This study is examining the use, safety and performance of an investigational, meaning not approved for commercial use or sale by the US Food and Drug Administration (FDA) device called Transcatheter Mitral Valve Replacement (TMVR). The TMVR is a device used to treat mitral valve disease in patients with heart failure (weakened heart muscle). The device is placed by a non surgical approach using a delivery catheter (hollow tube) placed in your blood vessel at the top of your leg and directed up to your heart. This five year study will include a screening process to determine you meet eligibility criteria. If you qualify you will then be seen for a baseline visit, undergo the procedure to place the device, day after procedure, at hospital discharge, 1,3,6, 12 months, then yearly for up to 5 years. Study related testing includes physical exams, medication review, 6 minute hall walk test, questionnaires, blood work, CT scans, electrocardiogram or ECG (recording of your heart's electrical activity) and echocardiogram (ultrasound test of your heart).

This research study is being done to evaluate a heart valve called the Navitor Transcatheter Aortic Valve, which may help treat people with severe aortic stenosis, a condition where the heart valve becomes too narrow to open properly. You are being asked to participate because your doctor believes you may benefit from a less-invasive valve replacement instead of open-heart surgery. The study will compare the Navitor valve to other FDA-approved transcatheter valves to see how safe and effective it is for people at low or intermediate surgical risk. The Navitor is considered investigational, meaning it is not yet approved in this population, by the Food and Drug Administration (FDA). Participation may last up to 10 years and involve up to 14 visits, some of which may be done remotely. If you join the study, you will have screening tests, the valve procedure, and regular follow-up visits for several years to check your heart health and how well the valve is working. The risks of participating are similar to those of standard transcatheter valve procedures, such as bleeding, stroke, heart rhythm changes, or infection. While you may experience symptom relief and improved heart function, personal benefit is not guaranteed. Your participation may also help improve future treatment options for patients with aortic stenosis.

This study is seeking subjects who have been diagnosed with and may be receiving medical treatment for mitral valve disease. The purpose of this registry is to collect data to better understand the progression of mitral valve disease and the effects of different treatments on the disease and patient health. If you agree to participate in this registry, your medical data will be collected including your medical history, certain background information, and certain test images/results. This registry will also collect information about current and future treatments for your mitral valve disease and data from future disease-related follow-up visits. Data will be collected for up to 24 months. There are no additional visits or any additional testing required for this registry.