An email from my stepmom from a few minutes ago says that "surgery went well and that he is sleeping still. He has more tubes and stitches than I can believe. He's trying to wake up, and as he does, they will have him walk around a bit.
The surgeon says that his heart is extremely strong, and once he has recovered there will be no lasting consequence from the valve problem."
We are all breathing a sigh of relief (especially Chase) and are praying still.