Pacemaker repetitive nonreentrant ventriculoatrial synchrony. Why did automatic mode switching occur?

Journal of Electrocardiology
S Serge BaroldFrederic Van Heuverswyn

Abstract

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.

References

Jul 11, 2002·Journal of Cardiovascular Electrophysiology·Michael O Sweeney
Mar 26, 2011·Circulation Journal : Official Journal of the Japanese Circulation Society·Ritsuko KohnoYutaka Otsuji
Nov 30, 2011·Heart Rhythm : the Official Journal of the Heart Rhythm Society·S Serge Barold, Roland X Stroobandt

❮ Previous
Next ❯

Citations

Jan 24, 2015·Journal of the American College of Cardiology·Carol Chen-ScarabelliJonathan L Halperin
Apr 7, 2016·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Parikshit S SharmaJose F Huizar
May 27, 2020·Pacing and Clinical Electrophysiology : PACE·SoJin Y WassMina K Chung
Oct 18, 2018·Journal of Arrhythmia·Mohammad AlastiJeff Alison

❮ Previous
Next ❯

Related Concepts

Related Feeds

Atrial Fibrillation

Atrial fibrillation is a common arrhythmia that is associated with substantial morbidity and mortality, particularly due to stroke and thromboembolism. Here is the latest research.

Cardiomyopathy

Cardiomyopathy is a disease of the heart muscle, that can lead to muscular or electrical dysfunction of the heart. It is often an irreversible disease that is associated with a poor prognosis. There are different causes and classifications of cardiomyopathies. Here are the latest discoveries pertaining to this disease.

Atrial Filbrillation

Atrial fibrillation refers to the abnormal heart rhythm characterized by rapid and irregular beating of the atria. Here is the latest research.

Arrhythmia

Arrhythmias are abnormalities in heart rhythms, which can be either too fast or too slow. They can result from abnormalities of the initiation of an impulse or impulse conduction or a combination of both. Here is the latest research on arrhythmias.

Cardiac Conduction System

The cardiac conduction system is a specialized tract of myocardial cells responsible for maintaining normal cardiac rhythm. Discover the latest research on the cardiac conduction system here.