Single oblique lead electrocardiography in early childhood.
D005117:Cardiac Complexes, Premature / Q000175:diagnosis; D006332:Cardiomegaly / Q000175:diagnosis; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D005621:Friedreich Ataxia / Q000175:diagnosis; D006330:Heart Defects, Congenital / Q000175:diagnosis; D006331:Heart Diseases / Q000175:diagnosis*; D006801:Humans; D008403:Mass Screening; D010490:Pericardial Effusion / Q000175:diagnosis