Nonvalvar aortic stenosis
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Seven cases of discrete nonvalvar aortic stenosis, three supravalvar and four subvalvar were treated between 1992 and 1994. Their ages ranged from 6 to 21 (mean 11.3) years. One patient had an associated supravalvar mitral membrane whereas another patient had the classical components of Williams — Beuren syndrome. The patients were investigated by echocardiography. Cardiac catheterisation and cineangiography were undertaken in four patients. Peak preoperative gradient was 27 to 110 (mean 52.3) mm Hg. All patients underwent surgical correction. Mean postoperative gradient was 28.1 (range 18 to 100) mm Hg. In a follow up of five months to two years, there has been no incidence of aortic insufficiency.
KeywordsAortic Stenosis Williams Syndrome Aortic Insufficiency Noncoronary Sinus Peak Systolic Gradient
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