Actually, I am getting the Mosaic valve, as my surgeon prefers it, although he said he'd be willing to put in the CE Perimount Magna (bovine) if I want.
The thing that seems to attract the surgeons to the porcine products is that the pig valve is actually a valve. It's been chemically treated to not be rejected. In the case of the Mosaic, it has also been treated to reduce calcification. Calcification is listed as the primary cause of valve failure in every place I have seen it referred to, infections notwithstanding. Perhaps the point was that infections are a primary cause of premature tissue valve failures, rather than failures as a whole.
The bovine (CE) valve is not actually a natural valve, but is a valve manufactured from natural materials (bovine pericardium). It has also been chemically treated not to be rejected. However, it can fail due to a manufacturing fault (quite rare). That bit of manufacturing is what sems to send the surgeons off of it. This latest version, just put out in February, has a new, anti-calcification treatment also.
The statistics published on a limited number of the CE valves are quite strong, indicating that over 90% reached 18 years with the valve, 80% reached 20 years. However, Winston Churchill aptly stated that there are three kinds of lies: "lies, damned lies, and statistics." I don't mean that some valves didn't last that long, or that they lied, but do watch out how you interpret what the study says. It is implied, "of those who remained alive through the study..."
This longevity does couple well with the "normal life" ranges usually given for tissue valves, though. Standard expectations have generally been for porcine valves to go 13-15 years, and bovines 15-18 years. With the new models, both are claiming that 25 years may be within reach. I certainly hope we're all around to see that happen. I'm hoping my next valve will go the distance.
Personally, I'm not as concerned with the fact that the porcine valve might not go as long as the bovine right now. But that's a matter of personal timing. If I get 15 years from it, I will be 66. That's a somewhat more operable age than 71. In 15 years, a tissue valve should have been developed that can take me the rest of the way.
On the other hand, if it does last 20 years, I get to see my granddaughter graduate high school before I have to be reoperated. It's not unlike playing the market: bull or bear.
I'll take the time I get, either way, thank you.