Kim S H, Chung J W, Im J G, Choi Y W, Choe Y H, Han M C
Department of Radiology, Samsung Medical Center, College of Medicine, Sungkyun kwan University, Seoul, Korea.
J Thorac Imaging. 1999 Apr;14(2):142-6. doi: 10.1097/00005382-199904000-00016.
To propose a hypothesis about the embryogenesis of the subaortic left innominate vein, the authors reviewed the radiologic features of 14 patients diagnosed with subaortic left innominate vein made by computed tomography or magnetic resonance imaging scan. The authors retrospectively analyzed the level of the aortic arch, associated aortic arch anomalies, and the presence or absence of obliteration of the prevascular space. A high aortic arch was seen in 10 patients, five with a cervical, two with a right and, one with a double aortic arch. The prevascular space was occupied by the aortic arch, the great arteries, or both in all 10 patients with a high arch. In the remaining four patients with a normal aortic arch, the prevascular space was preserved, but abnormal elongation of the aortic segment between the left common carotid artery and the left subclavian artery was seen in three. The authors postulate that precardinal anastomosis can develop in any pathway where there is the available space. In the presence of abnormal elongation of the aortic arch and resultant widening of the subaortic space, the chance of the development of a subaortic left innominate vein increases.
为了提出关于主动脉下左无名静脉胚胎发生的假说，作者回顾了14例经计算机断层扫描或磁共振成像诊断为主动脉下左无名静脉患者的放射学特征。作者回顾性分析了主动脉弓的水平、相关的主动脉弓异常以及血管前间隙是否闭塞。10例患者可见高位主动脉弓，其中5例为颈位，2例为右位，1例为双主动脉弓。在所有10例高位主动脉弓患者中，血管前间隙被主动脉弓、大动脉或两者占据。其余4例主动脉弓正常的患者，血管前间隙得以保留，但3例患者可见左颈总动脉与左锁骨下动脉之间的主动脉段异常延长。作者推测，主前吻合可在有可用空间的任何途径中发育。在主动脉弓异常延长并导致主动脉下间隙增宽的情况下，主动脉下左无名静脉发育的可能性增加。
