Atrial fibrillation:An abnormal and irregular heart rhythm in which electrical signals are generated chaotically throughout the upper chambers (atria) of the heart. Many people withatrial fibrillationhave no symptoms. Among those who do, the most common symptom is an uncomfortable awareness of the rapid and irregular heartbeat (palpitations).Atrialfibrillationcan promote the formation ofblood clotsthat travel from the heart to the brain, resulting instroke. Treatment of atrial fibrillation involves risk-factor control, use of medications to slow the heart rate and/or convert the heart to
正常的节奏,和预防blood clots. Also known as auricular fibrillation.
