I am a 66 year old, athletic vegan female who has just been diagnosed with atrial fibrillation. I have had some high blood pressure but no other symptoms of heart disease. I am taking medicine to control the pulse rate but am very hesitant to take Coumadin, which I believe will significantly affect my lifestyle. I work full-time, exercise daily and am an avid biker, walker, rower and kayaker. Is there any other medicine I could use to prevent stroke? Could I limit myself to aspirin? Would reducing stress through yoga and meditation help?