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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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Thus, people who opted for this procedure required an artificial pacemaker implant to stimulate each heartbeat.
Cardiac electricians: radio waves can cure a racing heart by Fackelmann, Kathy A. / Science News
Rythmol SR is contraindicated for patients with congestive heart failure (CHF), cardiogenic shock, marked hypotension, bradycardia, disturbances in cardiac impulse generation and/or conduction (atrioventricular or intraventricular blocks) in the absence of an artificial pacemaker, electrolyte imbalance, bronchospastic disorders, or hypersensitivity to the drug.
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