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Figure 5 Kaplan-Meier Survival Curves Using TWA as the Primary End Point (Study Subjects)

Abnormal T-wave alternans (TWA) separates patients who meet versus those who do not meet the primary end point (p = 0.024). ICD = implantable cardioverter-defibrillator; Rx = treatment; VT/VF = ventricular tachycardia/ventricular fibrillation.