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Study shows what INR level is best for preventing stroke in patients with atrial fibrillation

BMJ 2003; 327 doi: (Published 18 September 2003) Cite this as: BMJ 2003;327:638
  1. Janice Hopkins Tanne
  1. New York

    Patients with atrial fibrillation who took warfarin in dosages to maintain an international normalised ratio (INR) in the recommended range had fewer ischaemic strokes, less severe strokes, and were less likely to die than patients who took lower doses of warfarin or who took aspirin or no treatment, reports a large study in the New England Journal of Medicine ( 2003; 349: 1019-26).

    Atrial fibrillation can lead to the formation of clots that travel to the brain. It causes 80 000 strokes in the United States each …

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