RT Journal A1 SINGLETON EB, McNAMARA DG, COOLEY DA T1 RAdiologic features of isolated ventricular septal defects JF A.M.A. Archives of Surgery JO A.M.A. Archives of Surgery YR 1959 FD November 1 VO 79 IS 5 SP 715 OP 723 DO 10.1001/archsurg.1959.04320110017003 UL http://dx.doi.org/10.1001/archsurg.1959.04320110017003 AB The roentgenologic features of isolated ventricular septal defects depend upon size of the defect, amount of pulmonary resistance, and resulting direction and degree of the shunt. Fluoroscopy is indispensable in evaluating the physiologic alterations in all forms of congenital heart disease and should be a part of the radiologic evaluation of ventricular septal defects. Routine chest roentgenograms, including posteroanterior and right and left oblique with radiopaque contrast material in the esophagus, are equally important not only in determining the anatomical alterations but also in serving as a permanent record for comparison with subsequent studies. There are no pathognomonic radiographic characteristics of ventricular septal defects, but certain distinguishing features should be recognized. Because the alteration in cardiac configuration in ventricular septal defects as well as in other types of congenital heart disease is dependent upon pressure changes, we have devised the following classification in which the radiologic features are correlated with