Theoretical approach to discrimination of atrial and ventricular septal defects when the left-to-right cardiac shunt is diagnosed by radionuclide angiography

This model attempts to show how one might deduce from analysis of the right heart and pulmonary time-activity curves whether the existing L-R shunt is caused by atrial or ventricular septal defect. The authors suggest a modification of the Maltz and Treves (1973) method which might verify the theoretical model. (U.K.)