| supravalvular aortic s. |
a rare form of aortic stenosis occurring above the aortic valve, usually caused by a complete circumferential fibrous ring of constricting tissue at the level of the sinus of Valsalva. See also Williams syndrome, under syndrome.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| supravalvular aortic stenosis s. |
Williams s.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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