Had my 2nd OHS in late April. Replaced both Aortic and Mitral. Got about 91/2 years, the mitral was shot with one leaf frozen. Essentially it wasn't working. Got Endocarditis 6 months earlier, which was cured, but did some damage to the valve, just never found out how much. In reflecting, I should've had the valve replaced in October of last year but I felt very good. The Surgery was terrible! For starters, my pulmonary pressure was some obscene number like 120, so we had to battle that, moving me from low risk to high risk. There were some cardiologist who thought I shouldn't have the surgery. I guess just let me die...Well the surgeon decided to operate anyway and I had a serious blood reaction from the transfusion. My lungs filled with fluid due to some reaction, and had to go on a machine I never heard of called and ECMO. Not sure how the blood transfusion went awry, I suppose I'll need a hemotologist and a lawyer to find the answers. I spend the next three days on the most extreme life-support there is and was basically dead for all practical and intent purposes. Somehow, I pulled through, which I don't understand how, and 11 weeks later, I am doing very well less some bed sores and some weird heart rhythm. In the end, I chose the bio valves based on the recommendation of the surgeon and the Cleveland clinic, that they would be replaced by a catheter in the future. Well, bcause of the MV, that didn't happen because it has not passed FDA. Interestingly enough, the hospital performed its very first MV, Valve in Valve, a week before my surgery. So the thinking is...these new valves (One Bovine, the other Porcine) and since I am theoretically calcifying less, these should last about 12 years(Im 60) and replaced both by catheter. So they say. In short...the second surgery was horrible, but I survived and doing pretty well. Not sure what happened during the blood transfusion, other than someones blood donation wasn't quite rigth. I suppose I need to action more on this. Lastly, Surgeons like tissue valves and love implanting them over mechanical s for better post operative results and chance of getting off blood thinners like coummadin. Scares the heck out of them. Hope this helps. Please reach out to me directly and I'll tell you more. Wish all the best of luck