Click on image to view larger version.

Figure 1 Risk stratification of ventricular tachyarrhythmic events. Kaplan-Meier survival curves are shown for each of the three tests evaluated. A: T-wave alternans; B: Signal averaged electrocardiography; C: Programmed ventricular stimulation. EPS = programmed ventricular stimulation during electrophysiology study; SAECG = signal averaged electrocardiogram; TWA = T-wave alternans.