I have undergone mitralvave repacement 8years before, by a plastic valve st.jude,i am taking anticoagulant acinocoumarin 4mg and aspirin 150mg ,penicilllin 500mg daily .how long this valve will be functioning?another replacement need or not?now my age is 29.valve replacement done before 8 years.

You may need heart valve surgery for these reasons: Changes in your heart valve causes severe cardiac symptoms such as chest pain, shortness of breath, fainting or cardiac failure. Studies show that changes in your heart valve began to seriously affect your heart function. The doctor wants to replace or repair heart valves at the same time you have an open heart surgery for another reason. The heart valve has been damaged by an infection of the heart valves. You have received a new heart in the past, and it is not working well or if you have other problems like blood clots, infections or bleeding.