This is a retrospective study of a total 70 patients underwent redo mitral valve surgery from 2010 to 2015 in Ibn Al Bitar Cardiac Center at Baghdad .the objectives of this research are to :Discuss the outcome of redo surgery in mitral valve, Assesses the causes of death for surgery in patients underwent a mitral valve redo surgery and Evaluation of the late outcomes after mitral valve surgery especially after open and closed valvotomy. The gender of our patients is 64% females and 36% males; the middle old age of the suffers at the redo surgery time was 39.6 years (ranged from 13-65 years). Previous mitral surgery was closed mitral commissurotomy (CMC) in 30 patients (42%), mitral valve replacement (MVR) in 20 patients (29%), opened commissurotomy of miral valve in 12 suffers (19%) while repair of mitral valve in 8 suffers (10%). Reoperative surgery included mitral valve replacement with mechanical valves St. Jude type in all suffers . The mean time to redo surgery was 15 years run between 6 months – 35 years. Surgical indication were valve restenosis after open type of commisurotomy & closed type of commisurotomy in 40 patients were restenosis of valve surface area of prosthesis in 10 patients, mitral regurgitation in 8 patients, infected endocarditis in 6 suffers and paravalvular leak in 6 suffers. An operative mortality was 14% (10 patients). We now have proven in this be trained that mitral valve reoperations can be done with a suitable death rate at surgery that compares nicely with results in other studies . rrowing, regurgitation or combined na may be illness Mitral valve -ntroduction:Ichronic, inherent, rheumatic, (regurgitation and stenosis). The etiology varies fromover of benefits variety to possess shown are . Reconstructionischemic neoplastic, and-best that equipment subvalvularvalve replacement, not least the preservation of However cases requiring perform, chamber on left result useful to possess knownor prosthetic bicuspid valve restenosis of as a result of reoperationrly and late risk, and ea contains a . Reoperation itselfincreasingar disfunction valve. .pathology chamber as a result ofthe persistent left satisfying essentially aren t resultsSeveral impacts such old age and NYHA class before valve surgery is the most