RESUMEN
Recent years have been marked by a number of published reports that have shown a high frequency of signs of myocardial inflammation in patients with confirmed arrhythmogenic right ventricular cardiomyopathy (ARVC). This article presents a clinical case of typical phenotypic manifestations of ARVC associated with morphometric signs of subacute myocarditis. A 66-year-old man presented to the emergency department with signs of arrhythmogenic shock caused by ventricular tachycardia. Examination detected electrocardiographic signs of (ARVC), visualized signs of right ventricular dilatation, increased trabeculation, and wall fibrosis. Endomyocardial biopsy of the right ventricular wall showed degenerative alterations of cardiomyocytes with perivascular lymphocytic infiltration and areas of granulation tissue. New facts that evidence inflammatory alterations of the myocardium will still require specifying and reconsidering positions of expert consensuses on diagnostics and treatment of ARVC.