THE VECTORCARDIOGRAM IN ATRIAL SEPTAL DEFECT

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Abstract
Thirty-five pa-tients in whom the diagnosis of atrial septal defect was established by cardiac catheterization had vcgs showing moderate right ventricular hypertrophy in 24 instances. This was helpful in the differential diagnosis since the vcg does not show right ventricular hypertrophy in normal subjects with right bundle branch block or in mild pulmonary stenosis. Three of five patients in whom an A-V cushion defect was suspected showed characteristic vcgs that can be recognized in the ecg as left axis deviation.