Abstract
The involvement of the Purkinje system in a subset of patients with idiopathic ventricular fibrillation or polymorphic VT/VF related to structural heart disease was first demonstrated in the pioneering work of Michel Haissaguerre and co-workers (Circulation 106:962–967, 2002 and Lancet 359:677–678, 2002). It is very important to identify these patients with recurrent episodes of ventricular fibrillation and/or ICD shocks with regard to the presence of triggering premature ventricular contractions (PVC), which may be amenable to mapping and catheter ablation by screening Holter and ICD recordings. The practical problem, which is frequently encountered, is the absence of these PVCs when the patients are brought to the EP lab. However, catheter ablation is an important adjunctive tool to antiarrhythmic drug treatment, beta blocker therapy, and general anesthesia in this setting. Local electrogram criteria related to this phenomenon have been identified guiding mapping and ablation (e.g., low amplitude, high-frequency Purkinje potentials preceding a closely coupled ventricular signal (Fig. 1a)). The favorable long-term follow-up after catheter ablation has been demonstrated in the setting of right and left ventricular Purkinje-related PVCs leading to polymorphic VT/VF (Leenhardt et al., Circulation 89:206–215, 1994) and also following myocardial infarction (Baensch et al., Circulation 108:3011–3016, 2003) and right ventricular outflow tract-associated VF (Noda et al., Journal of the American College of Cardiology 46:1288–1294, 2005). Most recently, epicardial ablation strategies leading to suppression of polymorphic VT/VF episodes related to the Brugada syndrome have been described irrespective to the presence of premature ventricular beats (Nademanee et al., Circulation 123:1270–1279, 2011).
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Willems, S., Hoffmann, B.A., Schaeffer, B. et al. Mapping and ablation of ventricular fibrillation—how and for whom?. J Interv Card Electrophysiol 40, 229–235 (2014). https://doi.org/10.1007/s10840-014-9886-y
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DOI: https://doi.org/10.1007/s10840-014-9886-y