小儿病毒性心肌炎有二种类型:(一)急性型:易发生于新生儿时期,但也可发生于任何年龄中,病情发展迅速可在数日内死亡,严重的心律紊乱常见,部分病例伴有病毒性脑炎;(二)亚急性或慢性型;主要发生于2岁以上的儿童,少数发生于1岁以内。患儿常在轻度上呼吸道感染后发病,或其家属最近患过上感,可有发热,由于生后数周左心负荷即较重,因而虽然大部分心肌炎的病变是弥漫的,但临床主要表现为左心衰竭,如呼吸困难、肺部罗音、持久的心动过速,常有奔马律。心脏杂音可有可无,若有,则往往为二、三尖瓣返流性杂音(继发于左右心室扩大)。心尖搏动弱而弥散,并向左下扩展。心音低钝,可呈钟 There are two types of viral myocarditis in children: (A) acute type: easy to occur in the neonatal period, but can also occur at any age, the rapid development of the disease can die within a few days, severe heart rhythm disorders common, in some cases with Viral encephalitis; (B) subacute or chronic type; mainly occurs in children over the age of 2, a few occurred within 1 year of age. Children often have mild upper respiratory tract infection, or their families recently had a sense of flu, may have fever, due to a few weeks after birth left heart load that is heavier, and thus although most of the myocarditis lesions are diffuse, but the main clinical manifestations Left heart failure, such as dyspnea, pulmonary rales, persistent tachycardia, often galloping. Optional heart murmur, if so, are often two, tricuspid regurgitation murmur (secondary to the left and right ventricular enlargement). Apex beat weak and dispersed, and extended to the lower left. Heart sound low blunt, can be bell