Castellanos A W, Hernández F
Arch Inst Cardiol Mex. 1987 Jan-Feb;57(1):25-9.
The assessment of the size of the right atrium in the postero-anterior X Rays projection is based in the morphology and size of the right lower cardiac border. This segment of the cardiac silhouette has not been exhaustively studied and it does not appear in atlas or textbooks in cardiology and radiology. We measured its length (L-D-D') and its convexity (A-D-D'). We obtained the measurements of normal cases and 73 patients with congenital valvular pulmonary stenosis correlated to the body surface area (BSA m2). All cases were studied with cardiac catheterization and angiocardiography. We concluded that all cases with measurement higher than normal value must be considered abnormal but other structures superimposed over the cardiac silhouette must be ruled out, such as thymus gland, intrathoracic tumors, etc..
在后前位X线投影中对右心房大小的评估基于心脏右下缘的形态和大小。心脏轮廓的这一部分尚未得到详尽研究，在心脏病学和放射学的图谱或教科书中也未出现。我们测量了其长度（L-D-D'）及其凸度（A-D-D'）。我们获取了正常病例以及73例先天性瓣膜性肺动脉狭窄患者与体表面积（BSA m²）相关的测量值。所有病例均通过心导管检查和心血管造影进行研究。我们得出结论，所有测量值高于正常值的病例都必须被视为异常，但必须排除叠加在心脏轮廓上的其他结构，如胸腺、胸内肿瘤等。
