title: Echocardiogram in atrial septal defect with small left-to-right shunt.
mesh_terms: D000293:Adolescent; D004452:Echocardiography; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006334:Heart Function Tests; D006344:Heart Septal Defects, Atrial / Q000503:physiopathology*; D006801:Humans; D011652:Pulmonary Circulation; D014655:Vascular Resistance