title: Coronary sinus mapping to differentiate left versus right ventricular outflow tract tachycardias.
abstract: Outflow tract ventricular tachycardia (OT-VT) can originate from several different segments of the outflow tract. Various ECG criteria have been proposed for localization of OT-VTs. We present two patients, one with left and one with right OT-VT. We used local ventricular electrograms in the coronary sinus to localize the focus of the OT-VT. Mapping of local ventricular electrograms in the coronary sinus may be a simple and effective method for differentiating right versus left ventricular outflow tract tachycardias. However, the diagnostic value and precision of this method should be evaluated in a series of patients before its implementation in the OT-VT ablation decision algorithm.
authors.affiliation: Department of Pacemaker and Electrophysiology, Rajaie Cardiovascular Medical Center, Mellat Park, Tehran, Iran. arya@rhc.ac.ir
authors.forename: Arash
authors.initials: A
authors.lastname: Arya
authors.forename: Majid
authors.initials: M
authors.lastname: Haghjoo
authors.forename: Zahra
authors.initials: Z
authors.lastname: Emkanjoo
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Sadr-Ameli
mesh_terms: D000328:Adult; D017115:Catheter Ablation; D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D017180:Tachycardia, Ventricular / Q000503:physiopathology* / Q000601:surgery*