An abnormal irregular heart rhyt hm whereby electrical
signals are generated chaotically throughout the upper chambers (atria) of the heart.
Although many persons with atrial fibrillation have no symptoms, the most common
symptom is palpitations, an uncomfortable awareness of the rapid and irregular heartbeat.
Atrial fibrillation can cause blood clots that travel from the heart to the brain,
causing stroke. Treatment of atrial fibrillation involves controlling the risk factors,
medications to slow the heart rate and/or convert the heart to normal rhythm, and
preventing complications of blood clotting.
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