实时三维超声心动图评价肺动脉高压患者右心室整体和节段收缩功能

目的 应用实时三维超声心动图(real-time three-dimensional，RT-3DE)探讨肺动脉高压(pulmonary hypertension,PH)患者右心室整体和节段收缩功能的特征。方法 入选PH患者30例和健康对照者27例，采集心尖四腔观以右心室为主的全容积图像，使用TomTec软件定量分析获得右心室整体和流入道部、体部、流出道部3个节段的舒张末容积(EDV)、收缩末容积(ESV)、每博输出量(SV)和射血分数(EF),分析三维超声参数的组间差异及其与常规超声心动图参数的相关性。结果 PH组右心室整体及各节段局部EDV和ESV较正常对照组升高（均P＜0.05），右心室整体和节段EF较正常对照组降低(均P ＜0.05)。右心室流入道节段EDV、SV及EF显著高于流出道和体部（均P＜0.05)，右心室整体EF低于流入道节段而高于流出道和体部（均P ＜0.05)。PH组右心室整体和流入道节段EF与肺动脉收缩压及三尖瓣反流最大速度与肺动脉口血流时间速度积分比值呈显著负性相关（r= -0.611、-0.576，P＜0.001、P=0.001及r=-0.772、-0.721，P=0.002、P＜0.001）。结论PH患者右心室容积增大，右心室整体和节段收缩功能减退，右心室整体和节段收缩功能受损的程度与右心室后负荷增高程度密切相关。

Evaluation of global and regional right ventricular systolic function in patients with pulmonary hypertension by real-time three-dimensional echocardiography

Objective To evaluate right ventricular (RV) global and regional systolic function using real-time three-dimensional echocardiography (RT-3DE) in patients with pulmonary hypertension (PH).Methods Thirty patients with PH and 27 controls were studied.RT-3DE images were acquired on a Philipa iE33 system with an X3-1 probe,then analyzed with a new software(TomTec) to determine RV global and regional (inflow, body, outflow) end-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV) and ejection fraction (EF).The difference of RT-3DE parameters between the two groups,as well as the correlation between RT-3DE and routine echoeardiography parameters was analyzed.Results In patients with PH ,RV global and regional EDV and ESV were significantly higher than those in normal controls (all P ＜0.05); RV global and regional EF were significantly lower than those in normal controls (all P ＜0.05).In the PH group, RV inflow EDV,SV and EF were higher than that of RV body and outflow part (P ＜ 0.05) ;RV global EF was lower than that of RV inflow part and higher than that of RV body and outflow part.In the PH group, RV global and inflow EF correlated with pulmonary artery systolic pressure negatively (r = - 0.611, P ＜0.001 and r = - 0.576, P = 0.001 ,respectively) ,and with the ratio of peak velocity of tricuspid regurgitation over outflow time-velocity integral negatively (r = -0.772, P = 0.002and r = -0.721, P ＜0.001, respectively)Conclusions RV global and regional volume was enlarged and systolic function was impaired in patients with pulmonary hypertension.RV global and regional systolic function was changed in liner relationship with RV after-load.