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目的 探讨实时三维超声心动图 (RT 3DE)测量左心室容积及其收缩功能的方法及可行性。方法 健康志愿者 37例 ,应用矩阵换能器和实时三维成像软件采集三维图像 ,利用TomTec 4DCardio ViewRT 1 .0软件测量左室舒张末期容积 (LVEDV)和收缩末期容积 (LVESV) ,进而计算出左室射血分数 (LVEF)。同时应用二维超声心动图 (2DE)双平面Simpson′s法和M型超声心动图Teichholz法分别测量LVEF值。结果 通过RT 3DE重建的左室三维图像结构完整 ,采集时间短 ,内膜清楚可辨 ;3种方法的各项测值之间差异无显著性意义 (P >0 .0 5)。RT 3DE测定的LVEF值与 2DE测值有很好的相关性 (r =0 .934 2 ,P <0 .0 0 1 ) ,与M型超声相比虽有相关性 ,但不如前二者显著 (r =0 .8695 ,P <0 .0 5)。结论 实时三维超声心动图作为一种无创的新技术通过全容积成像方式可以快捷地从各方位清晰显示心脏立体结构 ,检测左室容积及其收缩功能 ,方法准确可行 ,有利于临床推广应用
Objective To explore the feasibility and feasibility of real-time three-dimensional echocardiography (RT 3DE) in measuring left ventricular volume and systolic function. Methods Thirty-seven healthy volunteers were enrolled in this study. Three-dimensional images were acquired by matrix transducer and real-time three-dimensional imaging software. Left ventricular end diastolic volume (LVEDV) and end-systolic volume (LVESV) were measured by TomTec 4DCardio ViewRT 1.0 software. Room ejection fraction (LVEF). At the same time, LVEF values were measured respectively by two-dimensional echocardiography (2DE) Simpson’s method and M-mode echocardiography Teichholz method. Results The three-dimensional images of left ventricle reconstructed by RT-3DE were complete in structure, with short acquisition time and clear intima. The differences between the three methods were not statistically significant (P> 0.05). There was a good correlation between LVEF and 2DE measured by RT-3DE (r = 0. 934 2, P <0.001), which was not as significant as M-mode ultrasound (r = 0.8695, P <0.05). Conclusion Real-time three-dimensional echocardiography as a noninvasive new technology can quickly and clearly display the three-dimensional structure of the heart and measure the left ventricular volume and systolic function through full-volume imaging. The method is accurate and feasible, which is beneficial to the clinical application