Idiopathic Left Ventricular Tachycardia with Block Between Purkinje Potential and Ventricular Myocardium |
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Authors: | AKIRA TOMOKUNI,&dagger ,OSAMU TGAWA,YUMI YAMANOUCHI,MASAMITSU ADACHI,TOSHIMITSU SUGA,AKIO YANO,JUNICHIRO MIAKE,YOSHIAKI INOUE,SHINYA FUJITA,ICHIRO HISATOME,CHIAKI SHIGEMASA |
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Affiliation: | First Department of Internal Medicine, Tottori University School of Medicine, Tottori, Japan |
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Abstract: | 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. |
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Keywords: | idiopathic left ventricular tachycardia earliest and low amplitude Purkinje potential Purkinje potential-ventricular electrogram block radiofrequency current catheter ablatio |
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