Hi nebtargh,
Aside from divine assurances from above, the thing that calmed my nerves the most was finding a surgeon I felt was competent and caring. The more research I did the more I felt empowered to make good decisions about my care. Ask questions. Keep a notebook. Write all your concerns down. This web site will be a great resource. YOu should breathe a sigh of relief in just having found it prior to surgery. Lastly, you live in a wonderful day and age where the quality of mechanicle and tissue valves are lasting longer and longer. The kind of tissue valve they are offering today are far superior to the valves of just teo or three years ago (so says my surgeon) I can only speak for tissue since that is the kind of valve I got. Technologies used in heart surgery keeps improving and mortality rates are low. You are not alone. Don't fret fellar!