Hi Carol,
There are some other considerations and not just tissue vs mechanical....
If you have coronary artery diesase (eg one or more of your coronary arteriesa re narrowed), you may need a coronary artery bypass graft (CABG)... some cadiologists do this at the time of valve replacement, depending on how advanced the coronary artery disease is.
I suspect all is ok with you, firstly being female (as the female hormones confer some protection during your early years, and also because you don't mention it as a problem, but just worth thinking about)
Let me explain further. If you have say, moderate coronary artery disease, the surgeon may advise that when you have the valve replaced you also have an "early" (preemtive if you loke) CABG procedure at the same time. If this is done, then it is advisable in some circumstances to have a long lasting medcahnical valve, because depending on how they do the CABG and what vessels are involved, the CABG can make redo valve operations more difficult or risky.
So, if a CABG is also a possibility, it may be best to have a mechanical valve and avoid, hopefully, having another operation.
Typically they will do a coronary artery angiogram to have a good look at your coronary vessels at some stage before a valve operation.
They do this because they need to stop your heart for the valve repalcement procedure as you will know, but they need to fill your cononary vessels with a solution to help keep your heart alive while it is very cold and stopped. If you have a partically blocked coronary artery, it can make the valve surgery more challenging, or you can suffer some more side effects, and hence doing a coronary artery bypass at the same time while your chest is open can be a good option.
Not only is everyones' valve procedure a little different, eg some have a dilated aortic root others have an oblong shaped aorta, and this can also impact on valve choice, but also the state of the coronary vessels can dictate to a certaion procedure whatshould be done, and sometimes its all these other issues that can als impact on the choice of valve....not just the warfarin question.
Also, be aware that some newer drugs are in the testing phase that may (or may not) replace warfarin in the forseeable future, which can make the whole warfarin issue and testing and diet stuff hopefullly fade away.
Also, if you have a tissue valve, and need a redo 5, 10, 15 or 20 years (its unpredicable unfortunately), you may need a CABG then and hence the whole idea of a percutaneous valve repalcement may not be an option anyway, as they will need to opne your chest to do the CABG.
And also, to use an analogy: If I need to paint the hallway, I like to open the front door, have some room to swing the paint brush and roller and paint the hallway. I don't paint the hallway by using a long thin paint brush and paint it by looking through the letterbox at the front gate.
The same issue with heart surgery. There is a lot to be said actually about opening the chest and actually seeing what you do, and cutting out the old valve (or old repalcement valve), and stitching in a new one neatly and checking for leaks and spraying some biological glue around to plug any leaks and then restarting the heart, and then getting out. So the whole percutaneous valve approach is really quite tricky, and honestly, whilst its a option for someone who may die from having open heart surgery, eg a ninety year old with other medical issues ...it may not be the best approach for 60 or 70 year old who is still quite fit and well...so I am not sure I would choose or plan on having a percutaneous valve replacement unless it was the only option due to the poor state of my health.......sooooo, after all that, its not just about warfarin, but sometimes the surgeons and cardiologists have some other reasons for recommending a particular valve and procedure, and some of them are not so good at openly explaining all these reasons....and they don't openly say to the patient : "I wish you would choose this procedure because I'm not quite as good at doing it that way or I have little experience with that valve".... or whatever....
I said, "Doctor, if you were in my place, honestly, what would you choose?"...
So, in summary....
1. Warfarin may be replaced by a better alternative in the forseeable future, and even if it isn't, for many people its not a big issue. I had it for only three months and it was ok, INR was ok, and it didn't change my diet etc.
2. Percutaneous valve repalcement, at this stage, is not really the best way to replace a valve in otherwise healthy people...its a backup procedure where open heart surgery has increased risks.
3. If you may have coronary vessels that need attention, and if you have a CABG then it can sometimes make a redo operation tricky, so a mechanical valve may be a better chice if you also have a CABG
4. It not just about a decision to avoid warfarin...sometimes there are size, shape and surgeon experience issues related to particular valves....
I had a tissue valve, and whilst my coronary vessels are ok they are not pefect, and when I have a redo valve operation I will almost certainly have a CABG at that time, so it was considered best that I had a tissue valve now, avoid a decade or more of warfarin, and when I have open heart surgery in 10 to 15 years ZI'll almost certainly need a CABG ...and at that time I will most likely get a mechanical valve...as I'll be 60 - 65 years of age by then...and then hopefully will not need another operation...
You need to be comfortable with your choice, but you also need to be guided carefully by your surgeon, and ask him/her direct questions...what would you do, etc etc