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(Circulation. 1958;18:1155.)
© 1958 American Heart Association, Inc.

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Graded Pulmonary Vascular Changes and Hemodynamic Findings in Cases of Atrial and Ventricular Septal Defect and Patent Ductus Arteriosus

DONALD HEATH M.D.¹; H. FREDERIC HELMHOLZ JR. M.D.¹; HOWARD B. BURCHELL M.D.¹; JAMES W. DUSHANE M.D.¹; JESSE E. EDWARDS M.D.¹

¹ From the Mayo Clinic and the Mayo Foundation, Rochester, Minn. The Mayo Foundation is a part of the Graduate School of the University of Minnesota.

With use of a previously described system of grading, a study was made of the relation between each of the grades of hypertensive pulmonary vascular disease and the hemodynamic findings in the lesser circulation in 15 cases of atrial septal defect, 19 cases of ventricular septal defect, and 6 cases of patent ductus arteriosus.