Interesting question. Searching through the 2022 Guide for Aviation Medical Examiners only shows hits on "regurgitation" for mitral valve replacement or repair, and it looks like there is a five-year dividing line.
Notes:
*Co-morbid conditions for FAA purposes include:
Cardiac disease (disease of other valves, ischemia, CHF, Left Ventricular Systolic Dysfunction (LVSD), Secondary or Functional mitral valve disease, arrhythmia, etc.);
Connective tissue disorder (such as Marfan’s or Ehlers-Danlos, etc.);
Coumadin or other anticoagulation (other than ASA) due to a cardiac condition;
Lung disease such as COPD (considered moderate to severe; any FEV1 or FVC less than 70%) or Pulmonary Hypertension; or
Residual Mitral valve regurgitation listed as moderate or higher on cardiac echo.
Parse the CACI for Mitral Valve repair.
Definitely time to talk to an AME that specializes in difficult cases!