twelve patients with tight aortic valve stenosis underwent transluminal balloon valvuloplasty : 3 were infants whose ages ranged from 1 month and 24 days to 3 months and 23 days ( mean 80 +/- 13.7 days ) , and 9 were children aged from 4 to 17 years ( mean 10.44 +/- 4.61 years ) .
C0021270
infants
C0008059
children