title: Results of operation for atrial septal defect in patients forty years of age and older.
mesh_terms: D000328:Adult; D004395:Dye Dilution Technique; D005260:Female; D005500:Follow-Up Studies; D006344:Heart Septal Defects, Atrial / Q000401:mortality / Q000601:surgery*; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged