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Ann Thorac Surg 2007;84:750-758
© 2007 The Society of Thoracic Surgeons

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Original Articles: Cardiovascular

A Change in Perspective: Results for Ischemic Mitral Valve Repair Are Similar to Mitral Valve Repair for Degenerative Disease

^a Department of Surgery, University of Virginia, Charlottesville, Virginia
^b Department of Internal Medicine, University of Virginia, Charlottesville, Virginia

Accepted for publication April 23, 2007.

^_* Address correspondence to Dr Gazoni, Department of Surgery, University of Virginia Health System, Charlottesville, VA 22908 (Email: lmg2x{at}virginia.edu).

Presented at the Forty-third Annual Meeting of The Society of Thoracic Surgeons, San Diego, CA, Jan 29–31, 2007.

Background: Although the benefits of mitral valve repair for degenerative disease are well established, many consider surgery for functional ischemic mitral regurgitation (MR) less amenable to operative treatment. We hypothesized that mitral valve repair for ischemic MR results in outcomes similar to those for mitral valve repair for degenerative MR.

Methods: Retrospective review of nonemergent mitral valve repairs for an 8-year period revealed 105 patients with functional ischemic MR, of whom 39 were treated for severe tethering (ischemic group), and 245 patients with degenerative MR (degenerative group).

Results: Patients in the ischemic group had more comorbidities (p < 0.01) and worse preoperative left ventricular dysfunction (ejection fraction 0.29) compared with patients in the degenerative group; (ischemic, 37.1% [39 of 105] versus degenerative, 2.0% [5 of 245]; p < 0.01). Immediate postrepair transesophageal echocardiogram revealed a 0 to 1+ MR in all patients in both groups (not significant). The hospital mortality rate was 1.9% (2 of 105) in the ischemic group and 1.2% (3 of 245) in the degenerative group (p = 1.00). The 5-year survival rate was 83.9% in the ischemic group and 94.3% in the degenerative group (p < 0.01). Five-year freedom from reoperation for recurrent MR was 100% and 97.5% in the ischemic and degenerative groups, respectively (p = 0.14). Postoperative renal failure and stroke rates were similar between both groups (not significant). The incidence of moderate or greater MR after more than 1 year of follow-up was similar between groups (not significant).

Conclusions: Despite the multiple comorbidities that afflict patients with ischemic MR, mitral valve repair for ischemic and degenerative disease produces comparable and satisfactory outcomes. An aggressive approach to repair of functional ischemic MR, including treatment of tethering, leads to durable results.

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