title: [Contrast echocardiography in the diagnosis of atrial septal defect].
mesh_terms: D000328:Adult; D000368:Aged; D004452:Echocardiography; D005260:Female; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012965:Sodium Chloride; D014636:Valsalva Maneuver
chemical_list: D012965:Sodium Chloride