Objective The significance of dynamic three-dimensional reconstruction of echocardiography(3DRE) for mitral valvular prolapse(MVP) was evaluated.Methods Twenty patients with MVP including 13 men and 7 women (aged 13～56 years) were studied by dynamic 3DRE.The prolapsed mitral valves and their tendinous chordae were viewed. The ranges of valvular prolapse were measured.Results The surfaces of the prolapsed mitral valves showed rough and accompanied with abnormal tendinous chordae , and their bodies projected into left atrium during systole. The degree of valvular regurgitation was not related with the range of prolapse and was related with the severity of tendinous chorda injury.Conclusions The statns of prolapse could be showed objectively by dynamic 3DRE of MVP, which has obvious clinic significance.%目的评价动态三维超声重建对二尖瓣脱垂的意义。方法应用动态三维超声重建对20例二尖瓣脱垂患者进行研究，其中男性13例，女性7例，年龄15～56岁。观察脱垂的二尖瓣瓣膜与腱索，测量瓣膜脱垂的范围。结果收缩期脱垂的二尖瓣表面粗糙并向左房膨出，可伴有腱索异常。瓣膜反流的程度与脱垂范围的大小无正相关，与腱索损害的严重性有关。结论应用动态三维超声重建二尖瓣脱垂能较客观地反映脱垂的情况，有明显的临床意义。
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