Journal of Cardiovascular Medicine and Cardiology 

 

Case Report

Potential Arrhythmogenic Risk of DDI/DDD Pacing Modes During Atrial Fibrillation

A: The picture shows intracardiac EGMs with the onset and the termination of the non-sustained ventricular tachycardia (arrow). B: The enlargement shows the precise mechanism responsible for the development of ventricular tachycardia. A paced atrial beat (red circle) following some undersensed atrial beats, during atrial fibrillation, began a ventricular blanking period; during this time interval, an intrinsic ventricular depolarization occurred and was not detected by the device. So, the following ventricular stimulation (blue circle) was delivered during the vulnerable T-wave of “not-detected” ventricular intrinsic beat triggering a run of ventricular tachycardia.

http://www.peertechz.com/Cardiovascular-Medicine-Cardiology/JCMC-1-108.php 

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