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A Pacemaker is a device that is placed under the skin of the chest or abdomen to control abnormal heart rhythms. The device works by sending an electrical pulse to the heart which causes the heart to contract at regular intervals.[1] Irregular heart rhythms that are too fast, too slow or just erratic are known as arrhythmias.


  1. "What is a Pacemaker?." Diseases and Conditions Index. National Hearth Lung and Blood Institute. June 2007. Accessed on March 27, 2008.