Acute Myocarditis Presenting with Ventricular Arrhythmias: The Role of CMR in the Differential Diagnosis of ARVD

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We herein present the findings of the case of a 23-year-old man who was hospitalized for ventricular tachycardia (VT) with no previous history of cardiac disease or any family history of sudden death. Based on the clinical features as well as the echographic and MRI results, the patient was diagnosed with both acute viral myocarditis and arythmogenic right ventricular dysplasia (ARVD). The patient underwent implantation of an automatic cardioverter defibrillator. There was no recurrent VT during the 24 month follow-up. This case demonstrates the link between ARVD and myocarditis, and highlights the importance of conducting an RV assessment through a cardiac magnetic resonance (CMR) study in the context of arrhythmia and myocarditis.