Congenital lesions of the heart may be divided into three groups, which are more or less independent of each other. These groups are anomalies of position of the heart, lesions of the structures controlling rhythm and conduction, and malformations of the chambers or orifices of the heart. The purpose of this paper is to report a group of cases in which the diagnosis of congenital heart disease has been made, presenting the electrocardiograms that have been obtained from them, and to offer an explanation for the form of electrocardiographic curve that has been associated with congenital heart disease. These cases have been under observation either in the St. Louis Children's Hospital or in the Washington University Dispensary during the past year. The electrocardiograms have been made at the Heart Station of the Department of Internal Medicine, under the direction of Dr. G. Canby Robinson.
Electrocardiograms that show a distinct difference
McCULLOCH H. ELECTROCARDIOGRAPHIC STUDIES OF CONGENITAL HEART DISEASE. Am J Dis Child. 1916;XII(1):30-46. doi:10.1001/archpedi.1916.04110130033002