I have not posted before but am an ardent follower since reluctantly agreeing in February 2009 with my cardiologist and surgeon that AVR is now indicated. My surgery date is 1 July 2009 and I was talked into a bovine tissue valve (I am now 66) Carpentier-Edwards Perimount Magna. The usual bit about the dangers of warfarin in older persons. My choice all along was an On-X mechanical. I may still change my mind at the last minute and go mechanical and insist on the On-X but that would entail a change in surgeon and hospital with two weeks to go!! My question really is a tissue valve at my age a wise choice? Johan in Cape Town