Forty-nine @entity1 underwent surgical excision of fixed @entity475 (discrete @entity82 and tunnel) between 1968 and 1984 and were followed up for 1 to 16 years (5.8 +/- 4). Twenty-six @entity1 (Group I) had isolated @entity475 and 23 (Group II) had @entity475 and associated @entity299 . Discrete @entity82 was present in 46 and tunnel type of obstruction in three @entity1 . For the discrete ring, excision alone was done in 32 @entity1 (four recurrences) and excision with myotomy in 17 (three recurrences). In Group I, there were no operative @entity204 and one late death from a noncardiac cause. In Group II, one early and two late @entity204 occurred. The actuarial survival rate for 10 years is 88%. Reoperations were performed in 10 @entity1 , seven for recurrence and three for aortic valve replacement for preexisting @entity337 that had progressed since the primary operation. Cardioplegia was used in 28 @entity1 (one recurrence) and was not used in 21 @entity1 (six recurrences). An operative residual gradient of less than 15 mm Hg was achieved in 25 of 28 @entity1 in whom cardioplegia was used compared to 12 of 21 @entity1 in whom cardioplegia was not used (p = 0.017). These results indicate that complete excision of the ring with the aid of cardioplegia has significantly reduced the recurrence rate of @entity475 (p = 0.033), elimination of the residual gradient at the initial operation has been a significant factor in reducing the recurrence rate (p = 0.017), and addition of myotomy in this series has not altered the outcome.

Long-term results after excision of fixed XXXX .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity82 :: ('MESH:D005355', 'Disease') :: ['fibrous ring'] @entity475 :: ('MESH:C564793', 'Disease') :: ['subaortic stenosis'] @entity337 :: ('MESH:D001022', 'Disease') :: ['aortic regurgitation'] @entity299 :: ('MESH:D006331', 'Disease') :: ['cardiac defects'] @entity204 :: ('MESH:D003643', 'Disease') :: ['deaths']
@entity475 :: (MESH:C564793,Disease) :: ['subaortic stenosis']
