title: [Electrocardiographic studies in chronic cor pulmonale in children].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D004562:Electrocardiography; D005260:Female; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D007223:Infant; D008297:Male; D011660:Pulmonary Heart Disease / Q000175:diagnosis*
vernacular_title: Badanie elektrokardiograficzne w przewlekłym sercu płucnym u dzieci