Predictive factors of VT recurrence
Table 5 shows the univariable and multivariable Cox regression analyses of VT recurrence. In the univariable analysis, an LVEF≥35% (HR 0.20; 95% CI 0.06- 0.51; P=0.01) and successful identification and ablation of all clinical VT isthmuses (Group A) (HR 0.22; 95% CI 0.03- 0.74; P=0.01) were associated with fewer VT recurrences (Figure 4). A Cox proportional model was used for the multivariate analysis, and variables with a P<0.10 in the univariable analysis were included in the model. An LVEF≥35% (HR 0.21; 95% CI 0.07- 0.54; P<0.01) and the successful identification and ablation of all clinical VT isthmused (Group A) (HR 0.21; 95% CI 0.03- 0.72; P=0.01) were independent predictors of fewer VT recurrences in the multivariate analysis.