Abstract
A brief discussion of theory of unipolar lead electrocardiography has been presented. The findings on 50 normal infants and children and 72 cases of congenital heart disease have been presented. The advantage of the unipolar limb and precordial leads over standard electrocardiography has been confirmed by the study presented. The R/S ratios and ventricular activation time offered more reliable criteria for hypertrophy than did the ST segment and T-wave changes.
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