Isolated focus of ventricular fibrillation.
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.
Nault
Isabelle
I
Hôpital Cardiologique Haut-Lévêque, Bordeaux-Pessac, France. isabellenault@gmail.com
Knecht
Sébastien
S
Haïssaguerre
Michel
M
Jaïs
Pierre
P
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*