心肌型脂肪酸结合蛋白对心外科围术期心肌缺血与损伤的预测价值

目的 通过观察冠状动脉旁路移植术和室间隔缺损修补术围手术期不同时间人类心肌型脂肪酸结合蛋白(h-FABP)的动态变化,评价h-FABP在术中对心肌缺血及损伤的预测作用.方法 随机选取2008年2月至12月行冠状动脉旁路移植术和室间隔缺损修补术者各30例,分别于术前、主动脉夹闭时及主动脉开放后10 min、2 h.6 h、12 h、24 h取静脉血,检测h-FABP、缺血修饰白蛋白(IMA)、心肌肌钙蛋白I(cTnI)和肌酸激酶同工酶(CK-MB)的含量.结果 h-FABP与IMA变化趋势一致.h-FABP与cTnI和CK-MB变化趋势相似,但是h-FABP在心肌缺血与损伤后血中高峰时间出现得更早,维持时间较短,在2 h后即明显下降,24 h回复基线水平.经线性相关分析,冠状动脉旁路移植术组h-FABP的峰值与IMA、CK-MB和cTnI的峰值高度呈正相关(P<0.05),相关系数r分别为0.948、0.964和0.961.室间隔缺损修补术组有类似的结果,h-FABP的峰值与IMA、CK-MB和cTnI的峰值高度呈正相关(P<0.01),相关系数r分别为0.986、0.978和0.957.结论 h-FABP是心外科围手术期心肌缺血和损伤的早期诊断指标.h-FABP血中水平的定量监测可以有效地预测术中心肌缺血与损伤情况. Objective To evaluate the value of human fatty acid binding protein (h-FABP) in predicting myocardial ischemia and injury in the perioperative period of cardiac surgery, we observed the dynamic changes of h-FABP in perioperative period of patients underwent coronary artery bypass grafting and ventricular septal defects repairing surgery, and evaluated the relationship of h-FABP and ischemia modified albumin ( IMA), CK-MB, cTnI. Methods Patients underwent coronary artery bypass grafting (n =30) and ventrieular septal defect repairing (n = 30) surgery between February 2008 and December 2008 were included in this study. Venous blood sample was obtained at preoperative, aortic clamping, aortic unclamping of 10 rain, 2 h, 6 h, 12 h, 24 h for the measurements of h-FABP, IMA, cTnI and CKMB. Results h-FABP and IMA changed in the same way at various examined time points, h-FABP changes also paralleled cTnI and CK-MB changes, h-FABP peaked early during myocardial ischemia and injury and returned to baseline level at 2 h post myocardial ischemia and injury. Linear correlation analysis showed that the peak value of h-FABP was positively correlated with IMA, CK-MB and cTnI in both CABG group (r =0. 948, 0. 964 and 0. 961, P < 0. 05 ) and in the VSD group ( r = 0. 986, 0. 978 and 0. 957). Conclusions h-FABP is an early diagnostic parameter reflecting perioperative myocardial ischemia and injury in cardiac surgery. Quantitative h-FABP monitoring could predict the severity of myocardial ischemia and injury early during cardiac surgery.