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Figure 2 The relation between T-wave alternans and arrhythmia-free survival in 66 patients is shown in the left panel. Kaplan-Meier life table arrhythmia-free survival compared patients with and without T-wave alternans. In the right panel, arrhythmia-free survival in patients with a positive electrophysiologic (EPS) study is compared to survival in patients in whom ventricular arrhythmias were not induced in EPS study. Note that the predictive values of EPS study and T-wave alternans are essentially indistinguishable in these plots. Reproduced with permission from Rosenbaum et al. (66).