Utility Of The Atrial Endocardial Electrogram Concurrent With Dual-Chamber Pacing In The Determination Of A Pacemaker-Mediated Arrhythmia
PACE-PACING AND CLINICAL ELECTROPHYSIOLOGY(1988)
Abstract
A 73-year-old male required a permanent pacemaker for complete heart block. After placement of the dual-chamber pacemaker, the patient developed random, repetitive ventricularly paced coupling at the upper rate limit. The diagnosis made from the surface electrocardiography was one of ventricular tracking of occult (T wave obscured) atrial ectopic activity. Examination of the telemetered atrial electrogram (EGM) revealed a diagnosis of intermittent far-field atrial sensing of the terminal ventricular depolarization. The value of obtaining an atrial electrogram during dual-chamber pacing is discussed.
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Key words
telemetry
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