Good luck to both of you, I'm sure all will turn out well. Keep positive thoughts.
My Father recently had sugury to correct multiple heart problems and he came out great even at 81 years old. Medical care is great these days and almost anything can be delt with. Noticable improvement in treatment just in the last nine years even when he had heart surgury the first time.
Try not to worry about anything before you even know if its something to worry about. Chances are very good its no big deal.
We will all be thinking of you both.