家兔心脏大血管根部血液供给的心外来源及其与冠状动脉间的吻合

THE EXTRACARDIAC ORIGINS OF THE BLOOD VESSELS SUPPLYING THE ROOTS OF THE LARGE VESSELS OF THE RABBIT HEART

心脏冠状动脉循环障碍是常见的心脏病之一。为了改善冠状动脉的循环状况,临床上除了内科疗法外,还有各种外科手术疗法,其中最简而易行的是双侧胸廓内动脉切断术。该手术于1939年由意大利人Fieschi初次提出.

The distribution of the extracardiac arteries to the roots of the large vessels of theheart was examined in 40 rabbits.In 31 of them,branches were found beneath the epi-cardium.Most of them were"vasa vasorum"in nature.But in two cases,it was ofremarkably large size.It entered the heart along the root of the right anterior venacava,and extended to the lateral wall of the right atrium.The branches of the extracardiac arteries for the root of the right anterior vena cavaarose frequently from the A.intercostalis suprema dextra and A.bronchialis dextra,thosefor the left anterior vena cava arose from the A.pericardiaco-phrenica sinistra,those forthe ascending aorta from the A.thymica,and those for the pulmonary artery from theAA.intercostales or A.thymica...etc.The anastomoses between the extracardaic branches and the branches of coronaryarteries were found in two forms,i.e.end to end anastomoses and network anastomoses.Individual variations of the branches concerned were observed.The a.pericardiaco-phrenica of the rabbit arose from the A.thoracica interna(right-40%,left-70%),the A.intercostalis suprema(right-40%,left-20%),the A.intercostalis posterior(right-10%,left-5%),the A.bronchialis(right-10%),etc.The above findings may be useful for further investigations on collateral circulationafter the ligation of the A.thoracica interna.