Pacemaker repetitive nonreentrant ventriculoatrial synchrony. Why did automatic mode switching occur?
نویسندگان
چکیده
Repetitive nonreentrant ventriculoatrial synchrony during dual-chamber pacing is characterized by long intervals alternating with short intervals. This arrangement activated automatic mode switching in a St Jude dual-chamber pacemaker in which the algorithm requires an atrial sensed event for automatic mode switching initiation. Automatic mode switching activation by an atrial sensed event (retrograde P wave) was puzzling because the programmed postventricular atrial period was longer than the retrograde ventriculoatrial conduction time. The explanation is presented in the form of questions and answers to facilitate the understanding of pacemaker function and complex timing cycles.
منابع مشابه
Repetitive Nonreentrant Ventriculoatrial Synchrony (RNRVAS)
Retrograde ventriculoatrial conduction in persons with implanted dual chamber pacemakers can cause two types of responses. One is the familiar pacemaker mediated endless loop tachycardia. Another less known response is the repititive non-rentrant ventriculoatrial synchrony (RNRVAS). Both conditions produce similar symptoms due to the loss of atrial booster function and the presence of the rever...
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ورودعنوان ژورنال:
- Journal of electrocardiology
دوره 45 4 شماره
صفحات -
تاریخ انتشار 2012