Mitral Regurgitation: Understanding a Leaking Mitral Valve and What Happens Next
What patients and families need to know when a scan or clinician mentions mitral regurgitation.
Important: Severe breathlessness, chest pain, fainting, or a sudden deterioration needs urgent medical assessment.
What does “mitral regurgitation” mean?
The mitral valve sits between the heart’s left upper and lower chambers. It should allow blood to move forward, then close firmly. In mitral regurgitation, the valve does not close fully and some blood leaks backward. A small leak can be common and may need only observation. A more important leak can make the heart work harder over time.
What can cause it?
Causes include changes in the valve leaflets or their supporting structures, enlargement of the heart, previous heart damage, infection, or conditions present from birth. The cause matters because it helps the team decide whether monitoring, medicines, repair, or replacement is appropriate.
Possible symptoms
- Breathlessness, especially during activity or when lying flat
- Tiredness or reduced exercise tolerance
- Palpitations or an irregular heartbeat
- Swelling in the ankles, feet, or abdomen
- Sometimes, no symptoms at all
These symptoms can have many causes. Their presence does not prove that the valve is the cause, but it is important to report them.
How is it assessed?
An echocardiogram is the main test. It helps show the severity and cause of leakage, heart chamber size, and heart function. A clinical examination, ECG, blood tests, CT or MRI, or other tests may be used when needed. Follow-up scans are often important because symptoms and scan findings can change over time.
What happens next?
Some people need regular monitoring. Others may need treatment for related problems, such as fluid retention or irregular rhythm. If the leak is severe or is affecting the heart, a specialist team may discuss valve repair or replacement. For suitable patients, a catheter-based repair may also be considered. The best timing depends on symptoms, heart function, the cause of the leak, and the whole clinical picture.
Questions to ask
- How severe is the leak, and what is causing it?
- Has the leak affected the size or pumping of my heart?
- How often should I have an echo?
- What symptoms should prompt an earlier review?
- Would repair, replacement, or a catheter procedure ever be relevant for me?
Key message: A leaking mitral valve does not automatically mean surgery. Accurate imaging, regular follow-up, and a conversation about the cause are central to good care.