DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Bruising in warfarin treatment. Close-up of bruising on the arm and hand of a 90-year-old male patient due to minor trauma while taking warfarin for atrial fibrillation, a heart rhythm abnormality. Warfarin is an anticoagulant (blood-thinning) drug. As such any injury to blood vessels takes longer to clot. Therefore, a patient receiving warfarin will bruise much more easily.
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