Treatment options for ischemic mitral regurgitation: A meta-analysis

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Cardiac Surgery

Background:

• Ischemic mitral regurgitation (IMR) treatment is evolving with new percutaneous and surgical techniques.
• Randomized clinical trials and matched studies are investigating these advanced IMR interventions.
• This study provides a comparative review of current IMR treatment strategies.

Purpose of the Study:

• To review and compare contemporary treatment options for ischemic mitral regurgitation (IMR).
• To evaluate the efficacy and safety of various IMR interventions.
• To inform clinical decision-making for IMR management.

Main Methods:

• A comprehensive literature search of electronic databases was performed.
• Meta-analysis included 12 articles meeting predefined inclusion criteria.
• Primary outcome was all-cause long-term mortality; secondary outcomes included mortality, rehospitalization, reoperation, and composite endpoints.

Main Results:

• MitraClip showed no significant benefit in mortality or hospitalization versus medical therapy for IMR.
• For moderate IMR, adding a mitral procedure to coronary artery bypass grafting yielded no clinical improvement.
• Mitral valve replacement had higher hospital mortality but lower reoperation/readmission rates than repair; subvalvular repair adjunct reduced adverse events.

Conclusions:

• MitraClip is not superior to medical therapy for improving IMR outcomes.
• Mitral valve replacement in moderate-to-severe IMR increases early mortality but lowers reoperation and readmission rates compared to annuloplasty repair.
• Adjunctive subvalvular procedures, while not showing isolated benefits, reduce major postoperative adverse events.