pacemaker

Definition / meaning of pacemaker

An electronic device that is implanted in the body to monitor heart rate and rhythm. It gives the heart electrical stimulation when it does not beat normally. It runs on batteries and has long, thin wires that connect it to the heart. Also called artificial pacemaker and cardiac pacemaker.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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