Welcome Aboard Mac...
We have 20 some Post Radiation Treatment Heart Valve Replacement Survivors among our VR.com membership. You can find their posts by doing a Search (see the Blue Line at the top of the page) for Keywords "radiation" and "Hodgkins". Most are Hodgkins survivors, but a few Breast Cancer treatment survivors also.
I know of only ONE Radiation Treatment Survivor who received Tissue Valves, a 70+ year old Female who also had other co-morbidities who received Bovine Pericardial Tissue Valves in both the Aortic and Mitral Valve Positions. Unfortunately I don't remember her name....
xxxxx1234. Her daughter is the VR.com member
Members whose Surgeons were familiar with Radiation Damage often reported that the Surgeon told them in advance that he wanted to use Mechanical Valve(s) due to the Scar Tissue Issue and increased risk from repeat surgeries.
I am not aware of any Surgeon at Mayo who uses the On-X Valves yet. Mayo (and other Hospitals) often put their Mechanical Valve Business up for Competitive Bid and select only one or two for their 'standard offerings'.
Cleveland Clinic just started using On-X earlier this year. Dr. Lytle is the "Radiation Guru" at CC. Dr. Petersson is the most prolific On-X user at CC. Emory University Hospital (Atlanta) is the sponsor of the On-X NO / LOW AntiCoagulation Studies and their surgeons are well acquained with those valves.
If you have read my posts in the Valve Selection Forum, you know that I am favorably impressed with the technological advancements offered by the On-X valves.
You need to learn more about living with / on Anti-Coagulation. I recommend starting with the "Stickys" at the top of the Thread List under the Anti-Coagulation Forum. Also read AL Lodwick's informative website
www.warfarinfo.com He is a retired anticoagulation clinic Director and Certified A-C Care Provider.
That should keep you busy reading for a while!
Feel free to ask more questions as they arise.
'AL Capshaw' (see my profile under Community, Members List - we share some common 'experiences')