Ventricular Scar At Cardiac CT Correlates To Critical Isthmuses Of Ventricular Tachycardia Circuits And Sites Of Slow Conduction During Sinus Rhythm - Evidence For Clinical Use Of CT Integration Into 3D Mapping Systems

Introduction: Surviving myocardial fibers within scarred myocardium are the underlying substrate of slow conduction leading to scar-related VT. Cardiac CT is feasible in ICD pts, and can depict myocardial scar. We hypothesized that CT derived scar correlates to the electrophysiological VT substrate and particularly to critical isthmuses of VT circuits, abnormal or late activation in sinus rhythm (SR) and low voltage.