Figure 1.

Primary outcome, by clinical VT cycle length. The primary outcome was a composite of death at any time or VT storm (three or more documented episodes of VT within 24 h) or appropriate ICD shock after a 30-day treatment period. Kaplan–Meier survival curves for the primary outcome between escalated antiarrhythmic drug therapy and catheter ablation are shown, by presenting VT cycle length, for the overall trial population (N = 259) and for those taking amiodarone at baseline (N = 169). Log-rank P-values and unadjusted hazard ratios (escalated therapy vs. catheter ablation) are also presented. CI, confidence interval; VT, ventricular tachycardia.