What causes atrial fibrillation?


Quick Answer

Mayo Clinic states that atrial fibrillation can be caused by high blood pressure, myocardial infarctions, abnormal heart valves, congenital heart defects, coronary artery disease or other conditions that affect the heart and lungs. Some people have atrial fibrillation with no clear underlying cause, often referred to as lone atrial fibrillation.

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What causes atrial fibrillation?
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Full Answer

Atrial fibrillation occurs when the heart receives irregular electrical impulses, causing it to beat quickly and erratically, according to Mayo Clinic. This leads to a resting heartbeat that ranges from 100 to 175 beats per minute, whereas a normal heart beats 60 to 100 times per minute. The condition can lead to strokes or other lasting damage if untreated, but has a good prognosis with treatment.

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