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临床上常以血清肌酸激酶同工酶 (ＣＫ ＭＢ)异常增高作为诊断心肌炎的一个主要指标 ,但在急性呼吸道感染病例中常见血清ＣＫ ＭＢ增高 ,而无心肌损伤的临床症状和心电图改变的病例 ,是否确实有心肌损伤很难肯定。近年来报道心肌肌钙蛋白Ｉ(ｃＴｎＩ)对判断心肌损伤更具有特异性
Clinically, serum creatine kinase MB (CK MB) is commonly used as a predictor of myocarditis. However, CK MB is increased in patients with acute respiratory infections but not in clinical symptoms and electrocardiographic changes , It is difficult to determine whether there is indeed myocardial injury. It has been reported in recent years that cardiac troponin I (cTnI) is more specific for judging myocardial injury