title: Isolated focus of ventricular fibrillation.
abstract: Mechanisms underlying the initiation of ventricular tachycardia have been described as either rapidly firing focus initiated by triggered activity or automaticity, or a reentrant wavefront initiated by a premature ventricular depolarization. Ventricular fibrillation can occur after ventricular tachycardia; however, uncertainty exists concerning its mechanism, whether it is caused by multiple wavelets, mother rotor, or a combination of both. This report describes the finding of a spontaneously isolated focus of ultrarapid ventricular activity recorded and ablated in a patient with nonischemic cardiomyopathy and ventricular tachycardia.
authors.affiliation: Hôpital Cardiologique Haut-Lévêque, Bordeaux-Pessac, France. isabellenault@gmail.com
authors.forename: Isabelle
authors.initials: I
authors.lastname: Nault
authors.forename: Sébastien
authors.initials: S
authors.lastname: Knecht
authors.forename: Michel
authors.initials: M
authors.lastname: Haïssaguerre
authors.forename: Pierre
authors.initials: P
authors.lastname: Jaïs
mesh_terms: D017115:Catheter Ablation; D017147:Defibrillators, Implantable; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D014693:Ventricular Fibrillation / Q000503:physiopathology* / Q000517:prevention & control / Q000601:surgery*