This study aimed to compare the efficacy of isolated coronary artery bypass grafting and coronary artery bypass grafting + mitral valve repair in moderate ischemic mitral regurgitation patients through a cohort and explore the potential risk factors of the clinical outcomes.

Inclusion Criteria:

1. Adult coronary artery disease patients complicated with moderate ischemic mitral regurgitation.
2. undergoing coronary artery bypass grafting with or without mitral valve repair.

Exclusion Criteria:

1. patients under the age of 18 years,
2. patients complicated with more than moderate ischemic mitral regurgitation or undergoing mitral valve replacement,
3. patients complicated with primary mitral valve disease other than ischemic mitral regurgitation, such as rheumatic mitral regurgitation or mitral valve leaflet prolapse,
4. patients undergoing concomitant aortic valve procedure.

adult coronary artery disease patients complicated with moderate ischemic mitral regurgitation undergoing coronary artery bypass grafting with or without mitral valve repair from August 2009 to August 2023 were enrolled