Predicting functional mitral stenosis after restrictive annuloplasty for ischemic mitral regurgitation

Area of Science:

• Cardiology
• Cardiac Surgery
• Cardiovascular Research

Background:

• Restrictive mitral valve annuloplasty (MVA) for chronic ischemic mitral regurgitation (CIMR) may cause functional mitral stenosis (MS).
• Predicting clinically significant MS after MVA remains challenging.

Purpose of the Study:

• Identify risk factors for developing clinically significant functional MS post-MVA surgery.
• Improve patient outcomes by predicting MS after CIMR treatment.

Main Methods:

• Retrospective review of 114 patients undergoing MVA with coronary artery bypass grafting (CABG) for CIMR.
• Definition of clinically significant functional MS: resting transmitral peak pressure gradient (PPG) ≥ 13 mmHg.

Main Results:

• 24.56% of patients developed clinically significant functional MS during 6-12 months follow-up.
• Higher PPG at follow-up compared to early postoperative stage (p < 0.001).
• Annuloplasty size ≤ 27 mm and early postoperative PPG ≥ 7.4 mmHg predicted MS.

Conclusions:

• Restrictive MVA and CABG for CIMR can lead to significant postoperative PPG increases.
• Annuloplasty size and early PPG are reliable predictors of functional MS development.