title: Later results of closure of secundum atrial septal defect in children.
mesh_terms: D000293:Adolescent; D001835:Body Weight; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006333:Heart Failure; D006344:Heart Septal Defects, Atrial / Q000601:surgery*; D006801:Humans; D008297:Male