Demonstration of a hidden interaction between the aortomitral continuity and the conduction system in a case of idiopathic left ventricular outflow tract ventricular tachycardia

Journal of Arrhythmia
Masahiro Mizobuchi, Yoshihisa Enjoji

Abstract

We describe a case of idiopathic left ventricular outflow ventricular tachycardia. Monomorphic ventricular arrhythmia (VA) with a right bundle branch block morphology and an inferior axis was induced through exercise or isoproterenol infusion. During VA bigeminy, a spiked presystolic potential (PP) preceding the VA with a qrS pattern in the unipolar electrogram was recorded at the aortomitral continuity (AMC). Radiofrequency catheter ablation eliminated the VA despite the persistence of sinus-PP bigeminy. Furthermore, these PP rates were dependent on the preceding sinus rhythm rates. The present case suggests a hidden interaction between the AMC and the conduction system.

References

Jan 1, 1985·International Journal of Cardiology·H Kurosawa, A E Becker
Jan 5, 2001·Pacing and Clinical Electrophysiology : PACE·H HachiyaF Marumo
Oct 9, 2002·Heart·S Y Ho
Feb 13, 2008·Journal of Cardiovascular Electrophysiology·Koji KumagaiHiroaki Shimokawa

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Citations

Sep 15, 2016·Journal of Cardiovascular Electrophysiology·Tamas Szili TorokSing-Chien Yap
Jun 28, 2020·Annals of Noninvasive Electrocardiology : the Official Journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·Yulong Xiong, Hongling Zhu

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