I just received a tissue valve at Cleveland Clinic and 57 years young. A. Marc Gillinov, MD, my surgeon stopped just short of a guarantee that I will receive a percutaneously placed aortic tissue valve replacement when the time comes due. Cleveland Clinic is in an active trial currently placing them in high-risk patients with huge success.
http://www.ncbi.nlm.nih.gov/pubmed/23410766
http://www.ncbi.nlm.nih.gov/pubmed/23410766