Department of Radiology, University of Southern California, Los Angeles, California, USA.
Clin Anat. 2011 Nov;24(8):956-8. doi: 10.1002/ca.21250. Epub 2011 Aug 18.
We report a rare variant of the posterior descending artery (PDA) in a 51-year-old African-American male discovered in coronary CT angiography. Arising from the proximal right coronary artery near its ostium, the anomalous PDA penetrated posteriorly toward the atrioventricular junction septum, exited through the inferior pyramidal space into the posterior interventricular groove and continued in the groove as a short PDA. Along its course it gave rise to small branches to the medial wall of the right atrium, the atrioventricular node region, and the inferoseptal wall of the right ventricle.
我们报告了一例在冠状动脉 CT 血管造影中发现的 51 岁非裔美国男性的后降支（PDA）罕见变异。该变异起源于近段右冠状动脉口附近，异常 PDA 向后穿透房室结间隔，通过下锥空间进入后室间沟，并在沟内作为短 PDA 继续延伸。其沿途发出小分支至右心房内侧壁、房室结区域和右心室下间隔壁。
