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Eur J Cardiothorac Surg 2003;23:567-572
© 2003 Elsevier Science NL

Mitral annuloplasty in patients with ischemic versus dilated cardiomyopathy

^a Kerckhoff-Clinic Foundation, Benekestrasse 2-8, 61231 Bad Nauheim, Germany
^b Department of Cardiology, University Hospital, Rämistrasse 100, 8001 Zurich, Switzerland
^c Department of Cardiovascular Surgery, University Hospital, Rudolf-Buchheim-Strasse 7, 35385 Giessen, Germany

Received 25 September 2002; received in revised form 18 December 2002; accepted 20 December 2002.

^* Corresponding author. Tel.: +49-6032-996-0; fax: +49-6032-996-2567
e-mail: sza67{at}web.de

Objective: Mitral regurgitation is a frequent finding in patients with end-stage cardiomyopathy predicting poor survival. Conventional treatment consists medical treatment or cardiac transplantation. However, despite severely decreased left ventricular function, mitral annuloplasty may improve survival and reduce the need for allografts. Methods: From January 1996 to July 2002, 121 patients with severe end-stage dilated (DCM) or ischemic cardiomyopathy (ICM), mitral regurgitation 2, and left ventricular ejection fraction 30% underwent mitral valve annuloplasty using a flexible posterior ring. DCM was diagnosed in 30 patients (25%), whereas ICM was found in 91 patients (75%). Concomitant tricuspid valve repair was performed in 14 (46.6%) patients in the DCM, and in 11 (12%) in the ICM group (P=0.0001), coronary artery bypass grafting in three (10%) in the DCM, and in 78 patients (86%) in the ICM group (P<0.00001). The mean follow-up time was 567±74 days in the DCM and 793±63 days in the ICM group (ns). Results: Early mortality was 6.6% (8/121), and was equal for both groups. Improvement in NYHA class (DCM 3.3+0.1–1.8±0.16; ICM from 3.2+0.04 to 1.7±0.07) were equal between groups after 1 year. Seventeen (15%) late deaths occurred during the follow-up period. There was no difference in the 2-year actuarial survival between groups (DCM/ICM 0.93/0.85). Risk factors for mitral reconstruction failure, defined as regurgitation 2 after 1 year, were preoperative NYHA IV in the DCM group (P=0.03), a preoperative posterior infarction (P=0.025), decreased left ventricular function (P=0.043), larger ring size (P=0.026) and preoperative renal failure (P=0.05) in the ICM group. Risk factors for death were larger ring size (P=0.02) and an increased LVEDD (P=0.027) in the DCM group and the postoperative use of IABP (P=0.002), renal failure (P=0.001), and a larger preoperative LVESD (P=0.035) in the ICM group. Conclusion: Mitral reconstruction with a posterior annuloplasty using a flexible ring is effective in patients with severely depressed left ventricle function and has an acceptable operative mortality. Mid-term results are superior to medical treatment alone and comparable to cardiac transplantation.

Key Words: Mitral valve disease • Ischemic mitral regurgitation • Heart failure cardiomyopathy

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