Hello,
You are relatively young which will help you recover quicker. This is really key. Had my Aortic Aneurysm repaired at age 39. I had no symptoms. They found it when doing a routine chest x-ray for an annual physical. Mine was about the same size as yours when I was operated on. It was growing at a rate of 2.0 cm per year. I had a prior heart surgery(at age 13) so there were some scar tissue complications but you won't have that if this is your first (Lets hope only) chest opening. When they read my x-rays I felt it was unusual they were sending me straight to a Surgeon instead of a Cardiologist(I didn't have a Cardiologist at the time). But there isn't much the Cardiologist could have done. I was really needing a Surgeon. I understand now why this was done. Get yourself a Cardiologist you will need them to check in on you after surgery. Otherwise the Hospital will probably assign one to you while you are in the hospital. Which is OK too. But you probably want to pick one yourself. Mine came a few times when I had Aortic Valve Surgery(Yup, my third surgery) this past January. Made the difference and I was out in 5 days. Hope some of this helps. You are fortunate to be in the younger age bracket as the surgery is very invasive and tough on the body(I know, I've had it twice). I'll be looking for your posts over time and would like to know how well you recover from the procedure. Keep your chin up.

All the best to you.

Bruce
Texas