, mucosal damage, and reduced signs of inflammation, compared with untreated mice.

The study was supported by the Crohn’s & Colitis Foundation. Three authors were supported by grants from the National Health & Medical Research Council, one by the Cancer Institute NSW, one by an Alpha Omega Alpha – Carolyn L. Kuckein Student Research Fellowship, and two by the National Institutes of Health. Four authors have a patent pending related to PAI-1. Two authors declared advisory board positions with pharmaceutical companies, including the manufacturer of a product used in the study. Three authors are employees of Janssen R&D.

SOURCE: Kaiko GE et al. Sci. Transl. Med. 2019. doi: 10.1126/scitranslmed.aat0852.

A gene involved in coagulation may play a key role in inflammatory bowel disease (IBD) and offer a potential new treatment target, new research suggests.

Writing in Science Translational Medicine, researchers presented the findings of a transcriptome analysis of 1,800 intestinal biopsies from individuals with IBD across 14 different cohorts.

Their analysis revealed that the coagulation gene pathway is altered in a number of patients with active IBD and, in particular, among patients whose disease does not respond to anti–tumor necrosis factor (anti-TNF) therapy.

“Clinical studies have established that patients with IBD are at substantially increased risk for thrombotic events and those with active disease have abnormal blood coagulation parameters, but the function and mechanism remain unclear,” wrote Gerard E. Kaiko, PhD, from the University of Newcastle, Australia, in Callaghan and coauthors.

The analysis highlighted a particular component of the coagulation pathway – SERPINE1, which codes for the protein plasminogen activator inhibitor–1 (PAI-1) – whose expression was increased in colon biopsies taken from actively inflamed areas of disease, compared with biopsies of uninflamed areas, biopsies from patients in remission, or in biopsies from individuals without IBD.

The increased expression of SERPINE1/PAI-1 was mostly within epithelial cells, which the authors said supported the hypothesis that the gene is a key player in the inflammation/epithelium interface in the disease.

Researchers also found that SERPINE1 expression correlated with disease severity, and it was consistently higher in patients who had failed to respond to anti-TNF therapy. They suggested that SERPINE1/PAI-1 activity could potentially address an unmet clinical need for objective measures of disease activity and function as a way to predict response to biologic therapy.

“Although biologic therapies with anti-TNF are now a mainstay for IBD therapy, up to 40% of patients are nonresponsive, and patients lose responsiveness over time,” they wrote. “Furthermore, because more therapeutic options become available in IBD, a predictive biomarker is needed for personalized treatment.”

The authors further explored the role of SERPINE1/PAI-1 in an experimental mouse model of IBD. They found that colonic expression of the gene was around sixfold higher in mice with chemically induced colonic injury and inflammation, compared with untreated controls.

Researchers noted that PAI-1’s function is to bind and inhibit the activity of tissue plasminogen activator, which is a protein involved in the breakdown of blood clots and is coded by the gene PLAT.

They screened for which cytokine pathways might regulate PAI-1, PLAT, and tissue plasminogen activator, and they found that, while none increased SERPINE1 expression, interleukin-17A did appear to increase the expression of PLAT, which raises the possibility that IL-17A could counteract the effects of PAI-1.

The study also found that, in the colon biopsies from individuals with active disease, there was an imbalance in the ratio of PAI-1 to tissue plasminogen activator such that these biopsies showed lower levels of active tissue plasminogen activator.

“Therefore, the potentially protective mechanism of elevation of tPA [tissue plasminogen activator] does not occur properly in patients with IBD,” they wrote.

The next step was to see whether inhibiting the activity of SERPINE1 had any effect. In a mouse model of chemically induced colitis, the authors saw that treatment with a SERPINE1 inhibitor was associated with reduced weight change, mucosal damage, and reduced signs of inflammation, compared with untreated mice.

The study was supported by the Crohn’s & Colitis Foundation. Three authors were supported by grants from the National Health & Medical Research Council, one by the Cancer Institute NSW, one by an Alpha Omega Alpha – Carolyn L. Kuckein Student Research Fellowship, and two by the National Institutes of Health. Four authors have a patent pending related to PAI-1. Two authors declared advisory board positions with pharmaceutical companies, including the manufacturer of a product used in the study. Three authors are employees of Janssen R&D.

SOURCE: Kaiko GE et al. Sci. Transl. Med. 2019. doi: 10.1126/scitranslmed.aat0852.

A gene involved in coagulation may play a key role in inflammatory bowel disease (IBD) and offer a potential new treatment target, new research suggests.

Writing in Science Translational Medicine, researchers presented the findings of a transcriptome analysis of 1,800 intestinal biopsies from individuals with IBD across 14 different cohorts.

Their analysis revealed that the coagulation gene pathway is altered in a number of patients with active IBD and, in particular, among patients whose disease does not respond to anti–tumor necrosis factor (anti-TNF) therapy.

“Clinical studies have established that patients with IBD are at substantially increased risk for thrombotic events and those with active disease have abnormal blood coagulation parameters, but the function and mechanism remain unclear,” wrote Gerard E. Kaiko, PhD, from the University of Newcastle, Australia, in Callaghan and coauthors.

The analysis highlighted a particular component of the coagulation pathway – SERPINE1, which codes for the protein plasminogen activator inhibitor–1 (PAI-1) – whose expression was increased in colon biopsies taken from actively inflamed areas of disease, compared with biopsies of uninflamed areas, biopsies from patients in remission, or in biopsies from individuals without IBD.

The increased expression of SERPINE1/PAI-1 was mostly within epithelial cells, which the authors said supported the hypothesis that the gene is a key player in the inflammation/epithelium interface in the disease.

Researchers also found that SERPINE1 expression correlated with disease severity, and it was consistently higher in patients who had failed to respond to anti-TNF therapy. They suggested that SERPINE1/PAI-1 activity could potentially address an unmet clinical need for objective measures of disease activity and function as a way to predict response to biologic therapy.

“Although biologic therapies with anti-TNF are now a mainstay for IBD therapy, up to 40% of patients are nonresponsive, and patients lose responsiveness over time,” they wrote. “Furthermore, because more therapeutic options become available in IBD, a predictive biomarker is needed for personalized treatment.”

The authors further explored the role of SERPINE1/PAI-1 in an experimental mouse model of IBD. They found that colonic expression of the gene was around sixfold higher in mice with chemically induced colonic injury and inflammation, compared with untreated controls.

Researchers noted that PAI-1’s function is to bind and inhibit the activity of tissue plasminogen activator, which is a protein involved in the breakdown of blood clots and is coded by the gene PLAT.

They screened for which cytokine pathways might regulate PAI-1, PLAT, and tissue plasminogen activator, and they found that, while none increased SERPINE1 expression, interleukin-17A did appear to increase the expression of PLAT, which raises the possibility that IL-17A could counteract the effects of PAI-1.

The study also found that, in the colon biopsies from individuals with active disease, there was an imbalance in the ratio of PAI-1 to tissue plasminogen activator such that these biopsies showed lower levels of active tissue plasminogen activator.

“Therefore, the potentially protective mechanism of elevation of tPA [tissue plasminogen activator] does not occur properly in patients with IBD,” they wrote.

The next step was to see whether inhibiting the activity of SERPINE1 had any effect. In a mouse model of chemically induced colitis, the authors saw that treatment with a SERPINE1 inhibitor was associated with reduced weight change, mucosal damage, and reduced signs of inflammation, compared with untreated mice.

The study was supported by the Crohn’s & Colitis Foundation. Three authors were supported by grants from the National Health & Medical Research Council, one by the Cancer Institute NSW, one by an Alpha Omega Alpha – Carolyn L. Kuckein Student Research Fellowship, and two by the National Institutes of Health. Four authors have a patent pending related to PAI-1. Two authors declared advisory board positions with pharmaceutical companies, including the manufacturer of a product used in the study. Three authors are employees of Janssen R&D.

SOURCE: Kaiko GE et al. Sci. Transl. Med. 2019. doi: 10.1126/scitranslmed.aat0852.

WASHINGTON – Proteasome inhibitors are essential components of therapeutic regimens for multiple myeloma, but at least one member of this class of life-extending agents, carfilzomib (Kyprolis), is also associated with a significant increase in risk of heart failure, cautioned a specialist in plasma cell disorders.

Neil Osterweil/MDedge News

In addition, immunomodulating agents such as lenalidomide (Revlimid) and pomalidomide (Pomalyst) are associated with increased risk for thromboembolic events, said R. Frank Cornell, MD, clinical director of plasma cell disorders at Vanderbilt University Medical Center in Nashville, Tenn.

In an ongoing, prospective study comparing rates of cardiac adverse events in patients receiving carfilzomib or another proteasome inhibitor, bortezomib (Velcade), Dr. Cornell and his colleagues found that while there were no significant differences in progression-free survival (PFS) or overall survival (OS) between the treatments, “patients who experienced a cardiovascular event had significantly worse progression-free and overall survival compared to those that did not have a cardiovascular event,” he said at the American College of Cardiology’s Advancing the Cardiovascular Care of the Oncology Patient meeting.

The Prospective Observation of Cardiac Safety With Proteasome Inhibition (PROTECT) trial, scheduled for completion in August 2019, enrolled 95 patients with relapsed multiple myeloma and randomly assigned them on a 2:1 basis to receive carfilzomib or bortezomib.

The investigators found that cardiovascular adverse events occurred in 33 of the 65 patients (51%) randomized to carfilzomib, compared with 5 of 30 patients (17%) assigned to bortezomib.

The events included grade 1 or 2 heart failure (HF) in 12 patients on carfilzomib vs. 2 on bortezomib, and grade 3 or 4 HF in 11 vs. 1, respectively. Hypertension was significantly more frequent among patients on carfilzomib, and one patient on carfilzomib died from the acute coronary syndrome 24 hours after receiving carfilzomib in the second week of treatment.

The investigators found that both B-type natriuretic peptide (BNP) and N-terminal pro b-type natriuretic peptide (NT-proBNP) were highly predictive of cardiovascular adverse events. Patients on carfilzomib who had levels of the markers above normal at baseline had an odds ratio (OR) for cardiovascular events of 7.39 (P less than .0001), and those with BNP or NT-proBNP increases at week 2 or 3 during cycle 1 had an OR for a cardiovascular adverse event of 63.5 (P less than .001).

In multivariate analysis, the risk for cardiovascular events for patients treated with carfilzomib was significantly lower for patients with one or no traditional cardiovascular risk factors, compared with patients with two or more.

“Prospective monitoring with natriuretic peptides should be considered, particularly early in treatment,” Dr. Cornell said.
 

IMiDs and thromboembolism

In early clinical trials of immunomodulators (IMiDs) for multiple myeloma, investigators saw that the incidence of thromboembolic events was lower among patients who received thromboprophylaxis than among those who did not, Dr. Cornell noted.

“From this, certain guidelines have been developed such that all patients considered to be at risk should at least receive an aspirin, 81-325 mg, and patients at higher risk for thromboembolism should receive low-molecular-weight heparin or therapeutic-dose warfarin,” he said.

There is little guidance, however, about the use of direct oral anticoagulants in this population, he added, a fact that prompted him and his colleagues in oncology and cardiology to perform a pilot study of apixaban (Eliquis) for primary prevention of venous thromboembolism (VTE) in patients with multiple myeloma who were receiving immunodulatory drugs.

Results of the pilot study, reported in a poster session at the 2018 annual meeting of the American Society of Hematology, showed that among 50 patients who received apixaban 2.5 mg twice daily for 6 months during IMiD therapy, there were no VTEs, stroke, or myocardial infarction, and no episodes of major bleeding. There were just three nonmajor bleeding events, and one early withdrawal from apixaban due to an allergic reaction manifesting as generalized edema.

“Further study is needed to validate this as a potential primary prophylaxis in patients receiving IMiDs for multiple myeloma,” Dr. Cornell said.

He reported having no financial disclosures. Millennium Pharmaceuticals is a sponsor of the PROTECT trial.

WASHINGTON – Proteasome inhibitors are essential components of therapeutic regimens for multiple myeloma, but at least one member of this class of life-extending agents, carfilzomib (Kyprolis), is also associated with a significant increase in risk of heart failure, cautioned a specialist in plasma cell disorders.

Neil Osterweil/MDedge News

In addition, immunomodulating agents such as lenalidomide (Revlimid) and pomalidomide (Pomalyst) are associated with increased risk for thromboembolic events, said R. Frank Cornell, MD, clinical director of plasma cell disorders at Vanderbilt University Medical Center in Nashville, Tenn.

In an ongoing, prospective study comparing rates of cardiac adverse events in patients receiving carfilzomib or another proteasome inhibitor, bortezomib (Velcade), Dr. Cornell and his colleagues found that while there were no significant differences in progression-free survival (PFS) or overall survival (OS) between the treatments, “patients who experienced a cardiovascular event had significantly worse progression-free and overall survival compared to those that did not have a cardiovascular event,” he said at the American College of Cardiology’s Advancing the Cardiovascular Care of the Oncology Patient meeting.

The Prospective Observation of Cardiac Safety With Proteasome Inhibition (PROTECT) trial, scheduled for completion in August 2019, enrolled 95 patients with relapsed multiple myeloma and randomly assigned them on a 2:1 basis to receive carfilzomib or bortezomib.

The investigators found that cardiovascular adverse events occurred in 33 of the 65 patients (51%) randomized to carfilzomib, compared with 5 of 30 patients (17%) assigned to bortezomib.

The events included grade 1 or 2 heart failure (HF) in 12 patients on carfilzomib vs. 2 on bortezomib, and grade 3 or 4 HF in 11 vs. 1, respectively. Hypertension was significantly more frequent among patients on carfilzomib, and one patient on carfilzomib died from the acute coronary syndrome 24 hours after receiving carfilzomib in the second week of treatment.

The investigators found that both B-type natriuretic peptide (BNP) and N-terminal pro b-type natriuretic peptide (NT-proBNP) were highly predictive of cardiovascular adverse events. Patients on carfilzomib who had levels of the markers above normal at baseline had an odds ratio (OR) for cardiovascular events of 7.39 (P less than .0001), and those with BNP or NT-proBNP increases at week 2 or 3 during cycle 1 had an OR for a cardiovascular adverse event of 63.5 (P less than .001).

In multivariate analysis, the risk for cardiovascular events for patients treated with carfilzomib was significantly lower for patients with one or no traditional cardiovascular risk factors, compared with patients with two or more.

“Prospective monitoring with natriuretic peptides should be considered, particularly early in treatment,” Dr. Cornell said.
 

IMiDs and thromboembolism

In early clinical trials of immunomodulators (IMiDs) for multiple myeloma, investigators saw that the incidence of thromboembolic events was lower among patients who received thromboprophylaxis than among those who did not, Dr. Cornell noted.

“From this, certain guidelines have been developed such that all patients considered to be at risk should at least receive an aspirin, 81-325 mg, and patients at higher risk for thromboembolism should receive low-molecular-weight heparin or therapeutic-dose warfarin,” he said.

There is little guidance, however, about the use of direct oral anticoagulants in this population, he added, a fact that prompted him and his colleagues in oncology and cardiology to perform a pilot study of apixaban (Eliquis) for primary prevention of venous thromboembolism (VTE) in patients with multiple myeloma who were receiving immunodulatory drugs.

Results of the pilot study, reported in a poster session at the 2018 annual meeting of the American Society of Hematology, showed that among 50 patients who received apixaban 2.5 mg twice daily for 6 months during IMiD therapy, there were no VTEs, stroke, or myocardial infarction, and no episodes of major bleeding. There were just three nonmajor bleeding events, and one early withdrawal from apixaban due to an allergic reaction manifesting as generalized edema.

“Further study is needed to validate this as a potential primary prophylaxis in patients receiving IMiDs for multiple myeloma,” Dr. Cornell said.

He reported having no financial disclosures. Millennium Pharmaceuticals is a sponsor of the PROTECT trial.

WASHINGTON – Proteasome inhibitors are essential components of therapeutic regimens for multiple myeloma, but at least one member of this class of life-extending agents, carfilzomib (Kyprolis), is also associated with a significant increase in risk of heart failure, cautioned a specialist in plasma cell disorders.

Neil Osterweil/MDedge News

In addition, immunomodulating agents such as lenalidomide (Revlimid) and pomalidomide (Pomalyst) are associated with increased risk for thromboembolic events, said R. Frank Cornell, MD, clinical director of plasma cell disorders at Vanderbilt University Medical Center in Nashville, Tenn.

In an ongoing, prospective study comparing rates of cardiac adverse events in patients receiving carfilzomib or another proteasome inhibitor, bortezomib (Velcade), Dr. Cornell and his colleagues found that while there were no significant differences in progression-free survival (PFS) or overall survival (OS) between the treatments, “patients who experienced a cardiovascular event had significantly worse progression-free and overall survival compared to those that did not have a cardiovascular event,” he said at the American College of Cardiology’s Advancing the Cardiovascular Care of the Oncology Patient meeting.

The Prospective Observation of Cardiac Safety With Proteasome Inhibition (PROTECT) trial, scheduled for completion in August 2019, enrolled 95 patients with relapsed multiple myeloma and randomly assigned them on a 2:1 basis to receive carfilzomib or bortezomib.

The investigators found that cardiovascular adverse events occurred in 33 of the 65 patients (51%) randomized to carfilzomib, compared with 5 of 30 patients (17%) assigned to bortezomib.

The events included grade 1 or 2 heart failure (HF) in 12 patients on carfilzomib vs. 2 on bortezomib, and grade 3 or 4 HF in 11 vs. 1, respectively. Hypertension was significantly more frequent among patients on carfilzomib, and one patient on carfilzomib died from the acute coronary syndrome 24 hours after receiving carfilzomib in the second week of treatment.

The investigators found that both B-type natriuretic peptide (BNP) and N-terminal pro b-type natriuretic peptide (NT-proBNP) were highly predictive of cardiovascular adverse events. Patients on carfilzomib who had levels of the markers above normal at baseline had an odds ratio (OR) for cardiovascular events of 7.39 (P less than .0001), and those with BNP or NT-proBNP increases at week 2 or 3 during cycle 1 had an OR for a cardiovascular adverse event of 63.5 (P less than .001).

In multivariate analysis, the risk for cardiovascular events for patients treated with carfilzomib was significantly lower for patients with one or no traditional cardiovascular risk factors, compared with patients with two or more.

“Prospective monitoring with natriuretic peptides should be considered, particularly early in treatment,” Dr. Cornell said.
 

IMiDs and thromboembolism

In early clinical trials of immunomodulators (IMiDs) for multiple myeloma, investigators saw that the incidence of thromboembolic events was lower among patients who received thromboprophylaxis than among those who did not, Dr. Cornell noted.

“From this, certain guidelines have been developed such that all patients considered to be at risk should at least receive an aspirin, 81-325 mg, and patients at higher risk for thromboembolism should receive low-molecular-weight heparin or therapeutic-dose warfarin,” he said.

There is little guidance, however, about the use of direct oral anticoagulants in this population, he added, a fact that prompted him and his colleagues in oncology and cardiology to perform a pilot study of apixaban (Eliquis) for primary prevention of venous thromboembolism (VTE) in patients with multiple myeloma who were receiving immunodulatory drugs.

Results of the pilot study, reported in a poster session at the 2018 annual meeting of the American Society of Hematology, showed that among 50 patients who received apixaban 2.5 mg twice daily for 6 months during IMiD therapy, there were no VTEs, stroke, or myocardial infarction, and no episodes of major bleeding. There were just three nonmajor bleeding events, and one early withdrawal from apixaban due to an allergic reaction manifesting as generalized edema.

“Further study is needed to validate this as a potential primary prophylaxis in patients receiving IMiDs for multiple myeloma,” Dr. Cornell said.

He reported having no financial disclosures. Millennium Pharmaceuticals is a sponsor of the PROTECT trial.

A safety signal of pulmonary embolism and increased mortality has emerged in a postmarketing trial of tofacitinib (Xeljanz) in patients with rheumatoid arthritis, the Food and Drug Administration reported.

The trial’s Data Safety and Monitoring Board identified the signal in patients taking a 10-mg dose of tofacitinib twice daily, the FDA said in a safety announcement.

Pfizer, the trial’s sponsor, took “immediate action” to transition patients in the ongoing trial from the 10-mg, twice-daily dose to 5 mg twice daily, which is the approved dose for adult patients with moderate to severe rheumatoid arthritis, the agency said. The 10-mg, twice-daily dose is approved only in the dosing regimen for patients with ulcerative colitis. Xeljanz is also approved to treat psoriatic arthritis. The 11-mg, once-daily dose of Xeljanz XR that is approved to treat rheumatoid arthritis and psoriatic arthritis was not tested in the trial.

The ongoing study was designed to assess risks of cardiovascular events, cancer, and opportunistic infections with tofacitinib 10 mg twice daily or 5 mg twice daily versus the risks in a control group treated with a tumor necrosis factor (TNF) inhibitor, according to the statement.

Patients had to be 50 years of age or older and have at least one cardiovascular risk factor to be eligible for the study, which was required by the agency in 2012 when it approved tofacitinib, the statement says.

The FDA is reviewing trial data and working with Pfizer to better understand the safety signal, its effect on patients, and how tofacitinib should be used, Janet Woodcock, MD, director of the FDA’s Center for Drug Evaluation and Research, said in a news release. The trial will continue and is expected to be completed by the end of 2019.

“The agency will take appropriate action, as warranted, to ensure patients enrolled in this and other trials are protected and that health care professionals and clinical trial researchers understand the risks associated with this use,” she added.

Health care professionals should follow tofacitinib prescribing information, monitor patients for the signs and symptoms of pulmonary embolism, and advise patients to seek medical attention immediately if they experience those signs and symptoms, according to the statement.

“We are communicating now, given the serious nature of the safety issue, to ensure that patients taking tofacitinib are aware that the FDA still believes the benefits of taking tofacitinib for its approved uses continue to outweigh the risks,” Dr. Woodcock said in the release.

While not approved in rheumatoid arthritis, the 10-mg, twice-daily dose of tofacitinib is approved in the dosing regimen for patients with ulcerative colitis, the release says.

A safety signal of pulmonary embolism and increased mortality has emerged in a postmarketing trial of tofacitinib (Xeljanz) in patients with rheumatoid arthritis, the Food and Drug Administration reported.

The trial’s Data Safety and Monitoring Board identified the signal in patients taking a 10-mg dose of tofacitinib twice daily, the FDA said in a safety announcement.

Pfizer, the trial’s sponsor, took “immediate action” to transition patients in the ongoing trial from the 10-mg, twice-daily dose to 5 mg twice daily, which is the approved dose for adult patients with moderate to severe rheumatoid arthritis, the agency said. The 10-mg, twice-daily dose is approved only in the dosing regimen for patients with ulcerative colitis. Xeljanz is also approved to treat psoriatic arthritis. The 11-mg, once-daily dose of Xeljanz XR that is approved to treat rheumatoid arthritis and psoriatic arthritis was not tested in the trial.

The ongoing study was designed to assess risks of cardiovascular events, cancer, and opportunistic infections with tofacitinib 10 mg twice daily or 5 mg twice daily versus the risks in a control group treated with a tumor necrosis factor (TNF) inhibitor, according to the statement.

Patients had to be 50 years of age or older and have at least one cardiovascular risk factor to be eligible for the study, which was required by the agency in 2012 when it approved tofacitinib, the statement says.

The FDA is reviewing trial data and working with Pfizer to better understand the safety signal, its effect on patients, and how tofacitinib should be used, Janet Woodcock, MD, director of the FDA’s Center for Drug Evaluation and Research, said in a news release. The trial will continue and is expected to be completed by the end of 2019.

“The agency will take appropriate action, as warranted, to ensure patients enrolled in this and other trials are protected and that health care professionals and clinical trial researchers understand the risks associated with this use,” she added.

Health care professionals should follow tofacitinib prescribing information, monitor patients for the signs and symptoms of pulmonary embolism, and advise patients to seek medical attention immediately if they experience those signs and symptoms, according to the statement.

“We are communicating now, given the serious nature of the safety issue, to ensure that patients taking tofacitinib are aware that the FDA still believes the benefits of taking tofacitinib for its approved uses continue to outweigh the risks,” Dr. Woodcock said in the release.

While not approved in rheumatoid arthritis, the 10-mg, twice-daily dose of tofacitinib is approved in the dosing regimen for patients with ulcerative colitis, the release says.

A safety signal of pulmonary embolism and increased mortality has emerged in a postmarketing trial of tofacitinib (Xeljanz) in patients with rheumatoid arthritis, the Food and Drug Administration reported.

The trial’s Data Safety and Monitoring Board identified the signal in patients taking a 10-mg dose of tofacitinib twice daily, the FDA said in a safety announcement.

Pfizer, the trial’s sponsor, took “immediate action” to transition patients in the ongoing trial from the 10-mg, twice-daily dose to 5 mg twice daily, which is the approved dose for adult patients with moderate to severe rheumatoid arthritis, the agency said. The 10-mg, twice-daily dose is approved only in the dosing regimen for patients with ulcerative colitis. Xeljanz is also approved to treat psoriatic arthritis. The 11-mg, once-daily dose of Xeljanz XR that is approved to treat rheumatoid arthritis and psoriatic arthritis was not tested in the trial.

The ongoing study was designed to assess risks of cardiovascular events, cancer, and opportunistic infections with tofacitinib 10 mg twice daily or 5 mg twice daily versus the risks in a control group treated with a tumor necrosis factor (TNF) inhibitor, according to the statement.

Patients had to be 50 years of age or older and have at least one cardiovascular risk factor to be eligible for the study, which was required by the agency in 2012 when it approved tofacitinib, the statement says.

The FDA is reviewing trial data and working with Pfizer to better understand the safety signal, its effect on patients, and how tofacitinib should be used, Janet Woodcock, MD, director of the FDA’s Center for Drug Evaluation and Research, said in a news release. The trial will continue and is expected to be completed by the end of 2019.

“The agency will take appropriate action, as warranted, to ensure patients enrolled in this and other trials are protected and that health care professionals and clinical trial researchers understand the risks associated with this use,” she added.

Health care professionals should follow tofacitinib prescribing information, monitor patients for the signs and symptoms of pulmonary embolism, and advise patients to seek medical attention immediately if they experience those signs and symptoms, according to the statement.

“We are communicating now, given the serious nature of the safety issue, to ensure that patients taking tofacitinib are aware that the FDA still believes the benefits of taking tofacitinib for its approved uses continue to outweigh the risks,” Dr. Woodcock said in the release.

While not approved in rheumatoid arthritis, the 10-mg, twice-daily dose of tofacitinib is approved in the dosing regimen for patients with ulcerative colitis, the release says.

While treatment with rivaroxaban did not significantly reduce venous thromboembolism incidence in high-risk ambulatory patients with cancer over the entire course of a 180-day intervention period (6.0% vs. 8.8% in controls; hazard ratio, 0.66; 95% confidence interval, 0.40-1.09), it did reduce major bleeding incidence while patients were on treatment (2.0% vs. 6.4%; HR, 0.40; 95% CI, 0.20 0.80), according to results from the multicenter, randomized, double-blind, placebo-controlled, parallel-group, phase 3b CASSINI trial published in the New England Journal of Medicine (2019 Feb 20. doi: 10.1056/NEJMoa1814630).

We reported this story at the annual meeting of the American Society of Hematology before it was published in the journal. Find our coverage at the link below.

[email protected]

While treatment with rivaroxaban did not significantly reduce venous thromboembolism incidence in high-risk ambulatory patients with cancer over the entire course of a 180-day intervention period (6.0% vs. 8.8% in controls; hazard ratio, 0.66; 95% confidence interval, 0.40-1.09), it did reduce major bleeding incidence while patients were on treatment (2.0% vs. 6.4%; HR, 0.40; 95% CI, 0.20 0.80), according to results from the multicenter, randomized, double-blind, placebo-controlled, parallel-group, phase 3b CASSINI trial published in the New England Journal of Medicine (2019 Feb 20. doi: 10.1056/NEJMoa1814630).

We reported this story at the annual meeting of the American Society of Hematology before it was published in the journal. Find our coverage at the link below.

[email protected]

While treatment with rivaroxaban did not significantly reduce venous thromboembolism incidence in high-risk ambulatory patients with cancer over the entire course of a 180-day intervention period (6.0% vs. 8.8% in controls; hazard ratio, 0.66; 95% confidence interval, 0.40-1.09), it did reduce major bleeding incidence while patients were on treatment (2.0% vs. 6.4%; HR, 0.40; 95% CI, 0.20 0.80), according to results from the multicenter, randomized, double-blind, placebo-controlled, parallel-group, phase 3b CASSINI trial published in the New England Journal of Medicine (2019 Feb 20. doi: 10.1056/NEJMoa1814630).

We reported this story at the annual meeting of the American Society of Hematology before it was published in the journal. Find our coverage at the link below.

[email protected]

SAN DIEGO – In critically ill patients receiving pharmacologic thromboprophylaxis, adjunct intermittent pneumatic compression (IPC) had no effect on the rates of lower-limb deep vein thrombosis (DVT), according to a new trial.

Jim Kling/MDedge News

“I was surprised. My hypothesis was that it would work,” said lead author Yaseen M. Arabi, MD, chairman of the intensive care department at King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.

Many physicians routinely carry out the practice on the assumption that IPC should lead to better blood flow and further cut DVT risk. The procedure carries few risks, aside from patient discomfort. “The main issue is that it’s not needed. It might be useful in patients who are not receiving heparin or low-molecular-weight heparin,” said Dr. Arabi, who presented the results of the study at the Critical Care Congress sponsored by the Society of Critical Care Medicine. The study was simultaneously published online in the New England Journal of Medicine.

Unfractionated or low-molecular-weight heparin reduces the risk of DVT by about 50%, but about 5%-20% of critically ill patients will develop DVT in spite of treatment, and mechanical thromboprophylaxis reduces DVT risk, compared with no prophylaxis. Some researchers have attempted to address whether adjunct intermittent pneumatic compression could further reduce DVT risk, but their studies were marked by a lack of controls, unoptimized pharmacologic regimens, and other limitations.

The trial included 2,003 adults from 20 sites in Saudi Arabia, Canada, Australia, and India, who were expected to have an intensive care unit stay of at least 72 hours. They were randomized to receive IPC combined with pharmacologic thromboprophylaxis (pneumatic compression group) or pharmacologic thromboprophylaxis alone (control).

SOURCE: Arabi Y et al. CCC48, Abstract 142. N Engl J Med Feb 18. doi: 10.1056/NEJMoa1816150.

SAN DIEGO – In critically ill patients receiving pharmacologic thromboprophylaxis, adjunct intermittent pneumatic compression (IPC) had no effect on the rates of lower-limb deep vein thrombosis (DVT), according to a new trial.

Jim Kling/MDedge News

“I was surprised. My hypothesis was that it would work,” said lead author Yaseen M. Arabi, MD, chairman of the intensive care department at King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.

Many physicians routinely carry out the practice on the assumption that IPC should lead to better blood flow and further cut DVT risk. The procedure carries few risks, aside from patient discomfort. “The main issue is that it’s not needed. It might be useful in patients who are not receiving heparin or low-molecular-weight heparin,” said Dr. Arabi, who presented the results of the study at the Critical Care Congress sponsored by the Society of Critical Care Medicine. The study was simultaneously published online in the New England Journal of Medicine.

Unfractionated or low-molecular-weight heparin reduces the risk of DVT by about 50%, but about 5%-20% of critically ill patients will develop DVT in spite of treatment, and mechanical thromboprophylaxis reduces DVT risk, compared with no prophylaxis. Some researchers have attempted to address whether adjunct intermittent pneumatic compression could further reduce DVT risk, but their studies were marked by a lack of controls, unoptimized pharmacologic regimens, and other limitations.

The trial included 2,003 adults from 20 sites in Saudi Arabia, Canada, Australia, and India, who were expected to have an intensive care unit stay of at least 72 hours. They were randomized to receive IPC combined with pharmacologic thromboprophylaxis (pneumatic compression group) or pharmacologic thromboprophylaxis alone (control).

SOURCE: Arabi Y et al. CCC48, Abstract 142. N Engl J Med Feb 18. doi: 10.1056/NEJMoa1816150.

SAN DIEGO – In critically ill patients receiving pharmacologic thromboprophylaxis, adjunct intermittent pneumatic compression (IPC) had no effect on the rates of lower-limb deep vein thrombosis (DVT), according to a new trial.

Jim Kling/MDedge News

“I was surprised. My hypothesis was that it would work,” said lead author Yaseen M. Arabi, MD, chairman of the intensive care department at King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.

Many physicians routinely carry out the practice on the assumption that IPC should lead to better blood flow and further cut DVT risk. The procedure carries few risks, aside from patient discomfort. “The main issue is that it’s not needed. It might be useful in patients who are not receiving heparin or low-molecular-weight heparin,” said Dr. Arabi, who presented the results of the study at the Critical Care Congress sponsored by the Society of Critical Care Medicine. The study was simultaneously published online in the New England Journal of Medicine.

Unfractionated or low-molecular-weight heparin reduces the risk of DVT by about 50%, but about 5%-20% of critically ill patients will develop DVT in spite of treatment, and mechanical thromboprophylaxis reduces DVT risk, compared with no prophylaxis. Some researchers have attempted to address whether adjunct intermittent pneumatic compression could further reduce DVT risk, but their studies were marked by a lack of controls, unoptimized pharmacologic regimens, and other limitations.

The trial included 2,003 adults from 20 sites in Saudi Arabia, Canada, Australia, and India, who were expected to have an intensive care unit stay of at least 72 hours. They were randomized to receive IPC combined with pharmacologic thromboprophylaxis (pneumatic compression group) or pharmacologic thromboprophylaxis alone (control).

SOURCE: Arabi Y et al. CCC48, Abstract 142. N Engl J Med Feb 18. doi: 10.1056/NEJMoa1816150.