Electrocardiographic patterns in normal children.
D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000502:physiology*; D006439:Hemodynamics; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male