Welcome to HCM forum.
All cardiac surgeries are high risk surgeries with variation from case to case.
However in case of congenital heart disease
( hole in heart ) it's best to get it treated as early as feasible and in a big institute with adequate facilities for intensive care of infants.
It's recommended that you should go ahead with your child's surgery if your cardiac surgeon
has advised so for the best prognosis of your baby.
Wishing your baby good health.