Ricker Polsdorfer, MD
Arrhythmias are very common, both the harmless type and the dangerous type. An arrhythmia can be caused by:
The most common cause of dangerous arrhythmias is a heart attack. When the heart is deprived of adequate blood supply during a heart attack, its electrical activity can become erratic. Diseased heart valves and diseased heart muscle, direct injury to the heart, diseases that alter the body's chemical balance, and several kinds of medication can also upset the heart's circuitry.
The most common causes of arrhythmia include:
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National Heart, Lung, and Blood Institute website. Available at:
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Last reviewed December 2013 by Michael J. Fucci, DO
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