title: Catheter placement within the atrial septum: demonstration of the potential space between the septum primum and septum secundum.
mesh_terms: D006328:Cardiac Catheterization; D002932:Cineangiography; D006321:Heart / Q000000981:diagnostic imaging; D006346:Heart Septum / Q000000981:diagnostic imaging*; D006801:Humans; D007231:Infant, Newborn; D008297:Male