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TIMI Study Group, Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
Published: July 2018
AI Article Synopsis
Article Abstract
Background: Net clinical outcome analyses of acute coronary syndrome (ACS) mingle fatal or irreversible events with survivable or reversible events that vary significantly in clinical impact.
Objectives: A comparison of efficacy and safety limited to fatal or irreversible ischemic and adverse or seriously harmful events is one way to assess net clinical outcome and risk-benefit overall, given the fact that these events have a similar clinical impact.
Methods: In the ATLAS ACS 2-TIMI 51 (Anti-Xa Therapy to Lower Cardiovascular Events in Addition to Standard Therapy in Subjects with Acute Coronary Syndrome-Thrombolysis In Myocardial Infarction) trial of rivaroxaban in the secondary prevention of events among patients with ACS treated with aspirin plus clopidogrel or ticlopidine (clopidogrel/ticlopidine) or aspirin alone, fatal and irreversible efficacy events including nonbleeding cardiovascular death, myocardial infarction, and ischemic stroke were compared to fatal or irreversible safety events, including fatal and intracranial bleeding.
Results: Rivaroxaban, 2.5 mg orally twice per day, in patients treated with aspirin and clopidogrel/ticlopidine was associated with 115 (95% confidence interval [CI]: 18 to 212) fewer fatal or irreversible ischemic events (663 for placebo vs. 548 for therapy) and 10 (95% CI: -11 to 32) additional fatal or irreversible seriously harmful events (33 vs. 23 for placebo) per 10,000 patient-years of exposure. Taken together, there would be 105 (95% CI: 6 to 204) fatal or irreversible events prevented per 10,000 patient-years of exposure to rivaroxaban compared with placebo, with 11 (10 of 115) fatal or irreversible ischemic events prevented for each fatal or irreversible seriously harmful event caused. If only nonbleeding cardiovascular death is included as a fatal or irreversible event, then 95 events would be prevented per 10,000 patient-years of exposure in the group taking 2.5 mg orally twice per day.
Conclusions: Both fatal or irreversible ischemia and bleeding are clinically significant events that can be compared to assess the net clinical outcomes associated with therapy. Rivaroxaban therapy at an oral dose of 2.5 mg twice daily in patients treated with aspirin and clopidogrel is associated with a net reduction in fatal or irreversible events. (Anti-Xa Therapy to Lower Cardiovascular Events in Addition to Standard Therapy in Subjects with Acute Coronary Syndrome-Thrombolysis In Myocardial Infarction [ATLAS ACS 2-TIMI 51]; NCT00809965).
