抄録
As far as the counterclockwise frontal loop directed superiorly and to the left is concerned, persistent common atrioventricularc anal is the most common cardiac anomaly encountered. However, there are many lesions other than atrio-ventricular canal which present this peculiar vectorcardiographic pattern. In the present study, vectorcardiograms showing this peculiar pattern of atrial septal defect (ostium secundum type), ventricular septal defect, tetralogy of Fallot, tricuspid atresia, and transposition of the great vessels were analyzed. In addition, several points of prime importance, necessary for differentiation, were emphasized.