Abstract
The Frank lead vectorcardiograms of 31 catheterized cases of atrial septal defect of secundum type were reviewed and the results were correlated with the hemodynamic observations. Although no definite relationship was demonstrated between the vectorcardiographic measurements and the hemodynamic data, there was a significant correlation between the QRS patterns in the frontal plane and the right/left ventricular work ratios. The vectorcardiograms were thought to be of some value for assessment of the severity of right ventricular overloading in atrial septal defect.
