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目的观察慢性心力衰竭患者心率减速力的变化,探讨其临床意义。方法选择50例慢性心衰患者(心衰组)和35例非器质性心脏病患者(对照组)接受24h动态心电图检查,应用心率减速力(DC)处理软件,离线计算DC值,比较两组的差异。结果心衰组患者的DC值明显低于对照组,有统计学差异(p<0.001)。结论慢性心衰患者存在迷走神经功能受损,导致其保护作用下降,猝死危险性增加。DC检测技术是猝死高危人群筛选与预警的一项新的无创心电技术,值得临床应用推广。
Objective To observe the changes of heart rate deceleration in patients with chronic heart failure and to explore its clinical significance. Methods Fifty patients with chronic heart failure (HF) and 35 non-organic heart disease patients (control group) underwent 24h Holter monitoring. DC software was used to calculate DC value offline. Group differences. Results The DC value of heart failure patients was significantly lower than that of the control group (p <0.001). Conclusion Patients with chronic heart failure have impaired vagal function, resulting in a decrease in their protective effect and an increased risk of sudden death. DC detection technology is a new noninvasive ECG technique for screening and early warning of high risk population of sudden death, which is worthy of clinical application.