This Dec will be 35 yrs post surgery. I had an Aortic Valve prosthesis procedure done because of an aneurysm of the aorta. The wall of my aorta was so thin the surgeons said they could see right thru it, and also commented that if I weren't in surgery that hour I wouldn't have made it. The prosthesis was prepared before surgery, allowing them to install a St Jude valve inside the 6 inches of dacron mesh aorta. I never dreamed I would live as long as I have, I am now going to be 67 years old with the valve prosthesis being 35 years old.