高血压合并冠心病患者心率减速力与心率变异性的相关性

摘要

Objective:To explore the correlation betWeen deceleration capacity of heart rate (DC)and heart rate var-iability (HRV)in patients With essential hypertension (EH)complicated coronary heart disease (CHD).Methods:DC and HRV Were monitored in 81 patients With EH + CHD (EH + CHD group)and 80 healthy volunteers (healthy control group)respectively.Results:Compared With healthy control group,there Were significant decrease in DC [(11.99±4.93)ms vs.(6.62±1.83)ms],standard deviation of normal to normal RR intervals calculated o-ver the 24 h period [SDNN,(129.94±15.22)ms vs.(63.66±12.13)ms],root-mean square of differences be-tWeen successive normal to normal intervals [rMSSD,(55.52±9.03)ms vs.(28.25±8.81)ms]and adjacent nor-mal RR interval difference > 50ms stroke accounted for a percentage of 24h total RR interval [PNN50,(13.99± 5.63)% vs.(7.29±1.11)%]of HRV in EH + CHD group,P <0.05 all;Pearson correlation analysis indicated that DC Was positively correlatedWith SDNN,rMSSD and PNN50 in EH+CHD patients (r =0.571,0.662,0.763, P <0.05 all).Conclusion:There is positive correlation betWeen deceleration capacity of heart rate and heart rate variability in patients With hypertension complicated coronary heart disease,Which can be jointly used as evidence for diagnosis and treatment.%目的：探讨心率变异性（HRV）和心率减速力（DC）在高血压合并冠心病患者中的相关性。方法：选择81例高血压合并冠心病患者（研究组）和80例健康志愿者（健康对照组）为研究对象，分别监测 DC和 HRV。结果：与健康对照组比较，高血压合并冠心病患者DC [（11.99±4.93）ms 比（6.62±1.83）ms]及心率变异性的24h正常 R-R间期标准差[SDNN，（129.94±15.22）ms比（63.66±12.13）ms]、相邻正常 R-R间期差值的均方根[rMSSD，（55.52±9.03）ms比（28.25±8.81）ms]和相邻正常 R-R间期差值＞50ms的心搏数占24h总 R-R间期数的百分比[PNN50，（13.99±5.63）％比（7.29±1.11）％]明显降低，P 均＜0.05；Pearson相关分析显示，高血压合并冠心病患者中 DC 与 SDNN、rMSSD和 PNN50均呈正相关（r＝0.571、0.662、0.763，P 均＜0.05）。结论：高血压合并冠心病患者心率减速力与心率变异性呈正相关，可协同作为诊治依据。