title: The QRS in normal Indian infants and children: an electrocardiographic study.
mesh_terms: D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000502:physiology*; D006801:Humans; D007194:India; D007223:Infant; D007231:Infant, Newborn; D008297:Male