title: Functional closure of atrial septal defects.
mesh_terms: D000790:Angiocardiography; D006328:Cardiac Catheterization; D002648:Child; D002675:Child, Preschool; D004395:Dye Dilution Technique; D005260:Female; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis / Q000503:physiopathology*; D006439:Hemodynamics; D006801:Humans; D007223:Infant; D008297:Male