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pacemaker
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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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Case report A 33-year-old woman with a history of sick sinus syndrome underwent a dual chamber pacemaker implantation (Ela DR213 Talent, Ela 4068 for atrial, and BT46D for ventricular leads) seven years ago.
Pacemaker lead failure due to crush injury / Ezilme hasarina bagli ... by Erdogan, Okan; Aktoz, Meryem / The Anatolian Journal of Cardiology (Anadolu Kardiyoloji Dergisi)
Simantirakis and colleagues at Heraklion (Crete) University Hospital, Greece, implanted dual chamber pacemakers in 16 patients with moderate or severe sleep apnea, documented sleep-related bradycardias, and normal ventricular function (N.
OSA-hypopnea syndrome: atrial overdrive pacing not useful by Kerr, Martha / Clinical Psychiatry News
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
 
 
 
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