title: The incidence and significance of superior QRS axis in children with cyanotic congenital heart disease.
mesh_terms: D006328:Cardiac Catheterization; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D005260:Female; D006330:Heart Defects, Congenital / Q000503:physiopathology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D013771:Tetralogy of Fallot / Q000503:physiopathology; D014188:Transposition of Great Vessels / Q000503:physiopathology