Joey, your age allows you to be considered for either a mechanical valve or tissue. At different ages, there sometimes is a preference for one over the other. For example, young women who want to have children will often be given a tissue valve because the bleeding risks of coumadin are very high.
The main benefit to the tissue valve is that you do not have to take coumadin and you do not have to alter your lifestyle. Of course, it's always a good idea for us to take the opportunity to improve our eating habits and physical fitness, but tissue valves allow us to continue living as we always have.
For some of us less disciplined types, a tissue valve works well for us.
The down side is that these biological valves wear out pretty fast. In persons around your age, it is typical for them to last 15 and sometimes up to 20 years. Calcification of the valve is one of the main causes of these things wearing out. The older we get, the slower the calcification process. Younger people with tissue valves tend to wear them out after 10 years or so.
Although successful valve replacement surgery is far more common than it was 30 years ago, it is still serious stuff. Risks increase significantly with subsequent surgeries.
Mechanical valves usually last far longer. If you went this way, you likely would not require another surgery in your lifetime. I can't say from first hand experience, but there are more mechanical valve people here than tissue and there are very, very few who sound unhappy or concerned about their coumadin use.
My doctor originally painted coumadin as a very bad drug and influenced me heavily to go towards a tissue valve. In hindsight, I probably still would have, but it was a real eyeopener as to the influence of the surgeon on me.
Joey, the main thing is that no matter which valve you choose, you will enjoy a very full life, not much different than you do already.
Good luck with making your decision. It's not an easy one, but I always say listen to your instincts... it knows which alternative is best for you.
Kev