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What causes a low heart beat?

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Quick Answer

A low heart rate is sometimes caused by changes in the heart that are the result of aging and diseases that damage the heart's electrical system, according to WebMD. Conditions that can slow electrical impulses through the heart and some medicines for treating heart problems can also cause this condition.

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Full Answer

A heart rate of less than 60 beats per minute in adults is called bradycardia. Some symptoms of a slow heartbeat are fatigue, dizziness, lightheadedness and fainting or near-fainting spells. Prolonged, untreated bradycardia sometimes causes heart failure, loss of consciousness, chest pain and high blood pressure. An artificial pacemaker to speed up the heart rhythm is a possible treatment for bradycardia, and making adjustments to an existing medication routine is another option, according to the American Heart Association.

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