Abnormal rhythm: Atrial fibrillation (af) is a heart rhythm problem due to disorganization of the electrical activity in the atria (upper heart chambers). Af is the most common heart rhythm disorder. Patients with af may have no symptoms or may have symptoms such as decreased energy, palpitations, or heart failure. Af also increases the risk of stroke. Various therapies may be used to treat af and stroke risks.
Answered 7/16/2013
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