Study on Safety and Performance of Medtentia Mitral Valve Repair System in Surgical Repair of Mitral Regurgitation

Inclusion criteria: Eligible patients must meet all the following inclusion criteria: 1. Signed Informed Consent Form. 2. Male or female aged ≥18 to ≤ 85 years on the day of screening. Females of childbearing potential (not surgically sterilized or more than one year post-menopausal) must have a negative pregnancy test (serum beta-human chorionic gonadotropin (beta-hCG) or urine) within 24 hours prior to mitral valve surgery. 3. Patient must meet one of the following indications for mitral repair surgery according to the European Society of Cardiology (ESC) and the American Heart Association (AHA) guidelines, and must have consented to have such surgery before undergoing the informed consent process for this study. * Symptomatic patient with chronic severe primary mitral regurgitation (MR), left ventricle ejection fraction (LVEF) \> 30% and left ventricle end systolic diameter (LVESD) \< 55 mm or * Asymptomatic patient with chronic severe primary MR who either: * Has LV dysfunction (LVEF ≤ 60 % and/or LVESD ≥ 40 mm or * Has a preserved LV function (LVEF\> 60% and LVESD \< 40 mm) together with a likelihood of a successful and durable repair of \> 95 % and an expected mortality rate of \< 1% or * Has a flail leaflet and LVESD ≥ 40 mm together with a high likelihood of durable repair and a low surgical risk or * Has a new onset of atrial fibrillation or pulmonary hypertension (systolic pulmonary pressure \> 50 mm Hg at rest) or * Asymptomatic patient with chronic moderate or severe primary MR who is to undergo cardiac surgery for another indication when the mitral valve (MV) repair can be performed concomitantly * Patient with chronic severe or moderate secondary MR and an LVEF \> 30 % who is undergoing CABG concomitantly 4. Patient must have a life expectancy of more than 24 months at the time of screening, assuming they undergo mitral valve annuloplasty. 5. Patient must have a mitral valve diameter corresponding to MAR size 26 - 40 and leaflet thickness (smallest helix height - largest helix height) for which an appropriate MAR ring is available. 6. Patient must be able and willing to attend all scheduled visits and comply with all study procedures. Exclusion criteria: Eligible patients must not meet any of the following exclusion criteria: 1. Have had previous cardiac surgery, including but not limited to any of the following: minimally invasive surgery, mitral valve surgery or valvuloplasty, implantation of a prosthetic heart valve or cardiac defibrillator. 2. Have ejection fraction below 30%. 3. Plan to have any concomitant cardiac surgery or procedure other than CABG, tricuspid valve repair, correction of atrial septal defect, closure of auricular appendage, correction of patent foramen ovale and/or ablation therapy for correction of atrial fibrillation performed with the mitral valve repair, which may also include leaflet resection and chordae replacement. 4. Have any structural hindrance or heart abnormality that would make use of the MAR technically infeasible, such as a mitral valve of an unusual size or leaflet thickness for which a suitable MAR is not available, or an obstruction or other abnormality that blocks positioning of the MAR. (Final determination to be made during surgery). 5. Show evidence of having had an acute myocardial infarction (MI) within the 30 days preceding the mitral valve repair surgery. 6. Have a history of stroke within the preceding 12 months or have had any stroke that is not completely clinically resolved and/or significant carotid artery disease (subjects with carotid stenosis ≥50% and/or ulceration). 7. Have recent or evolving bacterial endocarditis or be undergoing antibiotic therapy. 8. Have restricted mobility of the mitral apparatus that results in a valvular area less than 3.0 cm2. 9. Be in need of annular decalcification. 10. Have any comorbidities or conditions that would be a contraindication to open heart surgery or that would place the patient at an unacceptable surgical risk, such as: severe chronic obstructive pulmonary disease (COPD); hepatic failure; immunosuppressive abnormalities or other immunological deficiencies including being immunocompromised or having an autoimmune disease; chronic renal failure requiring dialysis; hematological abnormalities including a history of bleeding diathesis or coagulopathy; being unable to follow the locally recommended anticoagulant regimen; an intolerance or hypersensitivity to anesthetics; cancer that requires further radiation, chemotherapy or surgical treatment. 11. Have a contraindication to trans-esophageal echocardiography (TEE)/ Doppler. 12. Have any recent psychiatric disorder, including drug or alcohol abuse, that in the Investigator's opinion could impair the patient's compliance with study procedures. 13. Be currently or have in the preceding 30 days participated in any other study involving an investigational drug or device. 14. Be an employee of the investigational site directly affiliated with this study, the sponsor or the clinical research organization or have an immediate family member who is.