二尖瓣关闭不全以风湿性为多见,但由于社会经济状况的提高,积极开展风湿热的防治工作,其发病率较前有显著下降。我院风湿性心脏病近30余年来已有所减少,风湿性心脏病住院病人在各种心脏病中所占的比例已从50年代的第一位(约占50%左右)降为第二位(约占20%左右)。由于功能解剖学研究的进展,认为二尖瓣装置(二尖瓣叶、瓣环、腱索、乳头肌、心房及心室)6个部分,其中任何一部分发生功能性或解剖的异常都可以导致二尖瓣关闭不全。由于心脏外科的进展,对二尖瓣解剖及二尖瓣疾病的概念,近10余午已有了新的认识。过去认为二尖瓣疾病 Rheumatic mitral regurgitation is more common, but due to the improvement of socio-economic conditions, and actively carry out the prevention and treatment of rheumatic fever, its incidence was significantly lower than the previous. Our hospital rheumatic heart disease has been reduced over the past 30 years, the proportion of rheumatic heart disease inpatient heart disease in the various from the first 50 (about 50%) dropped to second Bit (about 20% or so). Due to the advances in functional anatomy, it is considered that the functional or anatomical abnormalities of mitral valve devices (mitral valve leaflets, annulus, chordae, papillary muscle, atrium and ventricle) Mitral regurgitation. Due to the progress of cardiac surgery, mitral valve anatomy and the concept of mitral valve disease, nearly 10 more have been a new understanding. In the past that mitral valve disease