title: Idiopathic left ventricular tachycardia with block between purkinje potential and ventricular myocardium.
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.
authors.affiliation: First Department of Internal Medicine, Tottori University School of Medicine, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Tomokuni
authors.forename: O
authors.initials: O
authors.lastname: Igawa
authors.forename: Y
authors.initials: Y
authors.lastname: Yamanouchi
authors.forename: M
authors.initials: M
authors.lastname: Adachi
authors.forename: T
authors.initials: T
authors.lastname: Suga
authors.forename: A
authors.initials: A
authors.lastname: Yano
authors.forename: J
authors.initials: J
authors.lastname: Miake
authors.forename: Y
authors.initials: Y
authors.lastname: Inoue
authors.forename: S
authors.initials: S
authors.lastname: Fujita
authors.forename: I
authors.initials: I
authors.lastname: Hisatome
authors.forename: C
authors.initials: C
authors.lastname: Shigemasa
mesh_terms: D000328:Adult; D017115:Catheter Ablation; D004562:Electrocardiography; D006352:Heart Ventricles / Q000503:physiopathology* / Q000601:surgery; D006801:Humans; D008297:Male; D011690:Purkinje Fibers / Q000503:physiopathology* / Q000601:surgery; D017180:Tachycardia, Ventricular / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D016277:Ventricular Function, Left / Q000502:physiology