[Left atrial myxoma masking atrial septal defect].
D003937:Diagnosis, Differential; D005260:Female; D006325:Heart Atria / Q000000981:diagnostic imaging*; D006338:Heart Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis*; D006801:Humans; D008875:Middle Aged; D009232:Myxoma / Q000000981:diagnostic imaging* / Q000601:surgery; D014463:Ultrasonography