Pacemaker
81ventricular 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… …
82cardiac pacemaker — An electronic device that is implanted in the body to monitor heart rate and rhythm. It gives the heart electrical stimulation when it does not beat normally. A cardiac pacemaker runs on batteries and has long, thin wires that connect it to the… …
83Diaphragmatic pacemaker — A diaphragmatic pacemaker, in medicine, is a surgically implanted device used to help patients breathe following complications from spinal cord injuries. The device works through pacing of the diaphragm. Mechanism In patients with a diaphragmatic …
84atrial demand inhibited pacemaker — an artificial cardiac pacemaker that delivers stimuli to the atrium at a fixed rate in the absence of sensed atrial activity; spontaneous cardiac activity causes inhibition of pacemaker output, termination of the current stimulation cycle, and… …
85atrial synchronous ventricular inhibited pacemaker — a dual chamber cardiac pacemaker similar to an atrial synchronous ventricular pacemaker but able to sense ventricular as well as atrial activity. Called also VDD p …
86demand pacemaker — an implanted pacemaker whose generator stimulus is inhibited for a set interval (refractory period) by a signal derived from depolarization (normal or ectopic), thus minimizing the risk of pacemaker induced ventricular fibrillation …
87external pacemaker — external cardiac pacemaker an artificial cardiac pacemaker located outside the body with output wires connected to circular chest electrodes, with a wire sewn directly into the heart, or with an electrode inserted through an intravenous catheter …
88radiofrequency pacemaker — an artificial cardiac pacemaker consisting of an antenna coil on the skin and a subcutaneously implanted receiving coil with an electrode inserted into the ventricular myocardium. Pulses from a lightweight radio transmitter carried by the patient …
89runaway pacemaker — a malfunctioning artificial cardiac pacemaker that abruptly accelerates its pacing rate, resulting in pacemaker induced ventricular tachycardia …
90universal pacemaker — a term sometimes used to describe a DDD pacemaker, emphasizing that because it can be programmed to operate in one of numerous possible pacemaker modes under specific circumstances, it can be made to most closely approximate normal… …
