BACKGROUND AND OBJECTIVE: Severe mitral valve regurgitation, which occurs primarily or secondary to various cardiovascular diseases, has undergone surgery and valve replacement and artificial valve insertion from several years ago. Within the last few years, severe mitral valve regurgitation has undergone repair surgery. This study was conducted to determine the results of mitral valve repair surgery. 
METHODS: This cross-sectional study was conducted among 210 patients who had undergone surgery with the diagnosis of severe mitral valve regurgitation. Transesophageal Echocardiography (TEE) was performed for all patients before surgery, and echocardiography was performed one week after surgery and six months later and the results were evaluated in terms of regurgitation in three mild, moderate and severe cases. 
FINDINGS: The mean age of patients with secondary mitral regurgitation was 43 – 85 years. In patients with secondary mitral regurgitation, 143 (83%) patients did not have mitral regurgitation, 27 (15%) patients had mild mitral regurgitation and 3 patients had moderate to severe mitral regurgitation, whereas in patients with primary mitral regurgitation, 30 (81%) patients did not have mitral regurgitation, 5 (14%) patients had mild mitral regurgitation and 2 (5%) patients had moderate to severe mitral regurgitation. 
CONCLUSION: The results of the study showed that mitral valve repair with primary or secondary etiology had good results and can replace artificial valve in the future.