Why the study?
Does radiofrequency catheter ablation eliminate Purkinje fiber-related polymorphic and monomorphic ventricular tachycardia in a patient with a structurally normal heart?
Does radiofrequency catheter ablation eliminate Purkinje fiber-related polymorphic and monomorphic ventricular tachycardia in a patient with a structurally normal heart?
Radiofrequency catheter ablation guided by diastolic double potentials successfully eliminated Purkinje fiber-related polymorphic and monomorphic VTs in a patient with a structurally normal heart.
Supports ablation feasibility in refractory Purkinje VT; hypothesis-generating and leaves open need for prospective validation.
We describe a 17-year-old woman with a structurally normal heart in which short-sustained rapid polymorphic ventricular tachycardias (VTs) were repetitively provoked by an antiarrhythmic agent, pilsicainide, and spontaneously changed into a sustained monomorphic VT. The latter was terminated by verapamil and was shown to be due to reentry by entrainment. Those two VTs originated from the Purkinje fibers in the left ventricular septum. Radiofrequency catheter ablation guided by the diastolic double potentials eliminated both VTs. Neither tachycardia recurred over a 5-month follow-up period or during antiarrhythmic drug challenge tests at 1 week, 1 month, and 3 months after the ablation.
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Tsuchiya et al. (2006) studied this question.
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