(1)病毒通过血液循环直接侵犯心肌、心内膜、心外膜,在细胞内繁殖,引起细胞溶解、水肿、坏死、心肌断裂及细胞浸润等改变。急性暴发性心肌炎可能属于此种情况。也很可能同时有细菌和病毒混合感染协同破坏心肌组织,使病情恶化凶险。(2)病毒感染后并不直接侵犯心肌组织,而是对病毒抗原产生自身免疫的结果。实验证明病毒可以感染免 (1) The virus directly invades the myocardium, endocardium and epicardium through the blood circulation and multiplies in the cells, causing changes of cell lysis, edema, necrosis, myocardial rupture and cell infiltration. Acute fulminant myocarditis may be the case. It is also likely that both bacterial and viral infections simultaneously destroy myocardial tissue, making the condition worse off. (2) virus infection does not directly affect the myocardial tissue, but the result of autoimmunity of the virus antigen. Experiments show that the virus can be infected with immunity