IN CHILDREN the electrocardiogram has proved of value in establishing diagnoses of active carditis and congenital cardiac disease. In the quiescent stage of rheumatic heart disease, however, standard leads often yield normal tracings in children with enlarged hearts and obvious myocardial involvement.
In adults, precordial, as well as standard, leads have given valuable information in regard to hypertrophy of individual chambers of the heart.1 It was thought possible, therefore, that this technic might also be useful in studying rheumatic children and adolescents.
One hundred and fifty-six rheumatic subjects, 98 boys and 58 girls, were studied. Of these, 144 were children ranging in age from 6 to 15 years, who were observed in a convalescent home for periods of four months to four years, and 12 were adolescents followed in the outpatient department. All the patients gave histories of one or more attacks of rheumatic fever and, with one exception,