Idiopathic Left Ventricular Tachycardia with Block Between Purkinje Potential and Ventricular Myocardium.

Autor: Tomokuni, Akira, Igawa, Osamu, Yamanouchi, Yumi, Adachi, Masamitsu, Suga, Toshimitsu, Yano, Akio, Miake, Junichiro, Inoue, Yoshiaki, Fujita, Shinya, Hisatome, Ichiro, Shigemasa, Chiaki
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Zdroj: Pacing & Clinical Electrophysiology; Sep1998, Vol. 21 Issue 9, p1824-1827, 4p
Abstrakt: We performed radiofrequency current catheter ablation in a patient with idiopathic LV. While mapping the inferoapical LV septum during tachycardia, spontaneous termination of tachycardia was observed with block between Purkinje (P) potential and ventricular electrogram (P-V block). The cycle length of the tachycardia was associated with prolongation of P-P interval and P-V interval. P potential recording at this site was earliest and at very low amplitude during tachycardia. The radiofrequency current at this site was successful. These findings indicated that Purkinje fiber was a critical part of the tachycardia circuit. Ablation was successful at a site where both an earliest and low amplitude P potential was recorded during tachycardia, and where P-V block that was induced by catheter manipulation was observed during tachycardia. [ABSTRACT FROM AUTHOR]
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