Oh, and your leg may start to feel sore about 24 to 48 hours after surgery, or you may experience chest pain. If the doctor supplies you with painkillers, decline them. Ask for an alternative, because painkillers can often get addictive fast.
At your age, I can pretty much guarantee you will live.
You can't guarantee he'll live. Heart procedures are, while the most advanced, one of the most dangerous operations that you can undergo, because if the doctor makes one small mistake and cuts a ventricle or freezes the wrong cell, you could be looking at a blood transplant, or death.
Remember, surgery is not a game. You can't always say you'll make it out, because sometimes you won't, and I know that first hand.
I can't remember if it was the same drug they used to put me under with, as it was multiple years ago. However I have two things to say if it is (and maybe even if it isn't) First is that I had the weirdest dream, however the doctors said that weird dreams are normal so whatever about that. Second I did not wake up nauseous, just cross-eyed for like 10-15 minutes.
It probably won't be the same anesthesia because his operation and yours probably vary, as well as your medical records, and what readings they receive from the electrocardiograph.