Echocardiography cases. Atrial septal defects.
D003937:Diagnosis, Differential; D004452:Echocardiography / Q000379:methods*; D006330:Heart Defects, Congenital / Q000175:diagnosis; D006337:Heart Murmurs; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis*; D006801:Humans; D007223:Infant; D008297:Male