title: Negative participation of the left posterior fascicle in the reentry circuit of verapamil-sensitive idiopathic left ventricular tachycardia.
abstract: Left posterior fascicle and idiopathic Left VT. The left posterior fascicle may be a bystander of the circuit of verapamil-sensitive idiopathic left ventricular tachycardia. During ventricular tachycardia (VT), 3 sequences of potentials were seen at the left posterior septum: diastolic Purkinje potentials propagating from base to apex and presystolic left posterior fascicular potentials and systolic left ventricular (LV) myocardial potentials propagating in the reverse direction. Selective capture of the left posterior fascicle by the sinus beat did not affect the VT cycle length. Entrainment pacing revealed that the retrograde limb of the circuit was not the left posterior fascicle, but the LV myocardium.
authors.affiliation: Department of Cardiology, Ogaki Municipal Hospital, Ogaki, Japan. morishima-i@muc.biglobe.ne.jp
authors.forename: Itsuro
authors.initials: I
authors.lastname: Morishima
authors.forename: Akihiko
authors.initials: A
authors.lastname: Nogami
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Tsuboi
authors.forename: Takahito
authors.initials: T
authors.lastname: Sone
mesh_terms: D000200:Action Potentials; D000889:Anti-Arrhythmia Agents; D002036:Bundle of His / Q000503:physiopathology* / Q000601:surgery; D002304:Cardiac Pacing, Artificial; D017115:Catheter Ablation; D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac; D006352:Heart Ventricles / Q000503:physiopathology* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011690:Purkinje Fibers / Q000503:physiopathology; D054139:Tachycardia, Reciprocating / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D017180:Tachycardia, Ventricular / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D013997:Time Factors; D016896:Treatment Outcome; D016277:Ventricular Function, Left; D014700:Verapamil
chemical_list: D000889:Anti-Arrhythmia Agents; D014700:Verapamil