assuming you were asking me
.... May I ask what is SVD?
Structural Valve Degradation (SVD)
There's a lot written on it, its the primary problem with bioprosthetic valves.
The following is very detailed
The implantation of bioprosthetic heart valves (BHVs) is increasingly becoming the treatment of choice in patients requiring heart valve replacement surgery. Unlike mechanical heart valves, BHVs are less thrombogenic and exhibit superior hemodynamic properties. However, BHVs are prone to structural valve degeneration (SVD), an unavoidable condition limiting graft durability
since they are known to fail with an average lifespan of 12 years one has to ask why they are "increasingly becoming the treatment of choice"
(and who's choice they are meaning)
I did not have a bicuspid valve, I did have an aneurism which was addressed with the first surgery and is in good shape
excellent (although to me an aneurysm without Biscupid Aortic Valve and a valve that is also calcified is a little rarer).
I see you are 55 now, you don't mention if you are in good health or how fit you are or indeed your activitiy levels. That your body destroyed a bioprosthetic valve in under 15 years suggests you are fit and active. Curiously that's exactly the people who should choses a mechanical valve at an age under 50yo.
Summitting Everest was just one of my triumphs as a recipient of a mechanical heart valve.
I suspect you were perhaps misled about
- the potential durability of a tissue (bioprosthetic) valve
- the horrors of warfarin and the limitations of mechanical valves
- the difficulty and restrictions of "constant INR testing"
in your previous discussions here.
I haven't checked the thread history, but unless you are medically contra-indicated to being on warfarin I recommend you give it a good look now. Amusingly proponents of bioprosthetic valves love to cite "but the new ones, they've fixed that, it was in the Edwards sales pamphlet" You were probably told that 12 years back ... strangely after being here for over 10 years I still see the valve durability being about what it was 20 or 30 years ago in those age groups.
Just in case you do consider a mechanical for your next valve surgery:
A patients perspective I've decided to put this page together because on looking around the internet I see heaps of rubbish, mis-informatio...
As Dr Schaff says in that presentation "run don't walk from any sugeons office" who says there is no problems with serial redo operations.
In case you haven't see this 2009 presentation I recommend you grab a notepad and a cup of tea / coffee and follow through this carefully
last point: "follow the money
" ... and there is more money in offering more expensive tissue valves and redo-operations than a mechanical and warfarin.