体外循环对于冠状动脉旁路移植术患者心率变异的影响

目的：探讨在体外循环下和非体外循环下行冠状动脉旁路移植术（CABG）患者术后早期心率变异（HRV）变化差异的临床意义。方法：在体外循环下行CABG20例（实验组），非体外循环下行CABG20例（对照组）。2组患者在术前和术中各方面参数的控制基本一致。通过Hoher监测评价HRV指标的变化。结果：术后在HRV时域分析中．对照组指标均在正常参考范围，实验组均明显低于正常参考范围。结论：在CABG患者的手术治疗中。体外循环对于患者的植物神经系统功能和心功能有着较大的影响。

Study on the Effect of Extracorporeal Circulation on Heart Rate Variability in Coronary Artery Bypass Grafting Patients

Objective: To discuss the value of heart rate variability (HRV) in postoperative patients undergoing coronary artery bypass grafting (CABG) with or without extracorporeal circulation. Methods: Forty patients undergoing CABG were randomly divided into oberserved group (with extracorporeal circulation, n = 20) and control group (without extracorporeal circulation, n = 20). The preoperative and operative parameters were almost the same in two groups. HRV was evaluated by Holter monitoring. Results: In the postoperative time domain analysis of HRV, the values of all HRV parameters were in the normal range in control group and significantly lower than normal range in extracorporeal circulation group. Conclusion: The extracorporeal circulation can significantly affect the function of heart and antagonistic system in CABG patients.