cardiac catheterization was performed in 10 patients ( 77 % ) following the second valvotomy ( 2 years , 7 months mean follow-up ) : ( 1 ) three children , all infants at initial valvotomy , had a peak systolic ejection gradient less than or equal to 40 mm hg and only mild , at most , aortic regurgitation after the repeat operation ;
C0008059
children
C0021270
infants