论文部分内容阅读
目的：应用多平面经食管体元模型动态三维超声重建及三维提取技术评价正常人和二尖瓣脱垂者二尖瓣环的立体形态，为二尖瓣环成形术的合理设计提供依据。方法：研究对象包括１９例正常人和２１例经手术证实的二尖瓣脱垂伴关闭不全患者。结果与结论：无论正常人和二尖瓣脱垂者，其瓣环在收缩期均为一非平面的“马鞍”形，前后侧较高，左右交界侧较低。正常组二尖瓣环前、后叶间夹角（ａ）为１４５．８９±１３．１８度，脱垂组１４５．１２±１５．７９度；正常组后叶侧置于零度位时前叶顶部与底边的高度（ｂ）为１．２７±０．４１ｃｍ，脱垂组为１．３０±０．２６ｃｍ；正常组前后叶侧顶点连线至内外交界连线的距离（ｃ）为１．０８±０．２４ｃｍ，脱垂组为１．１０±０．１９ｃｍ。正常组和二尖瓣脱垂组ａ、ｂ、ｃ差别无显著意义（Ｐ＞０．０５。
OBJECTIVE: To evaluate the stereoscopic morphology of mitral annulus in patients with normal and mitral valve prolapse using dynamic three-dimensional reconstruction and three-dimensional extraction of multiplane transesophageal voxel model to provide a basis for rational design of mitral annuloplasty. Methods: The study included 19 normal subjects and 21 surgically confirmed patients with mitral valve prolapse and insufficiency. RESULTS AND CONCLUSION: In both normal and mitral valve prolapse patients, the annulus had a non-planar “saddle” shape during systole. The anterior and posterior sides were higher and the left and right sides were lower. In the normal group, the angle between the anterior and posterior lobes of the mitral valve annulus (a) was 145.89 ± 13.18 degrees and the prolapse group was 145.12 ± 15.79 degrees; The height (b) of the top and bottom was 1.27 ± 0.41 cm and the height of the prolapsed group was 1.30 ± 0.26 cm. The distance (c) between the top and bottom border of the normal group was 1 .08 ± 0.24cm, prolapse group was 1.10 ± 0.19cm. There was no significant difference in a, b, c between normal group and mitral valve prolapse group (P> 0.05).