Surgical Implantation of TRAnscatheter vaLve in Native Mitral Annular Calcification (SITRAL) Study

Inclusion Criteria: * Subject has severe native mitral annular calcification associated with mitral stenosis and/or regurgitation. Qualifying echo must be within 60 days of the date of the procedure. * Subject has a clinical indication for mitral valve replacement, as demonstrated by reported New York Heart Association (NYHA) Functional Class II or greater. * The subject is at least 22 years old. * The Heart Team agrees that the subject is high risk or inoperable for surgical mitral valve repair or replacement (MVR), based on a conclusion that the probability of death or serious, irreversible morbidity exceeds the probability of meaningful improvement. The following concomitant procedures, are allowed: Maze, Tricuspid Valve Procedures (TVP), and Atrial Fibrillation (AF) ablation, coronary artery bypass grafting and septal myectomy. * The study subject has been informed of the nature of the study, agrees to its provisions and has provided written informed consent as approved by the Institutional Review Board (IRB) of the respective clinical site. * The study subject agrees to comply with all required post-procedure follow-up visits Exclusion Criteria: * Evidence of an acute myocardial infarction (MI) ≤ 30 days before the intended treatment \[defined as: Q wave MI, or non-Q wave MI with total creatine kinase (CK) elevation of creatine kinase-myocardial band (CK-MB) ≥ twice normal in the presence of myocardial band (MB) elevation and/or troponin level elevation (WHO definitio…