Aortic dissection as complication of supravalvular aortic stenosis.

A 2-year-old patient with diffuse supravalvular aortic stenosis and the Williams-Beuren syndrome at autopsy was found to have dissection of the ascending aorta in addition to severe coronary artery disease and microfocal myocardial fibrosis. These findings emphasize the need for early surgical intervention in supravalvular aortic stenosis.