Nonidiopathic papillary muscle ventricular arrhythmia ablation using the lattice-tip catheter: A case series
Abstract
Webster) to define PM anatomy and identify optimal ablation targets. The lattice-tip catheter was used exclusively for energy delivery via its dedicated generator console rather than for electroanatomic mapping. Ablation was performed using the standard atrial software presets, the parameters of which have been previously described in detail. 9 The use of the lattice-tip catheter for ventricular arrhythmias was investigational at the time of these procedures, given that the system is Food and Drug Administration approved only for atrial fibrillation and flutter. This off-label application was patient-specific based on the challenging anatomy of the PMs and the failure of the previous conventional ventricular tachycardia (VT) ablation attempts. Intracardiac electrograms from the lattice-tip catheter were used to identify fractionated and abnormal signals at target sites. Ablation lesions were manually annotated as circles on the
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