Figure 3. Survival curves.

Kaplan-Meier survival curves for event-free survival of 74 patients with ischemic and dilated cardiomyopathy. (A) Based on maximum APD₉₀ restitution slope S₂<1 or ≥1, there was no difference in reaching the combined end-point of death and/or appropriate ICD (implantable cardioverter-defibrillator) therapy (p = 0.79). (B) Based on dichotomized ERP/APD₉₀ ratios for S₁, there was no difference in reaching the combined end-point of death and/or appropriate ICD therapy (p = 0.57). (C) Kaplan-Meier survival curves based on negative or positive programmed ventricular stimulation (PVS). Mortality and/or appropriate ICD therapy was higher in patients with positive PVS (p = 0.006).