What is the life expectancy of mitral stenosis?

Variable: Mitral stenosis can cause disabling heart failure in the 40s or lesser symptoms later in life. The disease is becoming quite uncommon in United States and is more often seen in patients born overseas. In cases detected early, and the valve is repaired or replaced, the life expectancy should be the same as a healthy patient of the same age.

Depends: Mitral stenosis caused by previous rheumatic fever typically continues to slowly worsen over time. Left untreated this is very serious and life threatening. It may 10-20 yrs or more to worsen to point of being a concern. Surgical treatment of mitral stenosis is available and effective. If treated at the appropriate time life expectancy should be normal.

Variable: Severe = short mild = normal the devil is in the details. (it's treatable so people don't die of MS like they used to).