Key result
Radiofrequency catheter ablation guided by a Purkinje potential resulted in successful ablation of an unmappable monomorphic postinfarction ventricular tachycardia.
Case Report (n=1)
Purkinje potential-guided ablation during sinus rhythm is a viable strategy for hemodynamically unstable, unmappable postinfarction ventricular tachycardia.
Purkinje potential-guided ablation enables treatment of unmappable post-MI VT; extends substrate mapping strategies in scar-related arrhythmias.
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.
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Kiedrowicz et al. (2011) conducted a case report in Monomorphic postinfarction ventricular tachycardia (n=1). Radiofrequency catheter ablation guided by a Purkinje potential was evaluated on Successful ablation. Radiofrequency catheter ablation guided by a Purkinje potential resulted in successful ablation of an unmappable monomorphic postinfarction ventricular tachycardia.
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