Aspirin Not the Best Antiplatelet for CAD Secondary Prevention in Meta-Analysis

17 Jul 2023 • The antiplatelet of choice for long-term, secondary prevention for patients with established coronary artery disease (CAD) may well be a P2Y12 inhibitor such as clopidogrel or ticagrelor rather than aspirin, suggests a patient-level meta-analysis of seven randomized trials. Aspirin is the only antiplatelet agent with a Class I recommendation for long-term prevention of cardiovascular events in patients with coronary artery disease (CAD). There has been inconsistent evidence on how it compares with alternative antiplatelet agents.

  • The more than 24,000 patients in the meta-analysis, called PANTHER, had documented stable CAD, prior myocardial infarction (MI), or recent or remote surgical or percutaneous coronary revascularization.
  • About half of patients in each antiplatelet monotherapy trial received clopidogrel or ticagrelor, and the other half received aspirin. Follow-ups ranged from 6 months to 3 years
  • Risk of the primary outcome was lower with P2Y12 inhibitor monotherapy compared with aspirin over 2 years, mainly owing to less myocardial infarction.
  • Major bleeding was similar and net adverse clinical events were lower with P2Y12 inhibitors. The treatment effect was consistent across prespecified subgroups and types of P2Y12 inhibitors

Given its superior efficacy and similar overall safety, P2Y12 inhibitor monotherapy might be preferred over aspirin monotherapy for long-term secondary prevention in patients with established CAD, the study authors concluded.

Source: JACC | Read full story

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