This is sort of reassuring:
"Current consensus guidelines state that choice of either a bioprosthetic or mechanical prosthetic aortic valve is reasonable in patients aged 60 to 70 years, and that a mechanical valve replacement is reasonable in patients younger than 60 years without contraindications to coumadin."
I was 63. It was a quick decision for me to go with a biological valve. As I have stated here before, if I had known of this forum while deciding I probably would have opted for a mechanical valve. There is nothing I can do about things now except take care of myself as best as I can.
I am not worrying about a future surgery, yet. now that I have recently experienced a burst of rejuvenation I am feeling younger than I am again.