Definition of cardioverter
: a medical device for the administration of an electric shock in cardioversion
The cardioverter, which is fully automatic, weighs but 90 g and is inserted like a permanent pacemaker.— John Maurice The silver-colored, pager-size device, called an implantable cardioverter defibrillator, can speed up a slow heart and slow a racing heartbeat.— Susan Page
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Merriam-Webster unabridged
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Time Traveler for cardioverter
The first known use of cardioverter was in 1983
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