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目的探讨心肌肌钙蛋白(CTnI)在婴幼儿心力衰竭中的变化及临床意义。方法对38例心力衰竭患儿与26例同期住院无心肌损伤及心脏病患儿进行CTnI及肌酸激酶同功酶(CK-MB)检测,同时比较心力衰竭患儿病情稳定前后CTnI及CK-MB的变化。结果与对照组相比,心衰组血清CTnI浓度显著增高(P<0.01),而CK-MB浓度差异无统计学意义;心衰组病情稳定前后CTnI浓度比较差异有统计学意义(P<0.01),而CK-MB无统计学意义。结论CTnI在评价心肌损伤方面敏感性及特异性均优于CK-MB,可在亚细胞水平上诊断心衰提供一项生化指标。CTnI的动态变化可能有助于判断心衰的病情演变。
Objective To investigate the changes of cardiac troponin (CTnI) in infants with heart failure and its clinical significance. Methods CTnI and CK-MB were detected in 38 children with heart failure and 26 children without cardiac injury and heart disease during the same period. The CTnI and CK- MB changes. Results Compared with the control group, the serum CTnI concentration in heart failure group was significantly increased (P <0.01), while there was no significant difference in CK-MB concentration; the CTnI concentration in heart failure group before and after stable treatment was significantly different (P <0.01 ), While CK-MB had no statistical significance. Conclusions CTnI is superior to CK-MB in the evaluation of myocardial injury. It can provide a biochemical marker for the diagnosis of heart failure at the subcellular level. The dynamic changes in CTnI may help determine the evolution of heart failure.