these results indicate that complete excision of the ring with the aid of cardioplegia has significantly reduced the recurrence rate of subaortic stenosis ( 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 .
C0015250
complete excision
C0543467
operation