慢性肺动脉高压患者右心房容积和功能及其影响因素的研究

目的 探讨慢性肺动脉高压(PH)患者右心房容积和功能改变及其主要影响因素.方法 慢性PH患者57例,分为轻度PH组、中度PH组、重度PH组.20例健康者为对照组.测量并计算右房最大容积指数(VmaxI)、右房最小容积指数(VminI)、心房收缩前右房容积指数(VpreI)、右房储器容积指数(RVI)、右房管道容积指数(CVI)、右房收缩腔容积指数(CCVI);测量三尖瓣瓣口直径,结合三尖瓣A峰峰值速度(Va),计算右房射血力(RAEF);测量右房侧壁收缩期、舒张早期、舒张晚期应变率(RASRs、RASRe、RASRa).分析肺动脉收缩压(PASP)、右室射血分数(RVEF)和右室侧壁组织多普勒频谱E峰与A峰比值(Ea/Aa)与右房各参数的相关性,及影响右房容积和功能的主要因素.结果 随着PASP的增高,右房容积变化明显,RVI、RASRs、CCVI、RAEF及RASRa的绝对值呈增高趋势,CVI呈减低趋势.PASP、RVEF和Ea/Aa与右房各参数具有相关性.EDVI、Ea/Aa及病程是影响VpreI的主要因素,VpreI及PASP是影响RAEF的主要因素.结论 慢性PH患者的右房容积及功能均有改变,PASP、RVEF和Ea/Aa等对右房容积、功能参数有不同影响.

Study of the shape and function of right atrium in patients with chronic pulmonary hypertension and the influencing factors

Objective To assess the volume and function of right atrium(RA) in patients with chronic pulmonary hypertension(PH) by echocardiography and explore the influencing factors of these changes.Methods The study include 20 healthy participants as the control group and 57 patients with chronic PH as the case group.The patients were divided into three groups: low-grade PH, midrange PH and severe PH.Maximal RA volume index(VmaxI), minimal RA volume index(VminI), pre-atrial contraction RA volume index( VpreI), reservoir volume index(RVI), conduit volume index(CVI), contraction-chamber volume index (CCVI) were measured and calculated.The diameter of tricuspid valve and the late-diastole peak velocity of the bloodstream(Va) were measured,and then RA ejection force(RAEF) could be calculated.Systolic strain rate(RASRs), early diastolic strain rate (RASRe), and late diastolic strain rate (RASRa) of RA free wall were measured respectively.The correlation between pulmonary arterial systolic pressure (PASP), right ventricular ejection fraction(RVEF),the tissue Doppler of RV free wall(Ea/Aa) and the parameters of RA were analysed,and the main factors influencing the volume and function of RA were exploxed.Results With the rising of PASP, the RA volume changed obviously.And CCVI, RAEF, RVI, RASRs and the absolute value of RASRa increased gradually, but CVI decreased gradually.PASP, RVEF and Ea/Aa correlated with the parameters of RA.The main factors influencing the Vprel were EDVI, Ea/Aa and the course of disease,and VpreI and PASP mainly influenced the RAEF.Conclusions In patients with chronic PH the volume and function of RA changed,and some index of which was infuenced by PASP, RVEF, Ea/Aa and so on.