Ambulatory ECG‐Based T‐Wave Alternans Predicts Sudden Cardiac Death in High‐Risk Post‐MI Patients with Left Ventricular Dysfunction in the EPHESUS Study

Background: Exercise microvolt T‐wave alternans (TWA) identifies sudden cardiac death (SCD) risk. TWA can be measured from ambulatory ECGs (AECGs) using modified moving average (MMA) method. Whether MMA TWA from AECGs predicts SCD in post‐MI patients with left ventricular dysfunction (LVD) is unknown.

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