病毒心肌炎可能是最常见的一种心肌炎，其特征性表现是间质淋巴细胞的浸润。许多病毒心肌炎临床表现不明显，有些可能导致青年人猝死。心肌很少坏死。最常用的病毒是柯萨奇病毒B。
The interstitial lymphocytic infiltrates shown here are characteristic for a viral myocarditis, which is probably the most common type of myocarditis. Many of these cases are probably subclinical. Some may be a cause for sudden death in young persons. There is usually little necrosis. The most common viral agent is Coxsackie B.