Functional Mitral Stenosis After Mitral Valve Repair for Type II Dysfunction: Determinants and Impacts on Long-Term Outcome

The authors reviewed their experience with 602 patients who underwent mitral repair for type II mitral regurgitation. Mitral stenosis was defined as a mean transmitral pressure gradient (MTPG) of > 5 mm Hg, and 51 patients (8.5%) had mitral stenosis by this criterion. The authors found  on postoperative echocardiography that annuloplasty with a smaller-sized ring was associated with a higher MTPG, PA pressures, residual TR gradient, and incidence of new-onset atrial fibrillation.