Wang Jing, Wang Xinfang, Xie Mingxing, Yang Ya, L V Qing, Yang Ying, Wang Liangyu
Department of Diagnostic Ultrasound, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
J Huazhong Univ Sci Technolog Med Sci. 2005;25(1):94-6, 99. doi: 10.1007/BF02831398.
The optimal plane for measurement of the right ventricular (RV) volumes by real-time three-dimensional echocardiography (RT3DE) was determined and the feasibility and accuracy of RT3DE in studying RV systolic function was assessed. RV "Full volume" images were acquired by RT3DE in 22 healthy subjects. RV end-diastolic volumes (RVEDV) and end-systolic volumes (RVESV) were outlined using apical biplane, 4-plane, 8-plane, 16-plane offline separately. RVSV and RVEF were calculated. Meanwhile tricuspid annual systolic excursion (TASE) was measured by M-mode echo. LVSV was outlined by 2-D echo according to the biplane Simpson's rule. The results showed: (1) There was a good correlation between RVSV measured from series planes and LVSV from 2-D echo (r = 0.73; r = 0.69; r = 0.63; r = 0.66, P < O. 25-0. 0025); (2) There were significant differences between RVEDV in biplane and those in 4-, 8-, 16-plane (P < 0.001). There was also difference between RV volume in 4-plane and that in 8-plane (P < 0.05), but there was no significant difference between RV volume in 8-plane and that in 16-plane (P > 0.05); (3) Inter-observers and intro-observers variability analysis showed that there were close agreements and relations for RV volumes (r = 0.986, P < 0.001; r = 0.93, P < 0.001); (4) There was a significantly positive correlation of TASE to RVSV and RVEF from RT3DE (r = 0.83; r = 0.90). So RV volume measures with RT3DE are rapid, accurate and reproducible. In view of RV's complex shape, apical 8-plane method is better in clinical use. It may allow early detection of RV systolic function.
确定了实时三维超声心动图（RT3DE）测量右心室（RV）容积的最佳平面，并评估了RT3DE研究RV收缩功能的可行性和准确性。通过RT3DE采集了22名健康受试者的RV“全容积”图像。分别使用心尖双平面、四平面、八平面、十六平面离线勾勒出RV舒张末期容积（RVEDV）和收缩末期容积（RVESV）。计算RVSV和RVEF。同时，通过M型超声测量三尖瓣年度收缩期偏移（TASE）。根据双平面辛普森法则，用二维超声勾勒出LVSV。结果显示：（1）从系列平面测量的RVSV与二维超声测量的LVSV之间存在良好的相关性（r = 0.73；r = 0.69；r = 0.63；r = 0.66，P < 0.25 - 0.0025）；（2）双平面的RVEDV与四平面、八平面、十六平面的RVEDV之间存在显著差异（P < 0.001）。四平面的RV容积与八平面的RV容积之间也存在差异（P < 0.05），但八平面的RV容积与十六平面的RV容积之间无显著差异（P > 0.05）；（3）观察者间和观察者内变异性分析表明，RV容积存在密切的一致性和相关性（r = 0.986，P < 0.001；r = 0.93，P < 0.001）；（4）TASE与RT3DE测量的RVSV和RVEF之间存在显著正相关（r = 0.83；r = 0.90）。因此，RT3DE测量RV容积快速、准确且可重复。鉴于RV形状复杂，心尖八平面法在临床应用中更佳。它可能有助于早期检测RV收缩功能。
