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首页> 外文期刊>Journal of cardiothoracic and vascular anesthesia >Three-dimensional reconstructions of normal and aneurysmatic left ventricles in vivo using transesophageal echocardiography.
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Three-dimensional reconstructions of normal and aneurysmatic left ventricles in vivo using transesophageal echocardiography.

机译：使用食管超声心动图在体内对正常和动脉瘤性左心室进行三维重建。

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摘要

OBJECTIVE: To perform three-dimensional surface reconstructions to provide spatial delineations of a normal and an aneurysmatic left ventricle, using transesophageal echocardiography. DESIGN: Prospective study. SETTING: University hospital. PARTICIPANTS: Eight patients in cardiogenic shock admitted to the intensive care unit and two patients undergoing surgery with general anesthesia. INTERVENTIONS: Using a multiplane transesophageal echocardiography probe, nine echocardiographic cross-sectional images of the heart at approximately 20 degrees angular increments were obtained from midesophageal level in each patient for three-dimensional surface reconstructions. Multiple determinations of cardiac output using the thermodilution principle were also made in each patient to verify the accuracy of three-dimensional data sets. MEASUREMENTS AND MAIN RESULTS: End-diastolic and end-systolic volumes were determined from three-dimensional data sets using the disc-summation method. Stroke volume was derived as the difference between end-diastolic and end-systolic volumes. Stroke volume was also calculated from thermodilution cardiac output measurements and heart rate. Correlation and limits of agreement between stroke volumes derived by the two methods were determined. Three-dimensional wire-frame models of a normal and an aneurysmatic left ventricle at end-systole were constructed from the nine echocardiographic cross-sectional images. Correlation coefficient between stroke volume derived from three-dimensional data sets using the disc-summation method and that measured by the thermodilution method was 0.91 (p < 0.001). Wire-frame models reveal a normal symmetric cavity and an aneurysmal cavity in sharp relief. CONCLUSIONS: Three-dimensional surface reconstruction can be performed from multiple cross-sectional images obtained using an unmodified commercially available multiplane transesophageal echocardiography probe, to reveal the left ventricular cavity in sharp relief. High correlation between stroke volume calculated from three-dimensional data sets and that measured by the thermodilution method attests to the accuracy of the three-dimensional data sets.
机译：目的：采用食管超声心动图技术进行三维表面重建，以提供正常和动脉瘤性左心室的空间轮廓。设计：前瞻性研究。地点：大学医院。参与者：8例因心源性休克而入院的重症监护病房，2例接受全麻手术的患者。干预措施：使用多平面经食道超声心动图探头，从每名患者的食管中部水平获取大约20度角增量的九幅超声心动图横截面图像，以进行三维表面重建。每个患者还使用热稀释原理对心输出量进行了多次测定，以验证三维数据集的准确性。测量和主要结果：使用椎间盘求和法从三维数据集中确定舒张末期容积和收缩末期容积。中风量是舒张末期和收缩末期之间的差异。还根据热稀释心输出量和心率来计算中风量。确定了通过两种方法得出的笔划量之间的相关性和一致性极限。从九个超声心动图横截面图像构建了正常和收缩末期的动脉瘤性左心室的三维线框模型。使用圆盘求和法从三维数据集得出的笔划量与通过热稀释法测得的笔划量之间的相关系数是0.91（p <0.001）。线框模型揭示了正常对称的腔和动脉瘤腔，锐利的释放。结论：可以使用未经修改的市售多平面经食管超声心动图探头从获得的多个横截面图像中进行三维表面重建，以揭示左心室腔内明显的缓解。从三维数据集计算出的笔划量与通过热稀释法测得的笔划量之间的高度相关性证明了三维数据集的准确性。

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