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pacemaker
(redirected from dual chamber pacemaker)

    Also found in: Dictionary/thesaurus, Medical, Encyclopedia, Wikipedia 0.02 sec.

pacemaker

In vertebrates, a group of muscle cells in the wall of the heart that contracts spontaneously and rhythmically, setting the pace for the contractions of the rest of the heart. The pacemaker's intrinsic rate of contraction is increased or decreased, according to the needs of the body, by stimulation from the autonomic nervous system. The term also refers to a medical device implanted under the skin of a patient whose heart beats inefficiently. It delivers minute electric shocks to stimulate the heart muscles at regular intervals and restores normal heartbeat.

The latest pacemakers are powered by radioactive isotopes for long life and weigh no more than 15 g/0.5 oz.



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? Mentioned in ? References in periodicals archive
 
NYSE:MDT) today announced that reducing right ventricular pacing to less than 10 percent in patients with dual chamber pacemakers reduced the relative risk of developing persistent atrial fibrillation (AF) by 40 percent compared with conventional dual chamber pacing in a trial of more than 1,000 patients with sinus node disease.
New England Journal of Medicine Study Shows Dramatically Reducing ... by Business Wire
The company has five pending patents that suggest system solutions also for dual chamber pacemakers, for ventricular pacing during atrial fibrillation and for cardiac stimulation with Hemodynamic Guard(TM) (Cardiac stimulation with hemodynamic sensor guard algorithm), which may expand the company's addressable market beyond CRT devices to all implanted pacemakers and defibrillators.
AI Semi Ltd. to Present at Medtech Insight's ``Investment In ... by Business Wire
Although pacemaker optimization can significantly improve a patient's cardiac output, the vast majority of patients with dual chamber pacemakers are not optimized with Echo because it is a time-consuming, expensive and operator-dependent method.
CardioDynamics Announces Publication of BioZ Pacemaker Study in PACE ... by Business Wire
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