Introduction Etiological identification of young patients with heart failure should always be a medical goal. In this scenario, infectious myocarditis is a possible diagnosis and, when it occurs, it has a benign course in the majority of cases. However, congenital heart diseases or familial forms of cardiomyopathy should be considered in differential diagnosis and/or concomitantly, particularly in more severe presentations of myocarditis. In these cases, in addition to specific investigation for myocarditis, which may include clinical evaluation, imaging exams, laboratory […]