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(Circulation. 1959;20:181.)
© 1959 American Heart Association, Inc.

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Functional Aortic Stenosis

A Malformation Characterized by Resistance to Left Ventricular Outflow without Anatomic Obstruction

ANDREW G. MORROW M.D.¹ EUGENE BRAUNWALD M.D.¹

¹ From the Clinic of Surgery, National Heart Institute, Bethesda, Md.

When the clinical findings of aortic stenosis are present and a pressure gradient is demonstrated between the left ventricle and aorta, a discrete site of obstruction, generally amenable to surgical correction, has been assumed. The fallacy of this widely held concept is emphasized by the operative and hemodynamic findings in 3 patients described.

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