Mitral valve surgery for chronic ischemic mitral regurgitation

Area of Science:

• Cardiovascular Surgery
• Cardiac Surgery
• Heart Valve Repair and Replacement

Background:

• Investigating early and midterm clinical outcomes of mitral valve (MV) surgery for chronic ischemic mitral regurgitation.
• Evaluating the efficacy of established criteria for MV repair versus replacement.

Purpose of the Study:

• To assess the validity of surgical criteria for mitral valve repair or replacement in chronic ischemic mitral regurgitation.
• To analyze clinical and echocardiographic results after MV surgery.

Main Methods:

• 102 patients with ischemic mitral regurgitation underwent MV surgery (82 repairs, 20 replacements) between 1988 and 2002.
• End-systolic distance (<=10 mm for repair, >10 mm for replacement) was the key decision factor.
• Comparison of preoperative characteristics between repair and replacement groups, including New York Heart Association class, ejection fraction, and end-diastolic volume.

Main Results:

• 30-day mortality was 3.9% (2.4% repair vs. 10.0% replacement; not significant).
• Five-year survival was 75.6% for repair and 66.0% for replacement (not significant).
• Of survivors, 76.3% were in New York Heart Association classes I and II; 50% of MV repairs had no or mild regurgitation.

Conclusions:

• Mitral valve surgery for chronic ischemic mitral regurgitation yields good 5-year survival rates.
• Over 75% of survivors achieve improved functional status (New York Heart Association class I or II).
• Both repair and replacement strategies are effective, with repair showing favorable functional outcomes.