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目的:应用超声心动图三维斑点追踪显像(three-dimensional speckle tracking imaging，3D-STI)技术定量评价肥厚型心肌病(hypertrophic cardiomyopathy，HCM)患者左室心肌应变、三维扭转运动等力学变化，并分析左室扭转与左室形态及整体收缩功能之间的相关性。方法:选取2017年9月至2019年6月就诊于宁夏医科大学总医院的45例宁夏地区成人HCM患者为HCM组，另选性别、年龄相匹配的50例健康志愿者为对照组。常规经胸二维超声心动图测量左房前后径(LAD)、室间隔舒张末期厚度(IVSD)、左室后壁舒张末期厚度(LVPWD)，计算左室质量指数(LVMI)、二尖瓣舒张期血流频谱E峰、A峰以及E、A比值；经胸三维超声心动图测量左室舒张末期容积(EDV)、左室收缩末期容积(ESV)、左室射血分数(LVEF)，计算每搏量(SV)等；应用X5-1矩阵探头获取左室三维全容积动态图像，运用脱机软件TomTec 4D LV-Analysis 3.0获得左心室整体应变参数和三维扭转运动力学参数：整体纵向应变(GLS)、整体圆周应变(GCS)、整体径向应变(GRS)、整体面积应变(GAS)、基底段旋转角度(Rotation-basal)、左心室心尖段旋转角度(Rotation-apical)、左心室扭转角度(Twist)、左心室扭力(Torsion)。比较两组之间上述各参数的差异。将Rotation-basal、Rotation-apical、Twist、Torsion分别与IVSD、LVMI和LVEF进行相关性分析。结果:与对照组相比，HCM组LAD、IVSD、LVPWD及LVMI明显增大(均n P0.05)。n 结论:①3D-STI能够早期发现HCM患者左室三维收缩应变的细微变化；②HCM患者左室三维空间扭转运动明显增强；③随着IVSD增加，HCM患者左室Rotation-apical、Twist、Torsion明显减低，而LVMI和LVEF与Rotation-basal，Rotation-apical、Twist、Torsion无明显相关性。“,”Objective:To evaluate the changes of left ventricular (LV) myocardial systolic strain and twist motion including global longitudinal strain(GLS), global circumferential strain(GCS), global radial strain(GRS), global area strain(GAS), LV basal segment rotation angle (Rotation-basal), LV apical segment rotation angle (Rotation-apical), LV twist angle (Twist), LV torsion(Torsion) by three-dimensional speckle tracking imaging(3D-STI) in adult patients with hypertrophic cardiomyopathy (HCM), and further to analyze the correlations between LV twist and its morphology and global systolic function.Methods:A total of 45 patients with HCM from the General Hospital of Ningxia Medical University from September 2017 to June 2019 were enrolled. In addition, 50 healthy subjects were recruited as a control group. Left atrial dimension(LAD), interventricular septal end-diastole dimension(IVSD), LV posterior wall end-diastole dimension (LVPWD), LV mass index(LVMI) and other parameters were respectively measured by conventional two-dimensional transthoracic echocardiography. LV end-diastole volume(EDV), LV end-systole volume(ESV), calculated stroke volume(SV) and LV ejection fraction (LVEF) were respectively measured by 3D transthoracic echocardiography. Full-volume 3D dynamic images were performed using matrix transducer X5-1. LV Rotation-basal, Rotation-apical, Twist and Torsion, GLS, GCS, GRS and GAS were respectively analyzed by off-line TomTec software. The differences of those parameters between the two groups were compared. The correlations between 3D-Torsion parameters and those parameters by two-dimensional echocardiography was further analyzed.Results:Compared with control group, LAD, IVSD, LVPWD and LVMI of HCM group were increased(all n P0.05), but negatively correlated with Rotation-apical, Twist and Torsion (n r=-0.327, -0.439, -0.374; all n P0.05).n Conclusions:①3D-STI can detect the earlier subtle changes of left ventricular three-dimensional systolic strain in HCM patients; ②LV three-dimensional Twist inereases considerably in HCM patients; ③LV Twist, Torsion and Rotation-apical are significantly decreased with the increase of IVSD in HCM patients; However, LVEF and LVMI are not significantly correlated with Rotation-basal, Rotation-apical, Twist and Torsion.