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Background Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited cardiomyopathy characterized by right ventricular dysfunction and ventricular arrhythmias.Studies have shown that ARVC is present in up to 20% of individuals who experience sudden cardiac death (SCD) and is even more common among athletes who die suddenly.Improved prognostic indices are needed to identify risk for sudden cardiac arrest from ventricular arrhythmias in ARVC patients.Our study explored the characteristics of microvolt T-wave altemans (MTWA) in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC) and its predictive value of ventrieular arrhythmia events.