Optimal Intensity of Warfarin Therapy for Secondary Prevention of Stroke in Patients with Nonvalvular Atrial Fibrillation

Abstract

For secondary prevention of stroke in persons with NVAF, especially in old patients, the low-intensity warfarin (INR 1.5 to 2. 1) treatment seems to be safer than the conventional-intensity (INR 2.2 to 3.5) treatment.