title: [Estimation of pulmonary to systemic flow ratio in atrial septal defect by echocardiography].
mesh_terms: D000293:Adolescent; D000328:Adult; D001775:Blood Circulation; D002648:Child; D002675:Child, Preschool; D002932:Cineangiography; D004452:Echocardiography; D005260:Female; D006344:Heart Septal Defects, Atrial / Q000503:physiopathology*; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D011652:Pulmonary Circulation