Cats for what its worth I have a child with a severe congenital cardiac problem who had his 1st op at a few days old and is now 4! He's had further ops and will need more in future but he is a lovely bright happy welladjusted miracle ! It is hard (HELL) at times when he's ill but we have learned a lot and I haven't had a bad hair day since he was born!!! It just changes your perspective on everything. Its such a shock when you find out but babies are amazing at coping with stuff and I'm sure yours will too.
very best of luck... keep me posted...