3.1. Patient Characteristics
During the study period, 84 patients underwent VT ablation, and 64 in whom VT non-inducibility was not achieved at the end of the procedure were studied (Figure 1). The baseline patient characteristics are summarized in Table 1. The mean age was 66 ± 14 years, and 54 patients (84%) were male. The average LV ejection fraction (LVEF) was 38 ± 13%.
The most frequent underling heart disease of the VT was ischemic cardiomyopathy (ICM; 38%); sarcoidosis (23%) and dilated cardiomyopathy (19%) were also common. Thirty-one patients (48%) had electrical storms before the RF ablation, and 19 (30%) had persistent incessant VT at the beginning of the RF procedure.