title: Radiofrequency catheter ablation of left ventricular outflow tract tachycardia: report of two cases.
abstract: Idiopathic ventricular tachycardia (VT) originating from the left ventricular outflow tract (LVOT) is rare. We report two patients whose QRS configuration during VT commonly showed an inferior axis and monophasic R waves in all the precordial leads. The mechanism of these VTs appeared to be triggered activity. From mapping and ablation, the origin of these VTs was determined to be in the most posterior LVOT, corresponding to the aortomitral continuity (left fibrous trigone).
authors.affiliation: First Department of Internal Medicine, Kyushu University School of Medicine, Fukuoka, Japan.
authors.forename: E
authors.initials: E
authors.lastname: Shimoike
authors.forename: Y
authors.initials: Y
authors.lastname: Ohba
authors.forename: N
authors.initials: N
authors.lastname: Yanagi
authors.forename: S I
authors.initials: SI
authors.lastname: Hiramatsu
authors.forename: N
authors.initials: N
authors.lastname: Ueda
authors.forename: T
authors.initials: T
authors.lastname: Maruyama
authors.forename: Y
authors.initials: Y
authors.lastname: Kaji
authors.forename: S
authors.initials: S
authors.lastname: Kanaya
authors.forename: T
authors.initials: T
authors.lastname: Fujino
authors.forename: Y
authors.initials: Y
authors.lastname: Niho
mesh_terms: D017115:Catheter Ablation; D004562:Electrocardiography; D004594:Electrophysiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D017180:Tachycardia, Ventricular / Q000503:physiopathology* / Q000628:therapy*; D016277:Ventricular Function, Left / Q000502:physiology