One year ago I had aortic heart valve replacement due to bicuspid aortic valve. I have a pigs valve and was tolds to expect it to last 15 - 20 years. Last week I had a TEE test and was told that my valve is already starting to narrow
significantly. What would cause this to happen? I am 58 years old, I am in good health, 5'4 and 140 pounds. I walk on my treadmill for at least 30 minutes everyother day. My blood pressure is under control.