Introduction
Ventricular tachycardia (VT) ablation strategies in patients with structural heart disease (SHD) have significantly evolved during the last years. Substrate ablation with complete elimination of the potentially arrhythmogenic substrate has become a standard treatment in this setting and has been related to better acute success rates and reduction of VT recurrences during follow-up1-8. This strategy is usually preferred for patients with hemodynamyic instability during induced VT, advanced heart failure with poor hemodynamic condition or non-inducible patients at the time of the procedure. However, stand-alone substrate ablation has also been advocated as a first ablation strategy even in the absence of these previous conditions thus obviating the evaluation of baseline VT inducibility and the potential utility of VT activation mapping9-13. We sought to evaluate the role of baseline VT inducibility and the influence of activation mapping on outcomes in patients with SHD undergoing VT ablation.