title: Atrial septal defect--echocardiographic assessment before and after surgical repair.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D004452:Echocardiography; D005260:Female; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000175:diagnosis