Late cardiac function of chronic ventricular pacing for congenital complete atrioventricular block

Abstract

The rest pump function of the paced heart was reduced, and the decreased CI was kept by increasing EF. By changing the pacing rates, CI was linearly increased and myocardial function indices correlated significantly. For the exercise, the significant increases of cardiac pump function indices were observed, but the increased CI was not sufficient yet. Myocardial function indices showed-significant chronotropic changes. These were thought to be the physiological response to accelurate the cardiac contractility state.