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Antiplatelet Therapy After Noncardioembolic Stroke
Jacoba P Greving1, Hans-Christoph Diener2, Johannes B Reitsma1
1From the Julius Center for Health Sciences and Primary Care (J.P.G., J.B.R., A.A.).
Stroke
|June 11, 2019
Summary
For secondary prevention after noncardioembolic stroke, clopidogrel and aspirin/dipyridamole combination are effective and safe. Aspirin/clopidogrel combination increases major bleeding risk, particularly in younger patients.
Area of Science:
- Neurology
- Cardiology
- Pharmacology
Background:
- Secondary prevention of noncardioembolic stroke and transient ischemic attack (TIA) is crucial.
- Antiplatelet agents are commonly prescribed, but their comparative efficacy and safety profiles require detailed assessment.
- Patient characteristics may influence treatment outcomes.
Purpose of the Study:
- To evaluate the efficacy and safety of different antiplatelet agents for long-term secondary prevention after noncardioembolic stroke or TIA.
- To examine how treatment effects vary based on patient demographic and clinical factors.
Main Methods:
- A network meta-analysis (NMA) of 6 randomized trials involving 43,112 patients.
- Individual patient data were pooled and reanalyzed.
- Outcomes included serious vascular events, major bleeding, and net clinical benefit, with subgroup analyses performed.
Main Results:
- Aspirin/dipyridamole and clopidogrel significantly reduced vascular events compared to aspirin alone.
- Clopidogrel demonstrated a lower risk of major bleeding and intracranial hemorrhage.
- Aspirin/clopidogrel combination showed a higher risk of major bleeding, especially in patients under 65.
Conclusions:
- Clopidogrel and aspirin/dipyridamole combination are favored for long-term secondary stroke prevention, irrespective of patient characteristics.
- Aspirin/clopidogrel combination is associated with increased major bleeding risk.
- Treatment choice should consider individual patient profiles and bleeding risks.
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