• Qiudong Chen, Amy Roach, Alfredo Trento, Georgina Rowe, George Gill, Achille Peiris, Dominic Emerson, Danny Ramzy, Natalia Egorova, Michael E Bowdish, and Joanna Chikwe.
• Department of Cardiac Surgery, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, Calif.
• J. Thorac. Cardiovasc. Surg. 2024 Mar 1; 167 (3): 944954.e6944-954.e6.

ObjectivesNational registry data show wide variability in degenerative mitral repair rates and infrequent use of intraoperative repair revision to eliminate residual mitral regurgitation (MR). The consequence of uncorrected mild residual MR is also not clear. We identified factors associated with intraoperative revision of degenerative mitral repair and evaluated long-term effects of intraoperative mild residual MR.MethodsA prospective institutional registry of 858 patients with degenerative MR undergoing robotic mitral surgery was linked to statewide databases. Univariate logistic regression identified factors associated with intraoperative repair revision. Survival was estimated using the Kaplan-Meier method and adjusted with Cox regression. Late freedom from more-than-moderate MR or reintervention was estimated with death as a competing risk.ResultsRepair rate was 99.3%. Repair was revised intraoperatively in 19 patients and was associated with anterior or bileaflet prolapse, adjunctive repair techniques, and annuloplasty band size (all P < .05). Intraoperative repair revision did not result in increased postoperative complications. Intraoperative mild residual MR (n = 111) was independently associated with inferior 8-year survival (hazard ratio, 2.97; 95% CI, 1.33-6.23), worse freedom from more than moderate MR (hazard ratio, 3.35; 95% CI, 1.60-7.00), and worse freedom from mitral reintervention (hazard ratio, 6.40; 95% CI, 2.19-18.72) (all P < .01).ConclusionsA near 100% repair rate with acceptable durability may be achieved safely with intraoperative revision of postrepair residual MR. Mild residual MR was independently associated with reduced survival, worse freedom from more-than-moderate MR, and worse freedom from mitral reintervention at 8-year follow-up.Copyright © 2022. Published by Elsevier Inc.

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