ABSTRACT
Objective To study the protective effect of Shenmai injection on myocardial ischemia reperfusion injury in patients underwent thoracoscopic cardiac surgery during cardiopulmonary bypass (CPB). Methods 18 patients with congenital heart disease with CPB thoracoscopic cardiac surgery were randomly divided into two groups (9 cases in each group): controlled group and experimental group. The controlled group did not give any intervened drugs, and the experimental group gave the injection of Shenmai that were added into heart cold cardioplegia (2 ml/kg). The levels of the following indexes in the serum were respectively measured just after the time of induction of anesthesia (T1) and heart resuscitation (T2): Troponin T (cTnT), Creatine kinase isoenzyme (CK-MB) quality, myoglobin (Mb). And at the same time, the left ventricular ejection fraction (EF) was measured. Results The concentrations of cTnT, CK-MB and mb in the serum of both groups just after the time of heart resuscitation (T2) were significantly increased more than just after the time of induction of anesthesia (T1) (P < 0.05). But the concentrations of cTnT, CK-MB and Mb in the experimental group were significantly lower than that in the controlled group just after the time of cardiac resuscitation. And EF was significantly higher than the controlled group (P < 0.05). Conclusion Shenmai injection can protect the myocardium from ischemia-reperfusion injury in patients underwent thoracoscopic cardiac surgery during cardiopulmonary bypass (CPB).