Mitral Regurgitation: A Comprehensive Guide
Medically reviewed by Andre Stone | MD, University of Pittsburgh School of Medicine on August 25th, 2026.
Published on April 6th, 2026. Updated on August 28th, 2026.
Key Takeaways
Mitral regurgitation occurs when the mitral valve doesn't close properly, causing blood to leak backward into the left atrium
Symptoms range from none in mild cases to severe shortness of breath and fatigue in advanced stages
Common causes include mitral valve prolapse, heart attack damage, and infections affecting the valve
Treatment depends on severity and can range from monitoring to surgical valve repair or replacement
Early detection and appropriate management may reduce the risk of complications such as heart failure.
Overview
Mitral regurgitation is a heart valve condition where the mitral valve doesn't close tightly. This allows blood to flow backward from the left ventricle into the left atrium when the heart contracts. The mitral valve sits between these two chambers on the left side of your heart.
This condition affects about 2% of the general population, making it one of the most common heart valve problems. It becomes more frequent with age, affecting up to 10% of people over 75 years old. The condition can develop gradually over many years or occur suddenly due to heart damage.
When mitral regurgitation is mild, many people live normal lives without symptoms. However, severe cases can lead to serious complications if left untreated. Understanding this condition helps you recognize symptoms early and seek appropriate care when needed.
Your doctor can usually detect mitral regurgitation during a routine heart exam. Once diagnosed, your healthcare team will create a plan to monitor or treat your condition. With proper care, most people with this condition can live full and active lives.
Symptoms & Signs
The symptoms of mitral regurgitation depend on how severe the condition is and how quickly it develops. Many people with mild regurgitation have no symptoms at all. When symptoms do appear, they usually develop gradually as the condition worsens.
Primary Symptoms
Shortness of breath - especially during physical activity or when lying flat
Fatigue and weakness - feeling tired even with light activities
Heart palpitations - feeling like your heart is racing or skipping beats
Chest discomfort - pressure or tightness in the chest area
Swelling in legs and feet - fluid buildup due to heart strain
Some people notice their symptoms only during exercise or stressful situations. Others may feel tired even when resting and doing simple daily tasks. If symptoms appear suddenly rather than gradually, this may indicate a more serious problem requiring immediate attention.
When to Seek Care
Contact your doctor if you experience new or worsening shortness of breath, especially during activities you could previously do without difficulty. Seek care if you develop chest pain, fainting spells, or notice your heart beating irregularly.
Let your doctor know if your shoes feel tighter or if your pants are snug around the ankles, as this could signal fluid retention. If you wake up gasping for air or feel very tired all the time, these are also signs to discuss with your healthcare provider.
When to Seek Immediate Care
Call 911 if you have severe chest pain, difficulty breathing at rest, or sudden onset of symptoms. These could indicate a medical emergency requiring immediate attention.
Causes & Risk Factors
Mitral regurgitation can result from problems with the valve leaflets themselves or the structures that support them. Mitral valve prolapse is a common cause, in which the valve leaflets bulge backward during heart contraction. Other common causes include changes in the heart's size or function that prevent an otherwise normal valve from closing properly. Heart attacks can damage the muscles that control the valve, leading to regurgitation.
Infections of the heart valves, called endocarditis, can destroy valve tissue and cause leakage. Rheumatic heart disease, though less common now, remains a significant cause in some parts of the world. Age-related wear and tear can also weaken the valve over time.
In some cases, the valve leaflets are normal but the structures holding them are damaged or stretched. This can happen from an enlarged heart or problems with the supporting muscles. Taking care of your overall heart health helps prevent the damage that can lead to mitral regurgitation.
Age
Risk increases with age as valve tissues naturally weaken
Genetics
Family history of heart valve disease or connective tissue disorders
Lifestyle
High blood pressure, smoking, and poor cardiovascular health
Other Conditions
Heart attack, endocarditis, rheumatic fever, or cardiomyopathy
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Diagnosis
Diagnosis
Medical History & Physical Examination
Your doctor will ask about your symptoms, family history of heart disease, and any previous heart problems. They'll listen to your heart with a stethoscope to detect a heart murmur, which is often the first sign of mitral regurgitation. The murmur sounds like a whooshing noise caused by blood flowing backward through the leaky valve.
During the physical exam, your doctor will check for signs of heart failure, such as swelling in your legs or fluid in your lungs. They may also check your blood pressure and pulse to assess your overall heart function.
Diagnostic Testing
Echocardiogram - uses sound waves to create detailed images of your heart and measure blood flow through the valve
Electrocardiogram (ECG) - records your heart's electrical activity to detect rhythm problems or signs of heart enlargement
Chest X-ray - shows the size and shape of your heart and can reveal fluid in the lungs
Cardiac catheterization - may be used in selected cases to measure pressures in the heart or examine the coronary arteries, especially when other test results are unclear or a procedure is being planned
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Treatment Options
Treatment for mitral regurgitation focuses on managing symptoms, preventing complications, and preserving heart function. The approach depends on the severity of your condition and whether you have symptoms.
Conservative Treatments
Medications may be prescribed for related problems or symptoms. Diuretics can help relieve fluid buildup, while other medicines may be used for heart failure, high blood pressure, an abnormal heart rhythm, or another specific indication. Blood thinners are not routinely needed for mitral regurgitation alone.
Regular monitoring - periodic echocardiograms and doctor visits to track progression
Lifestyle modifications - heart-healthy diet, regular exercise, and avoiding excessive salt intake
Blood pressure control - keeping blood pressure in normal range reduces strain on the heart
Advanced Treatments
Mitral valve repair - surgical procedure to fix the existing valve structure when possible
Mitral valve replacement - replacing the damaged valve with an artificial or biological valve when repair isn't feasible
Transcatheter procedures - minimally invasive valve repair or replacement options that may be appropriate for selected patients after evaluation by a heart-valve team
Your doctor will help you decide which treatment is best for your specific situation. The choice depends on how severe your regurgitation is and how well your heart is working. Regular follow-up visits help ensure your treatment is working effectively.
Living with the Condition
Daily Management Strategies
Monitor your symptoms daily and keep track of any changes in your energy level or breathing. Take prescribed medications as directed and maintain a low-sodium diet to reduce fluid retention. Stay up to date with regular medical appointments to track your condition's progression. Consistent monitoring helps identify changes and may help prevent complications.
Keep a symptom diary to show your doctor how you're feeling between appointments. This helps identify patterns and any worsening of symptoms. Sharing this information helps your doctor adjust your treatment plan if needed.
Exercise & Movement
Most people with mild mitral regurgitation can exercise normally, but those with severe cases may need activity restrictions. Ask your healthcare team what level of activity is safe for you. If exercise is approved, begin at the recommended intensity and watch for symptoms. Avoid sudden, intense physical exertion that could strain your heart. Always discuss exercise plans with your doctor before starting new activities.
Pay attention to how your body feels during and after exercise. Stop exercising if you develop shortness of breath, dizziness, chest discomfort, faintness, or palpitations, and contact your healthcare team for guidance. Seek emergency care for severe or persistent symptoms.
Prevention
Treat high blood pressure promptly to reduce strain on heart valves
Prevent infections that could damage heart valves by practicing good dental hygiene and taking antibiotics before certain procedures if recommended
Work with your healthcare team to manage other heart conditions and reduce the risk of additional heart damage
Follow up regularly with your healthcare provider for heart health screenings
Maintain a healthy lifestyle with a balanced diet, appropriate exercise, and no smoking
Maintain good oral health and receive dental care at intervals recommended by your dentist. Tell your dentist about your heart history, but note that mitral regurgitation alone usually does not require antibiotics before dental work. Preventing heart infections is much easier than treating valve damage caused by infection.
Frequently Asked Questions
Mild mitral regurgitation may remain stable for years without worsening. However, the condition typically doesn't improve without treatment. Regular monitoring helps track any changes in severity.
Mild cases are usually not life-threatening and many people live normal lives. Severe untreated mitral regurgitation can lead to heart failure and other serious complications over time.
Most people with mild regurgitation can exercise normally. Those with moderate to severe cases may need activity restrictions. Always consult your doctor before starting an exercise program.
Follow-up frequency depends on the severity, symptoms, heart size and function, and whether the condition is changing. Stable mild cases may be reassessed less often than yearly, while severe cases usually require closer monitoring on a schedule set by the cardiology team.
Limit sodium intake to reduce fluid retention and strain on your heart. Focus on a heart-healthy diet with fruits, vegetables, and lean proteins while avoiding processed foods high in salt.
Still have questions?
Consult with a healthcare professional for personalized advice about managing your specific case of mitral regurgitation.