Outcome after redo-mitral valve replacement in adult patients: a 10-year single-centre experience

The aim of this study was to investigate the overall outcome of adult patients undergoing redo-mitral valve replacement (redo-MVR) at our institution. Forty-nine patients (24 males) underwent redo-MVR with either bioprosthetic (n = 24) or mechanical valves (n = 25) between January 2000 and 2010. Median age of patients was 63 years (range 21-80 years), and the mean additive EuroSCORE was 12 +/- 4. Median time to re-operation was 8.2 +/- 6.6 years for first time redo-MVR and 6.4 +/- 5.6 years for second-time redo-MVR. Indications included prosthetic endocarditis (n = 22), para-prosthetic leak (n = 12), structural valve degeneration (n = 8), prosthetic valve thrombosis (n = 6) and malignancy (n = 1). The mean follow-up was 47.5 +/- 37.0 months (range 0.1-112.3 months). In-hospital mortality was 12% (n = 6). Mean hospital stay was 17 +/- 11 days (range 8-50 days). Actuarial survival at 1 and 5 years was 81 +/- 5% and 72 +/- 6%, respectively. Three patients required re-intervention: two for prosthetic valve endocarditis and one for para-prosthetic leak. Multivariate analysis showed that overall survival was associated with the LVEF < 50% (P < 0.001), concomitant AVR (P < 0.001) and urgent surgery (P = 0.03).