Alternative definition : NICHD: Myocarditis that is caused by an infection with a viral agent.; ACC/AHA: Acute viral myocarditis, usually lasting 1-3 d, is characterized by cardiomyocyte
necrosis directly triggered by the viral infection. Humoral and cellular immunologic
responses in the myocardium may persist for months and may result in a chronic postinfectious
autoimmune myocarditis.;