家兔右心室壁微血管的三维构筑

THREE-DIMENSIONAL ARCHITECTURE OF MICROVASCULATURE OF THE RABBIT RIGHT VENTRICLE

本研究应用血管铸型法及扫描电镜技术,对家兔右心室壁的微血管构筑进行了观察。在心内膜面,观察到一层纤细而稀疏的毛细血管网——内皮下毛细血管网,由穿经心肌层的微动脉分支形成。在心肌层,微动脉及其分支分布于一定区域,微动脉起始处可见明显的括约肌。右室乳头肌的毛细血管与肌束平行,较左心室稀疏。室壁静脉构筑与左室相似,亦见到毛细血管后微静脉以萝卜根样形式汇入微静脉。右心室壁未见到动静脉吻合,但观察到与心腔直接相通的心最小静脉和心肌窦状隙。

The microvasculature of the rabbit right ventricle was studied by the method of vascular corrosion cast and scanning electron microscopy. In the endocardium could be seen thin and sparse capillary network i. e. subendothelial capillary network formed by the branches of the arterioles passing through myocardium. In the myocardium, arteriole and its branches distributed in certain area. Sphincters could be seen in the beginning of the arterioles. Capillaries of the papillary muscle in right ventricle were parallel to muscle bundle and were thinner and sparser than those of the papillary muscle in left ventricle. Venous system in right ventricle wall was similar in architecture to that in left ventricle, postcapillary venule joined its corresponding venule in a 'turnip root' like pattern. No A-V anastomosis could be seen, yet thebesian vessels and myocardial sinusoids directly opened into ventrical chamber could be found.