慢性心力衰竭患者心率减速力检测的临床意义

The characteristics of deceleration capacity of rate in patients with chronic heart failure and its clinical significance

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 explore the characteristics of deceleration capacity of rate（DC） in patients with chronic heart failure and its clinical significance. Methods The DC was obtained from 50 survivors of chronic heart failure（CHF） in sinus rhythm and 35 who were without chronic heart failure as controls. DC was measured using digitized 24 hours Holter recording. Results DC value was significantly lower in patients with chronic heart failure than those without chronic heart failure controls（p0.001）. Conclusion DC value decreased in patients with chronic heart failure, whose decreased vagal activity after chronic heart failure results in reduced protection and increased risk of death.