11/27/2012

Atrial fibrillation patients who take the anticoagulant warfarin were most at risk of developing a hemorrhage during the first month of medication, according to a study of 125,195 patients in Canada. The risk for hemorrhage was as high as 15% during the first 30 days, depending on other risk factors, including hypertension and congestive heart failure. The study appeared in the Canadian Medical Association Journal.

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