My 63 yr old mother needs to have an AVR and possible MVR. She is in general good health. Lipidema, hypothroid, no CAD good EF. She has beed given choices of mechanical, pig and also human. (I'm unsure if this is her pulmonic or a cadaver, I think a cadaver.) It seems difficult to choose any of these. They all seem to have their share of pros and cons. Could you please give me some insight and me more info. on the pros and cons of a cadaver valve.