Aortic Stenosis, Supravalvular

Aortic Supravalvular Stenosis; Aortic Supravalvular Stenoses; Stenoses, Aortic Supravalvular; Stenosis, Aortic Supravalvular; Stenosis, Supravalvular Aortic; Supravalvular Stenoses, Aortic; Supravalvular Stenosis, Aortic
A narrowing of the aorta in the region above the aortic valve.