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March 1950

ELECTROCARDIOGRAMS OF NORMAL CHILDREN: With Special Reference to the aV Limb Leads and Chest Leads

Author Affiliations

From the Cardiovascular Department, Medical Research Institute, Michael Reese Hospital. This study was aided by the A. D. Nast Fund for Cardiovascular Research. This department is supported in part by the Michael Reese Research Foundation.

Am J Dis Child. 1950;79(3):449-466. doi:10.1001/archpedi.1950.04040010462005

SINCE the first electrocardiograms of children were taken by Nicolai and Funaro in 1908,1 many studies have helped to delineate their normal patterns. The importance of this work lay in the peculiar characteristics of the normal electrocardiograms of children.

The characteristics of the electrocardiogram were originally analyzed with regard to the presence of a deep S wave in lead I and of deep Q waves in leads II and III.2 When precordial leads were taken in normal children, the frequent inversion of the T wave in some of these leads was observed, and its normality was established.3

With multiple precordial leads and the use of the aV limb leads, it is possible to obtain increased knowledge about the electrocardiogram in normal children. In the recent studies of Vaquero and his associates,4 Suarez and Suarez,5 Goldberger6 and Groedel and Miller,7 the characteristics of the aV

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