Just found out that a co-worker of mine is having his mechanical aortic valve replaced next Friday. He will go in the hospital Monday to be taken off the coumadin and put on Heparin. He was a great source of help to me before my husbands valve replacement. I am trying to get more information. I know he has had his mechanical valve for 12 years and his wife said they have been trying to avoid the re-op for 15 months. I have not spoken to her personnally yet. I knew that he had been out of work a lot lately. We do not work in the same department just for the same county government. If I get more information I will let all of you know. My heart dropped when I heard his mechanical valve has to be replaced. I was so hoping that lifetime meant just that and now I am scared for my own husbands valve. But, I take comfort in knowing that they are able to re-operate to replace it.