Changes in the Reentrant Pathway in Verapamil-Sensitive Fascicular Reentrant Ventricular Tachycardia During Ablation
Patrick Tchou1, Khaldoun Tarakji1, Mohamed Kanj1
1Department of Cardiovascular Medicine, Cleveland Clinic Main Campus, Mail Code J2-2, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
Abstract:
The sequence of changes in the QRS morphology and the accompanying cycle lengths of the tachycardia confirm that the reentrant circuit involves the left ventricular myocardium as well as the His Purkinje system as part of the reentrant circuit. The reentrant propagation likely goes from local left ventricular myocardium into a slowly conducting, verapamil-sensitive tissue, which then connects into the inferior fascicle. This case demonstrates that fascicular reentrant tachycardias can generate different QRS morphologies depending on the path of breakout into the myocardium.
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