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诸如心得安这类β-阻滞药物在治疗缺血性心脏病中的有益作用已被肯定,它能降低心肌收缩力、心率和心肌氧需要量,从而防止或延缓心肌缺血的发生。心得安直接降低心脏交感神经张力、延长房室结的传导性和反拗性,因而能防治手术时及手术后期的心律失常、高血压。本文研究目的是观察心得安是否能有效地降低施行冠状动脉旁路术的稳定型心绞痛病人麻醉手术期间的心肌氧需量,探讨其对术后高血压、房性和室性心律失常发病率的影响。资料和方法:50例施行冠状动脉旁路术的不
The beneficial effects of beta-blockers such as propranolol in the treatment of ischemic heart disease have been affirmed, it can reduce myocardial contractility, heart rate and myocardial oxygen demand, thereby preventing or delaying the occurrence of myocardial ischemia. Peace of mind directly reduce the sympathetic tone of the heart to extend the conduction and arcuate atrioventricular node, which can prevent surgery and postoperative arrhythmia, hypertension. The purpose of this study was to investigate whether propranolol can effectively reduce myocardial oxygen demand during anesthesia in patients with stable angina undergoing coronary artery bypass grafting and to investigate its effect on the incidence of postoperative hypertension, atrial and ventricular arrhythmia . Materials and Methods: 50 cases of coronary artery bypass surgery do not