Principal findings
The main finding of our study is that baseline VT inducibility is independently associated with VT recurrences during follow-up in patients with SHD undergoing VT ablation. Thus, patients with no baseline VT inducibility or only 1 VT morphology induced had a significantly higher survival free of VT recurrences when compared with patients with more than 1 VT morphology induced. In the same manner, complete activation mapping during the VT ablation procedure allowing delinitation of the VT circuit was associated with lower VT recurrences. Of note, although no overall relationship between baseline VT inducibility and mortality could be stablished, the combination of inducibility of a single VT morphology and VT activation mapping during the ablation procedure was associated with lower mortality.