Success Stops Drug Trial: Apixaban Prevents Stroke in Patients With Atrial Fibrillation Who Are Unsuitable for Warfarin

Science Daily

The data monitoring committee of the AVERROES study, seeing overwhelming evidence of the success of apixaban in the prevention of stroke in patients with atrial fibrillation who are unsuitable for the conventional treatment of warfarin, has recommended early termination of this study. The decision came after repeated review and careful consideration of all efficacy and safety data.

The study leaders, principal investigator Dr. Stuart J. Connolly, chairman of the steering committee Dr. Salim Yusuf, and project officer Dr. John Eikelboom, have accepted this recommendation, as have the study sponsors, Bristol-Myers Squibb and Pfizer.

Results of the study were presented by Connolly at the annual European Society of Cardiology Congress in Stockholm, Sweden, on August 31.

The AVERROES study enrolled 5,600 patients with atrial fibrillation at risk for stroke who were unsuitable for therapy with a Vitamin K antagonist such as warfarin. These patients were randomized, double-blind, to receive either apixaban or the standard therapy which is Aspirin. The primary efficacy outcome of the AVERROES study was a composite of stroke or systemic embolism and the major safety outcome was major bleeding.

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