I didn't have time to read all the responses, so if I'm duplicating another, I apologize.
One thing to consider - your young man should, all going as planned, be able to physically return to all normal human activities. He may, depending upon post-op meds, need to watch his alcohol consumption, but even that can be managed. The thing to watch for is post-op depression, which can affect the patient's interest in doing the things he now can. Some patients are not affected, some just a little, and some so profoundly that they need medical attention for the depression. I do not predict that your guy will have negative consequences, I'm just mentioning it so that if it does occur, you both can know it is not you as people who have issues. It is a common occurrence and can be helped. So - don't worry about it happening, but if it does, go for help quickly and all will be well.
Good luck. You're young and should have long, wonderful lives ahead.
Go Class of 2011!
9 Years in The Waiting Room, then on February 28, 2011,
AVR with 23mm Edwards Bovine Pericardial Tissue Valve, Model 3300TFX, Pacemaker - Boston Scientific Altrua 60 DDDR IS-1 and CABG (LIMA-LAD) at Northwestern Memorial Hospital, Chicago by Dr. Patrick McCarthy and the most wonderful team of professionals I could ask for.