Perioperative outcome and long-term survival of surgery for acute post-infarction mitral regurgitation

Chevalier, Philippe; Burri, Haran; Fahrat, Fadi; Cucherat, Michel; Jegaden, Olivier; Obadia, Jean-François; Kirkorian, Gilbert; Touboul, Paul
August 2004
European Journal of Cardio-Thoracic Surgery;Aug2004, Vol. 26 Issue 2, p330
Academic Journal
Objective: To determine factors predictive of mortality in patients undergoing emergency mitral valve surgery in the setting of severe post-infarction regurgitation. Methods: Patients admitted for an acute myocardial infarction who required urgent mitral valve surgery for severe regurgitation were studied. Factors predictive of outcome were analysed. Results: Fifty-five consecutive patients (mean 65±10 years, 37 males) were included. The infarct was inferior in 31 patients, posterior in 10, anterior in 9 and lateral in 5. Thirty-four patients (62%) were in Killip class IV. Peroperative findings confirmed total papillary muscle rupture in 25 patients (posteromedial in 21, anterolateral in 4), and partial rupture in 12 patients (posteromedial in 10, anterolateral in 2). Papillary muscle dysfunction without rupture was responsible for regurgitation in 18 patients (posteromedial in 15, anterolateral in 3). The mitral valve was replaced by a prosthesis in all but 4 patients, who had valvuloplasty. Coronary angiography was done in 32 patients, of whom 18 underwent concomitant coronary artery bypass grafting and 2 balloon angioplasty. Surgery was performed on average 7 days after infarction. Thirteen patients (24%) died during the perioperative period. Absence of coronary revascularisation was significantly associated with increased perioperative mortality (34% vs. 9%, P=0.02). Of the 42 surviving patients, there were 5 deaths during a mean follow-up of 4.0±3.7 years. Conclusion: In patients with acute post-infarction mitral regurgitation, perioperative mortality is high, but can be improved with concomitant CABG in addition to valve surgery. Long-term outcome of survivors is favourable.


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