The mitral valve plays a vital role in the heart’s ability to circulate blood effectively. Located between the left atrium and the left ventricle, it ensures blood flows in the correct direction during each heartbeat.
When the mitral valve becomes damaged or diseased, it may not close or open properly. This can lead to symptoms such as fatigue, breathlessness and reduced exercise tolerance. In more advanced cases, surgery may be recommended to restore normal valve function.
Understanding the difference between mitral valve repair and mitral valve replacement can help patients make informed decisions when discussing treatment with their cardiology team.
What Is Mitral Valve Disease?
Mitral valve disease typically occurs when the valve leaflets or supporting structures become weakened or distorted.
Two common problems include:
Mitral regurgitation
This occurs when the valve does not close tightly, allowing blood to leak backwards into the left atrium.
Mitral stenosis
This happens when the valve becomes narrowed, restricting blood flow between the chambers of the heart.
Both conditions can place additional strain on the heart and may eventually lead to symptoms or reduced cardiac function.
When Is Surgery Recommended?
Mitral valve surgery may be considered when:
- Symptoms interfere with daily activities
- The heart begins to show signs of strain or enlargement
- Imaging tests indicate progressive valve deterioration
- Medical therapy alone is not sufficient to control symptoms
The timing of surgery is carefully assessed by cardiologists and cardiac surgeons using echocardiography and other imaging tests.
Mitral Valve Repair
Mitral valve repair involves reconstructing the patient’s own valve so it can function normally again. Rather than removing the valve, the surgeon reshapes or stabilises the existing tissue.
Repair techniques may include:
- Reshaping valve leaflets
- Repairing supporting structures such as chordae
- Reinforcing the valve with a supportive ring
In experienced surgical centres, many mitral valves can be successfully repaired rather than replaced.
Preserving the patient’s own valve can maintain more natural heart function and may reduce the need for lifelong anticoagulation in some cases.
Mitral Valve Replacement
If the valve is severely damaged or unsuitable for repair, replacement may be recommended. During this procedure, the diseased valve is removed and replaced with a prosthetic valve.
Two types of replacement valves are commonly used:
Mechanical valves
Made from durable materials, these valves can last many years but usually require lifelong anticoagulant medication.
Biological valves
These are made from animal tissue and may not require lifelong anticoagulation, although they may wear out over time.
The choice of valve depends on factors such as age, lifestyle, and other medical conditions.
Minimally Invasive Mitral Valve Surgery
Traditional heart surgery often involves opening the breastbone to access the heart. However, advances in surgical techniques have made minimally invasive approaches possible in selected patients.
Minimally invasive mitral valve surgery may involve a small incision between the ribs, rather than a full sternotomy. This approach can allow surgeons to repair or replace the valve while minimising trauma to the chest wall.
Potential benefits may include:
- Smaller incisions
- Reduced post-operative discomfort
- Shorter hospital stays
- Faster return to normal activities
Suitability for minimally invasive surgery depends on individual anatomy and overall health.
Recovery After Mitral Valve Surgery
Recovery varies between individuals and depends on the type of surgery performed. Most patients spend several days in hospital following the procedure before continuing recovery at home.
During the recovery period, patients may participate in cardiac rehabilitation programmes designed to support safe return to activity.
Regular follow-up appointments are important to monitor heart function and ensure the valve repair or replacement is functioning well.
Individualised Care
Mitral valve disease can affect people in different ways. The decision between repair and replacement is based on a careful evaluation of the valve anatomy, overall heart function and patient preferences.
A detailed discussion with a cardiologist and cardiothoracic surgeon allows patients to understand the potential benefits and considerations of each option.