Interesting - my reading/surgeon indicated that I'll buy more time from my tissue valve by being active than by riding the couch.
he's right ... but not only from the tissue (from health), and define "active"
Doctors (surgeons included) seem to not really deeply engage with you and your lifestyle.
With respect to data I'm driven by what I see mentioned (almost as an aside) in every paper I read (no, I don't just read the "conclusions" and "abstract") But here's one for you which is neutral
https://www.acc.org/latest-in-cardi...sthetic-valve-durability-incidence-mechanisms
I encourage you to search the boards here (with a good google search such as
this, or similar key words)
This link is a good starter, consult points 7 and 8 (which does not directly address that specific aspect of the question.
Another minor data point - had a consult w/ the shoulder surgeon and he basically flat out said that at my age, a full shoulder replacement was a no-go if I were on blood thinners. They'd arthro as best they could, but wouldn't take the chance on the open shoulder surgery.
now that is something which is really out of my depth ... I've had minor surgeries (well and some debridements) on ACT, but that may be different.
I bridle when I hear "blood thinners" because it implies an ignorance of what's happening (and thinning isn't one of them).
Some links I found in a quick dig. The implication for all of the readings is that SVD is just going to happen (NB
The biological tissue from both surgical and transcatheter bioprostheses is prone to structural valve degeneration (SVD) ) (cited from this
link but the whole thing is worth a view)
I interpret this as meaning inflammation reactions such as are common as a side effect of high activity "
...In addition to this passive degenerative process, several studies have suggested active mechanisms that trigger inflammatory responses that are followed by calcification "
My understanding is supported by studies like this:
https://www.frontiersin.org/articles/10.3389/fphys.2019.01550/full
Exercise leads to a robust inflammatory response mainly characterized by the mobilization of leukocytes and an increase in circulating inflammatory mediators produced by immune cells and directly from the active muscle tissue. Both positive and negative effects on immune function and susceptibility to minor illness have been observed following different training protocols. While engaging in moderate activity may enhance immune function above sedentary levels, excessive amounts of prolonged, high-intensity exercise may impair immune function.
Perhaps someone with a better knowledge of exercise physiology would care to comment (
@leadville thoughts?) on the accuracy of my assumption here.
Lastly I'll say that almost no studies or data is around that focuses on (even amateur) athletes and their bio-prostheses and nobody in health is going to say "don't live a healthy lifestyle with good exercise"
wever, SVD limiting valve durability continues to be one of the main limitations of biological (vs. mechanical) valves ... Valve leaflet calcification has been recognized as the primary mechanism responsible for SVD, and the factors associated with an increased risk are related to patient characteristics (younger age, larger body mass index), cardiovascular risk factors, and variables pertaining to bioprosthetic valves per se (increased transvalvular gradient, prosthesis-patient mismatch). Although the reported durability of surgical aortic bioprosthesis is >85% at 10 years, most studies to date have used reoperation instead of valve performance parameters to define valve durability
Lastly: this is something I have picked up over the years and I've simply not gathered a bibliography on it because I've really focused my research on me ... and I was entirely certain (as we my surgeon) that my homograft replacement would NOT be a tissue prosthesis having my 3rd surgery at the age of 48.
HTH