Harvard Heart Letter

Ask the doctor: Is it okay to stop taking warfarin when atrial fibrillation stops?

Five years ago, my wife, then age 70, woke up one night with a fluttering heartbeat. Her pulse was also very irregular. We went to the emergency room, where she was diagnosed with atrial fibrillation. Her heart rhythm returned to normal in a few hours as she was being treated with intravenous medication, and has stayed that way ever since. She monitors her pulse rate and rhythm several times a week and has routine follow-ups with her cardiologist. No atrial fibrillation has been seen. She has been taking warfarin ever since this started, and her cardiologist wants her to keep taking it indefinitely. Now that the atrial fibrillation is old history, does she still need to keep taking this drug?
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