Key result
Entrainment mapping localizes the upper turnaround of verapamil-sensitive left ventricular tachycardia to the His bundle.
Case Report (n=1)
This case report demonstrates that the upper turnaround of the reentrant circuit in verapamil-sensitive idiopathic left ventricular tachycardia can be located near the His-bundle area.
Suggests His-bundle as potential ablation target in verapamil-sensitive left VT; hypothesis-generating and needs confirmation before practice change.
Most cases of verapamil-sensitive idiopathic left ventricular tachycardia (ILVT) with right bundle branch block and superior axis pattern have been reported as a reentrant circuit with slow conduction to the left posterior fascicle through the septal Purkinje fiber.1–4 However, the exact anatomic structure of the reentrant circuit, particularly upper turnaround, has not been fully elucidated.
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Fujiki et al. (2015) conducted a case report in Verapamil-sensitive idiopathic left ventricular tachycardia (n=1). Electrophysiologic study and entrainment mapping was evaluated on Location of the upper turnaround of the reentrant circuit. Electrophysiologic mapping and entrainment demonstrated that the upper turnaround of the reentrant circuit in verapamil-sensitive idiopathic left ventricular tachycardia was located at the His-bundle.
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