Steding G, Xu J W, Seidl W, Männer J, Xia H
Abteilung Embryologie, Göttingen University, Federal Republic of Germany.
Anat Embryol (Berl). 1990;181(5):469-75. doi: 10.1007/BF02433794.
In 32 human embryos from 5 to 27 mm of length, stages 13 to 23 (according to the Carnegie system of stages), the contributions of the sinus venosus septum and the right sinus valve of the right atrium to the formation of the Eustachian and Thebesian valve were examined by scanning electron microscopy. The sinus septum takes part in the subdivision of the right sinus valve into the Eustachian and the Thebesian valves. From its first origin the sinus septum forms a septal structure between the orifices of the right hepatic vein (hepatic portion of the inferior caval vein), the precursor of the inferior caval vein, and the left horn of the sinus venosus, the precursor of the coronary sinus. Before the incorporation of the sinus venosus into the right atrium, it has an intra-sinusal position, and extends between the bases of the left and the right sinus valve. During the incorporation of the sinus venosus into the right atrium the sinus septum receives an intra-atrial position, and its positional relationships to the sinus valves and the orifices of the corresponding veins remain unchanged in principle. Due to the connection between the sinus septum and the right sinus valve, after completion of the incorporation of the sinus, the superior portion of the right sinus valve branches y-like into a lateral limb, (i.e. its original inferior portion) and into a medial limb, (i.e. the sinus septum).(ABSTRACT TRUNCATED AT 250 WORDS)
在32个长度为5至27毫米的人类胚胎中，处于13至23期（根据卡内基分期系统），通过扫描电子显微镜检查了静脉窦隔和右心房右静脉瓣对欧氏瓣和心最小静脉瓣形成的贡献。静脉窦隔参与将右静脉瓣分为欧氏瓣和心最小静脉瓣。从其最初起源开始，静脉窦隔就在右肝静脉（下腔静脉肝段，即下腔静脉的前身）开口与静脉窦左角（冠状窦的前身）之间形成一个间隔结构。在静脉窦并入右心房之前，它处于窦内位置，并在左、右静脉瓣基部之间延伸。在静脉窦并入右心房的过程中，静脉窦隔获得心房内位置，并且其与静脉瓣及相应静脉开口的位置关系原则上保持不变。由于静脉窦隔与右静脉瓣相连，在静脉窦并入完成后，右静脉瓣的上部呈Y形分支为一个外侧支（即其原来的下部）和一个内侧支（即静脉窦隔）。（摘要截取自250字）
