Ventricular Scar imaging at MRI Correlates to Critical Isthmuses of Ventricular Tachycardia Circuits and Sites of Slow Conduction during Sinus Rhythm - Utility of integrating MR-data into 3D Mapping Systems

Introduction: MRI Delayed Gadolinium enhancement (DE) enables imaging of myocardial scar. We hypothesized that regions of DE correlate to the electrophysiological VT substrate and particularly to critical isthmuses of the VT circuits, regions of abnormal or late activation in sinus rhythm (SR) and low voltage.