title: Primary "T" wave changes in children.
mesh_terms: D000200:Action Potentials; D000328:Adult; D002118:Calcium / Q000097:blood; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006321:Heart / Q000502:physiology*; D006329:Heart Conduction System / Q000502:physiology; D006331:Heart Diseases / Q000175:diagnosis / Q000503:physiopathology; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008274:Magnesium / Q000097:blood; D011188:Potassium / Q000097:blood; D012964:Sodium / Q000097:blood
chemical_list: D012964:Sodium; D008274:Magnesium; D011188:Potassium; D002118:Calcium