Tanaka S, Lee H Y, Mizukami S, Nakatani T, Chung I H
Department of Anatomy, Faculty of Medicine, Kanazawa University, Japan.
Clin Anat. 1998;11(2):106-11. doi: 10.1002/(SICI)1098-2353(1998)11:2<106::AID-CA7>3.0.CO;2-S.
We describe herein a rare and hitherto not reported variation, found in a Japanese male cadaver, in which a posterior sinus node (SN) artery and an accessory atrioventricular node (AN) artery originate from a common trunk branching from the posterior segment of the circumflex artery. After arising in this manner, the posterior SN artery passed in a clockwise direction around the posterior, lateral, and finally anterior wall of the left atrium to the sinus venosus, giving off a branch to the SN from posteriorly. The accessory AN artery coursed in a counterclockwise direction on the posterior wall of the left atrium as far as the crux of the heart, where it bent anterosuperiorly and continued within the interatrial septum. It entered the AN from superiorly and, crossing deep to the principal AN artery, reached the inferior and superficial portion of this node. It could be considered that the accessory AN artery in this study is a modified version of arteries entering and coursing in the interatrial septum, as exemplified by Kugel's anastomotic artery.
我们在此描述在一名日本男性尸体中发现的一种罕见且此前未报道过的变异情况，即后窦房结（SN）动脉和一条房室结（AN）副动脉起源于一条从回旋动脉后段发出的共同主干。以这种方式发出后，后SN动脉沿顺时针方向绕过左心房后壁、侧壁，最终到达前壁至静脉窦，从后方发出一支至SN。AN副动脉在左心房后壁沿逆时针方向走行至心脏十字交叉处，在此处向前上方弯曲并在房间隔内延续。它从上方进入AN，在主AN动脉深面交叉后，到达该结的下方和浅部。可以认为本研究中的AN副动脉是进入并走行于房间隔的动脉的一种变异形式，如库格尔吻合动脉。
