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 ?
Pacemaker-mediated tachycardia and runaway pacemaker should be considered in differential diagnosis when spikes are present before the QRS complex during tachycardia.
Runaway pacemaker may be rarely observed, particularly in the emergency unit.
Looking to make it five-in-a-row, runaway pacemakers Hall instead became the first of the club's three teams not to win this season.