老年人左心室舒张功能减退窦性心率振荡的研究

目的 探讨老年人左心室舒张功能减退患者窦性心率振荡(HRT)特点,评价HRT对左心室舒张功能减退患者危险分层评估的价值. 方法 选择左心室舒张功能减退患者40例作为观察组,其中左心房增大组20例,正常组20例;选择体检健康者20例作为时照组.分析TO、TS与Macruz指数、二尖瓣舒张早期血流速度峰/舒张晚期血流速度峰值(E/A)比值以及心率变异性(HRV)的相关性. 结果 观察组T0升高(P<0.05),TS下降(P<0.01);左心房增大组TO>左心房正常组(P<0.05),TS<左心房正常组(P<0.01);TO与Macroz指数呈正相关(P<0.01),与SDNN,SDANN呈负相关(均P<0.05);TS与Macruz指数呈负相关(P<0.05),与E/A、SDNN、SDANN呈正相关. 结论 HRT在预测老年人左心室舒张功能减退患者危险性方面具有一定价值.

Investigation on heart rate turbulence in patients with decreased left ventricular diastolic function

Objective To assess the characteristics of heart rate turbulencer (HRT) in elderly patients with decreased left ventricular diastolie function.Methods 40 patients were divided into two groups:20 patients with enlarged left atrium and 20 patients without enlarged left atrium.20 healthy people were selected as controls. Turbu1ence onset (TO) and turbulence slope (TS) were measured,and correlation was analyzed between TO,TS and the E/A,index of Macruz and heart rate variability (HRV).Results TO was higher (P<0.05) and TS was lower in patients (P<0.01),TO was higber in patients with enlarged left atrium than in with out enlarged lef atrium people (P<0.05) and TS was lower (P<0.01).TO was positively (P<0.01) and TS Was negatively (P<0.05),correlated with the index of Macruz.TO Was negatively (P<0.05) and TS was positively (P<0.05) related to SDNN and SDANN.Conclusion HRT can be used as a potential risk predictor in decreased left ventricular diastolic function patients.