title: [Ostium secundum atrial septal defect in the patients aged 40 and over].
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D004452:Echocardiography; D005260:Female; D005500:Follow-Up Studies; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013599:Systole