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(Circulation. 1974;49:226.)
© 1974 American Heart Association, Inc.

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Echocardiographic Findings in Discrete Subvalvular Aortic Stenosis

RICHARD L. POPP M.D.¹; JAMES F. SILVERMAN M.D.¹; JAMES W. FRENCH M.D.¹; EDWARD B. STINSON M.D.¹; DONALD C. HARRISON M.D.¹

¹ From the Cardiology Division and the Departments of Radiology, Pediatrics and Surgery, Stanford University School of Medicine, Stanford, California.

Echographic features of three patients with discrete subvalvular aortic stenosis are presented. These include a narrowed area of the left ventricular outflow tract just below the aortic valve cusps in all cases. A high-intensity but thin echo was seen in the high left ventricular outflow tract at the level of the mitral annulus in one patient with a subaortic diaphragm. In one of the three patients abnormality of aortic cusp motion was suggested as well.

Key Words: Ultrasound • Angiography • Congenital heart disease • Idiopathic hypertrophic subaortic stenosis • Diagnostic methods

Submitted on June 21, 1973
Accepted on September 7, 1973

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