目的 观察伊伐布雷定对冠状动脉粥样硬化性心脏病（CHD,以下简称：冠心病）合并心律失常患者心率变异性（HRV）的影响,及对心房颤动（AF）的防治效果。方法 本文为前瞻性研究,病例纳入时间为2021年1月—2023年1月,研究对象为焦作市第二人民医院收治的125例CHD合并心律失常患者,采用随机数字表法对入组患者进行分组,分别列为常规组（62例）和联合组（63例）,常规组予常规药物治疗,联合组在常规药物治疗基础上联合伊伐布雷定治疗,比较2组患者治疗前后的HRV指标、血管内皮功能指标、心功能指标改善情况、心房颤动发生率及用药安全性。结果 治疗后,联合组24 h窦性心律RR间期标准差为（88.25±10.36）ms,24 h相邻正常RR间期差值均方根为（50.25±10.61）ms,24 h相邻正常RR间期差值>50 ms百分比为（12.04±3.41）%,均高于常规组[（81.44±10.77）ms、（43.28±10.71）ms、（10.77±3.08）%],组间比较差异具有统计学意义（P<0.05）。治疗后,联合组的血流介导下血管扩张程度为（12.33±3.27）%,硝酸甘油介导下血管内皮舒张程度为（9.83±2.21）%,均高于常规组[（10.25±3.23）%、（8.14±2.03）%]。AF发生率为4.76%（3/63）,低于常规组16.13%（10/62）,差异具有统计学意义（P<0.05）。治疗后,联合组的左室射血分数为（55.35±10.27）%,高于常规组（48.45±10.61）%,左室舒张末期内径为（40.24±10.37）mm,左室后壁厚度为（9.22±2.06）mm,均低于常规组[（46.33±10.28）mm、（10.88±2.46）mm],差异具有统计学意义（P<0.05）。治疗后,联合组的药物相关不良反应发生率为7.94%（5/63）,略高于常规组6.45%（4/62）,组间比较差异无统计学意义（P>0.05）。结论 伊伐布雷定联合常规药物治疗CHD合并心律失常能有效改善患者HRV指标、血管内皮功能及心功能,降低AF发生率,且未增加药物不良反应发生风险。

Objective To observe the effect of ivabradine on heart rate variability（HRV）in coronary heart disease（CHD）patients with arrhythmia and its preventive and therapeutic effects on atrial fibrillation（AF）．Methods This is a prospective cohort study．The 125 CHD patients with arrhythmia were included from January 2021 to January 2023 and divided into the conventional group（62 cases）and the combined group（63 cases）by random number table．The conventional group was treated with conventional drugs,and the combined group was treated with ivabradine additionally．The HRV index,vascular endothelial function index,improvement of cardiac function indicators,incidence of AF and medication safety were compared．Results After treatment,the standard deviation of normal RR intervals in 24 h of the combination group was（88.25±10.36）ms,root mean square of successive RR interval differences in 24 h was（50.25±10.61）ms,and successive RR interval differences>50 ms was（12.04±3.41）%．Compared with the conventional group [（81.44±10.77）ms,（43.28±10.71）ms and（10.77±3.08）%],the above indicators were all higher（P<0.05）．After treatment,the flow-mediated dilation and nitrite-mediated dilation of the combination group were（12.33±3.27）% and（9.83±2.21）%,respectively．Compared with the conventional group（10.25±3.23）% and（8.14±2.03）%）,the above indicators were higher．The incidence of AF was 4.76%（3/63）,which was lower（P<0.05）than the conventional group of 16.13%（10/62）．After treatment,the left ventricular ejection fraction of the combination group was（55.35±10.27）%,which was higher than that of the conventional group（48.45±10.61）%．The left ventricular diastolic diameter was（40.24±10.37）mm and the left ventricular posterior wall thickness was（9.22±2.06）mm．Compared with the conventional group [（46.33±10.28）mm,（10.88±2.46）mm],the above indicators were all lower（P<0.05）．After treatment,the incidence of drug-related side effects in the combination group was 7.94%（5/63）,which was similar to 6.45%（4/62）in the conventional group（P>0.05）．Conclusions The combination of ivabradine and conventional drugs in the treatment of CHD complicated with arrhythmia can effectively improve HRV indicators in patients,promote the recovery of vascular endothelial cell function and cardiac function,reduce the incidence of AF,and do not significantly increase the risk of drug side effects．

术后谵妄(POD)指术后严重的注意力及神经认知障碍,其发病率高,且可致多种术后并发症的发生率增加,老年患者为其高危人群之一。相关研究显示:心率变异性(HRV)作为反映自主神经系统(ANS)功能的生物电指标,与老年患者POD的发生相关。本文综述了近年HRV指数与老年患者POD关系的研究,描述了老年患者POD的流行病学规律、ANS功能异常引发POD的可能机制以及HRV与神经认知功能及POD的可能联系,以期为POD的防治提供新的思路。

Postoperative delirium (POD) is a syndrome of severe postoperative attention and neurocognitive impairment, which has a high incidence and can lead to an increased incidence of various postoperative complications. Elderly patients are one of the high-risk groups for POD. Relevant studies have shown that heart rate variability (HRV), as a bioelectrical indicator reflecting the function of the autonomic nervous system (ANS), is associated with the occurrence of POD in elderly patients. This paper reviewed the recent studies on the relationship between HRV index and POD in elderly patients, described the epidemiological regularity of POD in elderly patients, the possible mechanism of POD caused by abnormal ANS function, and the possible connection between HRV and neurocognitive function or POD, in order to provide new evidence for the prevention and treatment of POD.