Which of the following statements about supravalvular aortic stenosis are true?
A. Surgical repair is indicated only when the systolic gradient exceeds 75 mm. Hg.
B. Simple excision of the supravalvular membrane results in satisfactory relief of the stenosis in most patients.
C. The diffuse form of supravalvular aortic stenosis may cause obstruction to branches of the aortic arch.
D. Reoperation after repair of discrete supravalvular aortic stenosis is rare unless abnormalities of the valve itself also exist.
Answer:C
Which of the following statements about supravalvular aortic stenosis are true?
A. Surgical repair is indicated only when the systolic gradient exceeds 75 mm. Hg. B. Simple excision of the supravalvular membrane results in satisfactory relief of the stenosis in most patients. C. The diffuse form of supravalvular aortic stenosis may cause obstruction to branches of the aortic arch. D. Reoperation after repair of discrete supravalvular aortic stenosis is rare unless abnormalities of the valve itself also exist.