Key result
Vitamin K antagonists are inferior to antiplatelet drugs for preventing non-cardioembolic strokes in non-valvular atrial fibrillation, and combining them increases bleeding risk.
Why the study?
Cohorts of patients with non-valvular atrial fibrillation who might benefit from combination antithrombotic therapy to prevent atherothrombotic stroke have not yet been identified.
Does combination therapy with oral anticoagulants and antiplatelet drugs improve outcomes and prevent non-cardioembolic strokes in patients with non-valvular atrial fibrillation?
Does combination therapy with oral anticoagulants and antiplatelet drugs improve outcomes and prevent non-cardioembolic strokes in patients with non-valvular atrial fibrillation?
Answers are grounded in this paper and cite their sources.
Combining oral anticoagulants with antiplatelet drugs in non-valvular atrial fibrillation increases serious bleeding without a general reduction in poor outcomes, though specific high-risk cohorts might benefit.
The review analyzes data on the detection rate of and the abilities to predict and prevent non-cardioembolic strokes in non-valvular atrial fibrillation. According to accumulated facts, vitamin K antagonists in non-valvular atrial fibrillation are noted to be inferior to antiplatelet drugs in efficiency in preventing non-cardioembolic (atherothrombotic in particular) strokes, and the widespread use of oral anticoagulants in combination with antiplatelet drugs does not generally reduce the incidence of poor outcomes, markedly increasing the risk of serious bleeding. Nevertheless, it is conceivable that this combination antithrombotic therapy may be useful for certain categories of patients at the highest risk for atherothrombotic stroke and at relatively low risk for hemorrhagic complications. Cohorts of patients, to whom such an approach should be reasonable considered to be applied, have not yet been identified.
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Yavelov et al. (2019) conducted a review in Non-valvular atrial fibrillation. Vitamin K antagonists / Oral anticoagulants plus antiplatelet drugs vs. Antiplatelet drugs was evaluated on Non-cardioembolic (atherothrombotic) strokes. Vitamin K antagonists are inferior to antiplatelet drugs for preventing non-cardioembolic strokes in non-valvular atrial fibrillation, and combining them increases bleeding risk.
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