AngelaR....If your surgeon doesn't want to proceed with an On-X and you do start looking again you may want to contact Gosta Pettersson at the Cleveland Clinic. He has completed 50+ of the On-X valves, did mine just over 3 weeks ago. I think this valve has been out there for 6 to 8 years and Dr P. is one of the most experienced in the procedure. From what I read its slightly more difficult to install due to the profile of the valve but it is supposed to be the best on the market currently. I know Cleveland is a bit of a way for you but I can tell you that once I contacted Dr. P and pleaded my case (letter describing who I am and my diagnosis) along with a copy of my most recent echo they had me lined up pretty quick for surgery. Actually about 10 days after he accepted me as his patient. That would be the one question I would ask any surgeon about the On-X. How many of these have you done ? Im not much for being a trail blazer, I want experience. The other thing about Dr P is that he did a minimally invasive procedure on me (incision is 4 to 5 inches), versus the standard 8. All I had done was Aortic Valve replacement, everything else was good to go which Im sure drove the type of procedure he leveraged.
Good luck ! Hopefully your guy comes through for you and its all a non-issue !
Scott