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目的应用经胸实时三维超声心动图定量分析二尖瓣几何结构,探讨二尖瓣脱垂对患者瓣叶及瓣环结构和功能的影响。方法对30例二尖瓣脱垂患者(脱垂组)及30例正常人(对照组)分别行经胸实时三维超声心动图检査,并使用MVA后处理软件脱机分析二尖瓣环及瓣叶的各个参数。结果脱垂组瓣环前后径、前外后内径、周长、面积、高度、连合处直径、前叶面积、后叶面积、前叶长度、后叶长度明显大于对照组,后叶角度明显小于对照组,球度指数、非平面角度、幕状区高度、幕状区容积、幕状区面积、瓣环最大位移、瓣环位移最大速率、瓣环面积分数与对照组比较无明显差异。结论二尖瓣脱垂可导致患者瓣环及瓣叶的几何结构发生一定变化,但对瓣环的动态形变功能影响较小。
Objective To quantitatively analyze the mitral valve geometry using transthoracic real-time three-dimensional echocardiography to investigate the effect of mitral valve prolapse on the structure and function of valve leaflets and annulus. Methods Thirty patients with mitral valve prolapse (prolapse group) and 30 healthy individuals (control group) underwent real-time three-dimensional echocardiography by transthoracic echocardiography. MVA postprocessing software was used to analyze mitral valve annulus and flap Leaf of the various parameters. Results The prolactoid diameter, anterior posterior diameter, circumference, area, height, commissure diameter, anterior leaf area, posterior leaf area, anterior leaf length and posterior leaf length of the prolapse group were significantly larger than those of the control group Sphericity index, non-planar angle, height of curtain, volume of curtain, volume of curtain, maximum displacement of annulus, maximal rate of annulus displacement and annulus area were not significantly different from those in control group. Conclusions Mitral valve prolapse can cause some changes in the geometric structure of the valve annulus and valve leaflets, but has little effect on the dynamic deformability of the annulus.