title: [Evaluation of electrocardiographic records and effective thyroxine index (ETR) in hypothyroidism in children].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D006321:Heart / Q000503:physiopathology; D006801:Humans; D007037:Hypothyroidism / Q000175:diagnosis*; D007223:Infant; D013974:Thyroxine
chemical_list: D013974:Thyroxine
vernacular_title: Ocena zapisu elektrokardiograficznego i wskaźnika efektywnej tyroksyny (ETR) w niedoczynności tarczycy u dzieci.