Analysis of Dyssynchrony and Ventricular Function in Right Univentricular Stimulation at Different Positions.

Introduction: Chronic stimulation of the right ventricle with pacemaker is associated with ventricular dyssynchrony and loss of contractility, even in subjects without previous dysfunction. In these patients, there is a debate of which pacing site is less associated with loss of ventricular function.

Objective: To compare pacemaker-induced dyssynchrony among different pacing sites in right ventricular stimulation.