Before making a selection consider this. Take a look at the Anti-Coagulation forum. Nearly 4000 posts. Most of which deal with problems and concerns. Do you really want to be reminded every day of your life that you have a mechanical valve and all the problems that go with it? Now with the new Valve in Valve Tavr procedure I see very little reason why anyone would select a mechanical valve. I got my tissue valve 15 years ago and the only time I am reminded of it is when I have my yearly echo. And the valve is working as good now as it ever did. So please read thoes posts in the Anti-Coagulation forum before you make a decision.