Shperling I D
Arkh Patol. 1980;42(6):23-6.
Water tests on atrioventricular valves of 125 dead patients with cardiological diseases revealed in 2 of them (1.6%) sagging of mitral cusps in the direction of the left atrium. The valve insufficiency was caused by the rupture of chordal threads in rheumatic desorganization of the connective tissues, necrosis and sclerosis of the papillary muscles in ischemic heart disease. Histological examinations of 104 papillary muscles from 24 autopsy cases showed their frequent involvement, particularly in myocardial infarction of the left ventricle. Under these conditions, comparatively rare development of insufficiency of the atrioventricular valves is explained by their great reserve and compensatory capacities.
对125例死于心脏病的患者的房室瓣进行的水测试显示，其中2例（1.6%）二尖瓣尖向左心房方向下垂。瓣膜功能不全是由结缔组织风湿性破坏中的腱索断裂、缺血性心脏病中乳头肌的坏死和硬化引起的。对24例尸检病例的104块乳头肌进行的组织学检查表明，它们经常受累，尤其是在左心室心肌梗死中。在这些情况下，房室瓣功能不全相对少见的发生情况是由其巨大的储备和代偿能力所解释的。
