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The goal of the Watchman LAA Closure Device in Patients With Atrial Fibrillation Versus Long-Term Warfarin Therapy (PREVAIL) trial was to assess the safety and efficacy of left atrial appendage (LAA) occlusion for stroke prevention in patients with atrial fibrillation (AF) compared with long-term warfarin therapy

Is Left Atrial Appendage Occlusion with the Watchman Device a Reasonable Alternative to Anticoagulation with Warfarin?