pacemaker

n. pacesetter; one who sets the example; device inserted into the body which mechanically regulates the heartbeat (Medicine); muscle of the heart which regulates the heartbeat by sending out rhythmic electrical impulses (Anatomy)

Pacemaker may refer to: In biology and medicine:Cardiac pacemaker, a group of cells within the heart that together initiate contractions and set the pace of beatingArtificial pacemaker, a device implanted to provide proper heart rhythm when the body's natural pacemaker does not function properlyBiological pacemaker, use of transplanted cells or genes which act as cardiac pacemaker or transform existing cells into pacemaker cellsBrain pacemaker, a device which sends electrical impulses to the brain in order to relieve depression, epilepsy and other conditionsDiaphragmatic pacemaker, a device used to help patients breathe through pacing of the diaphragm
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Pacemaker /pace·mak·er/ 1. that which sets the pace at which a phenomenon occurs. 2. the natural cardiac pacemaker or an artificial cardiac [more]Pacemaker - Community and Resources

Noun
1. a leading instance in its field; "the new policy will be a pacesetter in community relations"
(synonym) pacesetter
(hypernym) exemplar, example, model, good example
2. a specialized bit of heart tissue that controls the heartbeat
(synonym) cardiac pacemaker, sinoatrial node, SA node
(hypernym) cardiac muscle, heart muscle
3. an implanted electronic device that takes over the function of the natural cardiac pacemaker
(synonym) artificial pacemaker
(hypernym) electronic device
4. a horse used to set the pace in racing
(synonym) pacer, pacesetter
(hypernym) racehorse, race horse, bangtail

n. pacemaker, device inserted into the body which mechanically regulates the heartbeat (Medicine)