Fig. 18From: The role of computed tomography in pre-procedural planning of cardiovascular surgery and interventiona Two normal pulmonary veins on the left, left superior pulmonary vein (LSPV) and left inferior pulmonary vein (LIPV). On the right, in addition to the right superior pulmonary vein (RSPV) and right inferior pulmonary vein (RIPV), there are accessory ostia for the right middle vein (RM), superior segment of the right lower lobe (RSLL) and the posterior segment of the upper lobe (PUL). b Coronal oblique view of left atrium show severe stenosis of the left and right inferior pulmonary veins (arrows). c Axial CT scan shows a hypodense thrombus in the left atrial appendage (arrow)Back to article page