Atrial fibrillation, or afib, is a type of heart arrhythmia — or irregular heartbeat — caused by abnormal electrical signals in the upper chambers of your heart (atria). These erratic electrical impulses travel to the lower chambers of your heart or ventricles and cause a rapid, irregular heartbeat.
Some people with afib don’t experience symptoms, while others feel chest pain, fatigue, dizziness or lightheadedness, shortness of breath, and heart palpitations or a fluttering feeling in the chest. Afib may come and go, or be constant.
Treatment for this condition includes surgery, medications, or shock therapy to get the heart rhythm back to normal.
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