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Basic Facts |
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An arrhythmia is an abnormality or disturbance in the rate or rhythm of the heartbeat. |
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Arrhythmias are caused by problems with the heart's electrical system, which causes a heartbeat to begin and sends electrical impulses through the heart. |
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Because the ventricles are primarily responsible for moving blood through the body, ventricular arrhythmias are often more serious than atrial arrhythmias. |
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