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Mapping Strategy Associated with QRS Morphology for Catheter Ablation in Patients with Idiopathic Ventricular Outflow Tract Tachyarrhythmia

In catheter ablation of idiopathic ventricular arrhythmia (VA), it is still unclear whether pace mapping or activation mapping is more useful for successful catheter ablation. The depth of origin in the ventricular wall especially affects the success rate of endocardial‐approached catheter ablation. Thus, we examined the relationship between these tactics and QRS morphology.