Currently, three approaches to permanent cardiac pacing are in common use. Single-chamber pacemaker is a device wherein one pacing lead is implanted in either the right atrium or right ventricle. Dual-chamber pacemaker has two pacing leads, one in the right ventricle and one in the right atrium, this is the most commonly used type of pacemaker. Biventricular pacemaker or cardiac resynchronization therapy (CRT) is a device wherein in addition to single- or dual-chamber right heart pacing leads, a third lead is advanced to the coronary sinus for left ventricular epicardial pacing.
KeywordsPacemaker Conduction abnormality Heart block Pulse generator
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