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1.本文对100例成人正常心脏的二尖瓣的腱索和乳头肌作了观察,并对腱素的分类作了探讨.2.二尖瓣前叶具有Ⅰ、Ⅱ级腱索,Ⅰ级腱索为游离腱索,Ⅱ级腱索为粗糙带腱索和支持腱索.后叶具有Ⅰ、Ⅱ、Ⅲ级腱索,Ⅰ级腱索包括游离腱索和裂口腱索,Ⅱ级腱索即粗糙带腱索,Ⅲ级腱索为基底腱索.3.二尖瓣后叶腱索的数目多于前叶,而前叶腱索的长度和宽度均大于后叶.Ⅰ级腱索最细.Ⅱ级腱索中以止于前叶的支持腱索为最粗壮,其平均宽度为0.085±0.022cm.Ⅲ级腱索终于后叶的基底部或二尖瓣纤维环,其出现率占总数的90±5.77%.此外,后连合腱索的平均长度和宽度均大于前连合.4.前乳头肌的数目较少,平均为1.9±0.99, 而后乳头肌则较多,平均为2.56±0.99.在前、后乳头肌的周围常可见单独较小的乳头肌存在.
1. In this paper, we observed the mitral chordae tendineae and papillary muscle of 100 normal adult heart, and discussed the classification of tendon.2.Changes of Ⅰ, Ⅱ tendons in the anterior mitral valve, Ⅰ grade The chordae tendons are free chordae, the chordae chordae tendons are the rough chordae and the chordae tendinosus, the posterior lobe has the chondrocytes Ⅰ, Ⅱ and Ⅲ, the chordae Ⅰ including the free chordae and the chondral chordae, the grade Ⅱ chordae tendinosa That is rough with chordae tendinos, chordae tendinosus basal chordae tendinosus 3. Mitral valve posterior leaf chordae tendon number more than the anterior lobe, while the anterior chordae tendon length and width are greater than the posterior leaf .I grade chordae most Fine grade II tendons in the anterior lobe of the tendons to support the most sturdy, the average width of 0.085 ± 0.022cm class III tendon finally the posterior leaflet base or mitral annulus, the incidence rate accounted for 90 ± 5.77% of the total. In addition, the average length and width of the posterior commissure tendon were greater than the anterior commissure.4 The number of anterior papillary muscles was less, with an average of 1.9 ± 0.99, while the posterior papillary muscle was more, with an average of 2.56 ± 0.99. Anterior and posterior papillary muscles can often be seen around the smaller papillary muscle.