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(Circulation. 1973;48:506.)
© 1973 American Heart Association, Inc.

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Diagnosis of Aortic Root Dissection by Echocardiography

NAVIN C. NANDA M.D.¹; RAYMOND GRAMIAK M.D.¹; PRAVIN M. SHAH M.D.¹

¹ From the Departments of Medicine (Cardiology) and Radiology, University of Rochester School of Medicine and Dentistry, Rochester, New York.

Six patients with aortic root dissection confirmed by angiography, surgery, or autopsy were studied by echocardiography. All showed marked parallel widening of the anterior (16 to 21 mm) and/or posterior (10 to 13 mm) aortic walls together with enlargement of the aortic root image. (Normal mean aortic wall thickness 5.7 mm, sd 1.2; aortic valve disease patients 6.7 mm, sd 1.5.) In five patients slender aortic valve cusps were recorded moving to the periphery of the inner lumen in systole and not extending to the outer lumen. This finding is useful in excluding calcification of the aortic valve which may produce confusing multiple echoes within the aortic root. Two patients showed 8 to 20 mm variations in the width of the aortic image with slight change in the direction of the transducer indicating that the dissecting hematoma was not uniform in thickness. Other associated findings on the echogram seen in three patients included the demonstration of pericardial fluid collection and mitral diastolic flutter suggestive of aortic regurgitation. Demonstration of enlargement of the aortic root with marked parallel widening of anterior and/or posterior walls appears to be specific for aortic root involvement in dissecting aneurysm of the aorta.

Key Words: Aortic wall thickness • Catheter in right ventricle • Aortic root enlargement • Aortic valve disease • Ultrasound • Aortic dissecting aneurysm

Submitted on February 13, 1973
Accepted on April 26, 1973

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