my fleshy aortic and pulmanary valves are 12 Years old. Had a ROSS procedure 12 years ago at the age of 20 so technically both valves are tissue replacements. Had a bad bout of endocarditis 2 years ago at age 30 that nearly killed me. since then my aortic valve and root have been on the decline and I am scheduled to have both repaired in the next couple weeks. I have been told artificial is my only option at this point.