title: Outflow tract obstruction in tetralogy of Fallot. Intraoperative analysis by echocardiography.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004452:Echocardiography; D006352:Heart Ventricles / Q000473:pathology; D006801:Humans; D007223:Infant; D013771:Tetralogy of Fallot / Q000473:pathology / Q000601:surgery*