Fig. 17From: The role of computed tomography in pre-procedural planning of cardiovascular surgery and interventionCT scans showing patients not suitable for percutaneous device placement. a Large ASD (arrow) with no anterosuperior rim. b Large ASD (arrow) with intact posterosuperior rim (PS), but absent posteroinferior (PI) rim. c ASD (arrow) with absent anterosuperior rim and rim with right superior pulmonary vein (RSPV)Back to article page