title: Successful catheter ablation of unmappable monomorphic postinfarction ventricular tachycardia guided by a Purkinje potential.
abstract: We describe a case of a patient with the history of a monomorphic postinfarction ventricular tachycardia that exhibited a right bundle branch block morphology and a superior axis. Because of electrical and hemodynamic instability of arrhythmia, classical mapping techniques were not applied. An electroanatomic voltage map during sinus rhythm was performed. A Purkinje potential (PP) preceding the QRS complex was recorded at posteroseptal area of a scar. Radiofrequency energy delivery at sites where a PP was detected resulted in a successful ablation.
authors.affiliation: Department of Cardiology, Pomeranian Medical University, Szczecin, Poland.
authors.forename: Radosław
authors.initials: R
authors.lastname: Kiedrowicz
authors.forename: Jarosław
authors.initials: J
authors.lastname: Kaźmierczak
authors.forename: Maciej
authors.initials: M
authors.lastname: Wielusiński
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Peregud-Pogorzelska
mesh_terms: D018780:Body Surface Potential Mapping / Q000379:methods*; D002037:Bundle-Branch Block / Q000175:diagnosis / Q000209:etiology* / Q000517:prevention & control; D017115:Catheter Ablation / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications* / Q000175:diagnosis / Q000601:surgery*; D017180:Tachycardia, Ventricular / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery*; D016896:Treatment Outcome