Ventricular hypertrophy and the electrical axis of the QRS complex in infancy.
D006332:Cardiomegaly; D018376:Cardiovascular Abnormalities; D002648:Child; D004560:Electricity; D004562:Electrocardiography; D006801:Humans; D007223:Infant
ELECTROCARDIOGRAPHY/in infancy and childhood; HEART ENLARGEMENT/in infancy and childhood