ventricular demand triggered pacemaker


ventricular demand triggered pacemaker
an artificial cardiac pacemaker that delivers stimuli to the ventricle at a fixed rate in the absence of sensed ventricular activity; spontaneous cardiac activity triggers pacemaker output, which falls ineffectively in the myocardial refractory period and initiates a new cycle of pacemaker stimulation. Called also VVT p.

Medical dictionary. 2011.

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