The ECG in Cardiac Resynchronization Therapy: Influence of Left and Right Ventricular Preactivation and Relation to Acute Response

Abstract

ECG signs of biventricular electrical resynchronization are present over a wide range of LV preactivated VV delays but to a lesser extent during RV preactivation. The presence of complete LBBB and longer Q-LVsense at baseline and signs of biventricular electrical resynchronization during CRT predict higher acute hemodynamic response.