实时三维超声心动图对扩张型心肌病右心室整体收缩功能的评价

目的：应用实时三维超声心动图（RT-3DE）技术评价扩张型心肌病（DCM）患者右心室整体容积及收缩功能。方法：51例经临床诊断证实的DCM患者，经二维超声（2DE）筛选出DCM1组（右心室内径正常者）41例和DCM2组（右心室扩大者）10例，36例年龄相匹配的健康志愿者为对照组，均行三维容积成像并应用四维右室功能（4D-RVF）分析软件计算右室整体舒张末期容积（RVEDV）、收缩末期容积（RVESV）及射血分数（RVEF），分别进行各组间比较。结果：DCM组与正常对照组比较：前者RVEDV、RVESV均显著增高，而RVEF值则显著降低（P值均〈0．001）。DCM两纽间比较：DCM1组RVEDV及RVESV显著低于DCM2组（P值均〈0．05），但RVEF两组间无显著差异（P=0．31）。结论：DCM患者即使2DE检查右室内径正常，其容积与正常比较也已增大，甚至右室功能已明显减退。运用4D-RVF能准确评估右室功能，方法简便、易行。

Evaluation of Global Right Ventricular Systolic Function in Patients with Dilated Cardiomyopathy by Real-time Three-dimensional Echocardiography

Objective:To evaluate the global right ventricular volume and systolic function in patients with dilated cardiomyopathy(DCM) using real-time three-dimensional echocardiography(RT-3DE).Methods:Two-dimensional echocardiography(2DE) examinations were performed initially in 51 patients of DCM verified by clinical diagnosis and 36 healthy individuals(normal control group).Forty-one patients with normal size of right ventricle(RV) and remaining 10 with enlarged RV were divided into DCM group 1 and DCM group 2.RT-...