人心左室乳头肌形态和动脉供应

<正> 二尖瓣环、瓣叶、腱索和乳头肌组成的二尖瓣复合体,在防止血液返流方面起着重要作用。乳头肌作为复合体的主动部分,具有更重要的意义。乳头肌功能紊乱是产生病理性杂音的常见原因之一,由梗塞所造成的乳头肌断裂将导致更严重的后果。有关人心左室乳头肌血供的研究,国外有少量报导,国内仅北京医学院夏家骝等人进行了研究。基于其重要性,我们对人心左室乳头肌形态和动脉供应进行了研究。

MORPHOLOGY AND ARTERIAL SUPPLY OF THE PAPILLARY MUSCLES OF THE LEFT VENTRICLE OF MAN

This thesis is the study of the morphology and arterial supply of the papillary musclcs of the left ventricle of 104 human hearts. The maim me-thod used is angiography and corrosion. The commonest number of the anteri-or and posterior papillary muscles is one. In 72 hearts there are musculartrabeculae by which the papillary muscle is attached to the wall of the leftventricle. The projection of the auterior papillary muscle of the left ven-tricle on the heart surface lies most frequently on the middle third regionof a supposed "#"-form region. There are three types of attachment of thepapillary muscle: the free, the attached and the intermidiate, among whichthe largest number is the first type. The arteries supplying the anteriorpapillary muscle are the branches of the anterior descending artery, theleft circumflex artery or these two. Each of the three types amounts to30% or so; the posterior papillary muscle is mostly supplied by the leftventricular posterior branches of the right circumflex artery 9.6 % ). The blood vessels in the papillary muscle belong to class B, each of the papillarymuscles containing 1--3 major vessels measured 0. 1--1 mm in diameter.The three vascular distribution types in the papillary muscle are of axis,segment and mixtnre, and the axial type is most commonly seen of all. Thevascular distribution type j? of certain relation to the attachment type ofthe papillary muscle. The axial distribution is frequently found in the freetype of the papillary muscle. The arteries distributes on either side of thepapillary muscle.