title: [Mean axis of QRS in congenital heart diseases in children].
mesh_terms: D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D006321:Heart / Q000503:physiopathology*; D006330:Heart Defects, Congenital / Q000175:diagnosis / Q000503:physiopathology; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D013577:Syndrome
vernacular_title: Srednia oś zespołu QRS w wadach wrodzonych serca u dzieci