pacemaker

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pacemaker

1. Anatomy a small area of specialized tissue within the wall of the right atrium of the heart whose spontaneous electrical activity initiates and controls the beat of the heart
2. Med an electronic device for use in certain cases of heart disease to assume the functions of the natural cardiac pacemaker

pacemaker

[′pās‚māk·ər]
(medicine)
A pulsed battery-operated oscillator implanted in the body to deliver electric impulses to the muscles of the lower heart, either at a fixed rate or in response to a sensor that detects when the patient's pulse rate slows or ceases. Also known as cardiac pacemaker; heart pacer.
References in periodicals archive ?
Others have raised concerns that with newer, so-called rate-responsive pacemakers, excessive patient movement, or even relaxant-induced fasciculations, could induce changes in pacemaker function.
Certainly, pacing at inappropriate rates under anaesthesia due to electromagnetic interference from diathermy or monitoring devices has been reported with rate-responsive pacemakers (14-18).
Minute ventilation rate-responsive pacemakers (MV-PPM) use physiological monitoring to control the pacemaker output, matching heart rate to increased workload, and have the advantage of not requiring any special implantation techniques (4).