Definition of Cardiac pacemaker
1. Noun. A specialized bit of heart tissue that controls the heartbeat.
Medical Definition of Cardiac pacemaker
1. An electrical device which delivers a small stimulant shock to the heart to effect cardiac contraction at a pre-determined rate. Many of today's pacemakers have two main components: the electrodes and the transducer (pulse generator). The electrodes are wires which are placed into the circulatory system and make physical contact with the heart muscle. A small electrical discharge from the pacemaker electrode stimulates the muscular wall of the heart to contract, thus pumping blood in an organised fashion. The transducer is a small device, usually implanted under the skin, that generates the electrical discharge at a pre-determined frequency. Transducers can monitor your heart's rate of contraction and deliver an electrical shock only when the heart is going too slow. (27 Sep 1997)
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Lexicographical Neighbors of Cardiac Pacemaker
Literary usage of Cardiac pacemaker
Below you will find example usage of this term as found in modern and/or classical literature:
1. Identifying Health Technologies That Work: Searching For Evidence by DIANE Publishing Company (1996)
"cardiac pacemaker Implantation A marked decrease in the use of cardiac pacemakers occurred in the early 1980s. The decrease has been credited to the ..."
2. The Medical Clinics of North America by Michael C. Fiore, Stephen S. Entman, Charles B. Rush (1920)
"The rhythmic cardiac impulse originates in a small collection of specialized tissue, the sino-auricular node or cardiac "pacemaker," located in the sulcus ..."
3. Proceedings of the Society for Experimental Biology and Medicine (1903)
"These results confirm that the brad) cardia is not due to a direct effect of Ptil. on cardiac ' pacemaker cells but rather is reflexly mediated by vagal ..."
4. Clinical Research: Hearing Before the Committee on Appropriations, U.S. Senate edited by Mark O. Hatfield (1996)
"Examples of innovative clinical discoveries which have changed how medicine is practiced: cardiac pacemaker.—In the early 1950?s, a practicing thoracic ..."