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Background  Although mitral valve repair is at present the technique of choice in mitral regurgitation (MR) due to degenerative valve disease, long term results in patients with active mitral infective endocarditis (IE) are still under evaluation.    Methods  In the study were included 34 consecutive patients (22 males; mean age, 60 years; range 32–84 years) referred to our institution between January 1, 2005 to December 31, 2011 who were treated with valve repair for mitral valve (MV) active infective endocarditis. Eighteen patients underwent isolated MV repair. Aortic valve replacement and respectively repair were performed in 9 and 2 patients with concomitant aortic involvement. Blood cultures were positive in 30 (17 Staphylococcus, 13 Streptococcus, 1 g negative, 2 enterococcus).    Results  Four patients died during hospital stay (11%) due to multi system organ failure as a consequence of severe septic shock (2 patients), cardiogenic shock (1 case) and respiratory failure (1 patient). At an average follow up of 48 months in patients discharged alive from hospital survival was 96.7% (29 out of 30). None developed more than mild- to moderate mitral valve regurgitation during follow-up and we found a significant improvement in functional capacity and left ventricular ejection fraction associated with a significant decrease of pulmonary artery pressure. The only recurrence of endocarditis occurred in a drug addict patient.    Conclusions  Present investigation suggest that in patients with active mitral valve endocarditis MV repair, when technically feasible, is associated with a favorable clinical long term outcome. None of the patients alive at the end of follow-up developed severe mitral regurgitation. Moreover mortality and reinfection rate are uncommon and functional improvement.

Role of mitral valve repair in active infective endocarditis: long term results