A recent new member just reported having her Porcine Mitral Valve Replaced after 16 years
and Bovine Tissue Valves typically outlast Porcine Valves.
My recommendation: Keep up your regular follow-up examinations and Echocardiograms.
In the meantime, go out and Enjoy your Extended Life to the fullest.
'AL Capshaw'
"Hear Hear" to Al's recommendation!
Two footnotes to Al's info above: (1) That new member was 21 years old when she started those 16 years with her pig valve. The older you are, on average, the longer your tissue valve will last, and vice versa, so that new member did very well. (2) The latest and best study on a well-established tissue valve with a long track record was done on "my" valve, the Medtronic Hancock II pig valve, and done at "my" hospital, Toronto General. It's called "Hancock II Bioprosthesis for Aortic Valve Replacement: The Gold Standard of Bioprosthetic Valves Durability?" and it's
here. Unfortunately, you've got to pay for an online copy, but my surgeon sent me a fax. In the last few pages, they compare their pig-valve results at 15 years to all the published 15-year results from all the other tissue valves, including the cow (pericardial) valves, primarily the CEP. The Hancock II has been holding up several years better, so it looks like that "bovine outlasts porcine" notion isn't backed up by the evidence =~ myth. (They discuss its origins in the "Gold Standard" study.) OTOH, the CEP has also been holding up very well (on average) over the long haul. That article gives some 20-year data for the Hancock II -- VERY good for the over-60 crowd, and not bad for the young 'uns -- and there should be some 20-year data published for the CEP quite soon, so we'll know even more.
As I've discussed elsewhere, it's always possible that the superior results of the pig valve at TGH aren't just because of the superior pig valve, but partly due to TGH being superior, or Ontario's partly-socialized medical system being better, or other factors that don't bear directly on valve choice. That's why we need multiple studies, slicing the data in different ways. . .
Or we can just live our lives as best we can, knowing that the future will arrive some day. . . One more personal choice!