Have to laugh when younger people facing valve replacement pick the mechanical one because it lasts forever, and the bovine one would probably have to be replaced in 30 years or so.
Thus they wind up with a valve which, I'm told, ticks like a clock and they'll be on blood thinners the rest of their lives.
Do these younger people have any idea what medicine will be like in another 30 years? Rather than having to be cut open again, I predict they won't have to be cut at all. It might be laser surgery or even micro-robots in their bloodstream fixing things.
I'm told that my own miraculous procedure wasn't available not that many years ago. I'd probably have died if I'd needed it then. So to all younger people: 2015 and 2045 (my centenary!) are universes apart medically. Think over your choice consciously, and then decide what's best for you. It may be the mechanical valve after all, but again, think consciously either way.