Mitral Valve Repair and Replacement

Mitral valve repair and mitral valve replacement are operations used when the valve between the left atrium and left ventricle is severely narrowed, leaky, or structurally damaged. Whenever possible, repair is often preferred because it preserves the patient’s own valve. Replacement becomes more likely when the valve cannot be repaired safely or durably. The decision depends on valve anatomy, symptoms, ventricular function, the cause of disease, and surgical expertise. ^[1][2][3]

Core concept of the approach

The mitral valve helps keep blood moving in the correct direction on the left side of the heart. When it leaks significantly, the heart may gradually enlarge and weaken; when it is stenotic, blood backs up into the lungs and left atrium. Surgery is not based only on symptoms. Echocardiographic findings, chamber size, pulmonary pressure, atrial fibrillation, and ventricular function all influence timing. In some patients, early surgery may be recommended before irreversible damage develops. ^[1][2][4]

Repair may involve leaflet reshaping, chordal repair or replacement, annuloplasty, or other techniques tailored to the lesion. Replacement means removing or bypassing the diseased valve and implanting a mechanical or bioprosthetic substitute. A mechanical valve is more durable but usually requires long-term anticoagulation. A bioprosthetic valve avoids some long-term anticoagulation issues but may degenerate over time. There is no universally “best” valve; the right choice depends on age, lifestyle, bleeding risk, pregnancy considerations, and long-term treatment preferences. ^[1][2][5]

Who may be eligible, and who may not be?

Patients with severe mitral regurgitation, severe mitral stenosis, progressive chamber enlargement, pulmonary hypertension, symptoms such as dyspnoea and fatigue, or complications such as atrial fibrillation may be considered for intervention. Some people may also be candidates for transcatheter approaches, depending on anatomy and surgical risk. Others need conventional surgery because of the complexity of the disease or the need for a durable repair. ^[1][2][3]

Patients often ask whether repair is always better than replacement. Repair is frequently preferred when feasible, especially in degenerative mitral regurgitation, because it preserves the native valve apparatus and may be associated with better long-term functional outcomes. However, forcing repair when the anatomy is unfavourable can be less wise than choosing a durable replacement. The goal is not to preserve the valve at any cost; it is to achieve the most reliable and safest long-term result. ^[1][2][4]

Process, expectations, and possible risks

Preoperative assessment usually includes detailed echocardiography and sometimes transoesophageal imaging, coronary evaluation, rhythm assessment, and review of overall surgical risk. The operation may be performed through a full sternotomy or, in selected centres and patients, minimally invasive access. Even with a smaller incision, it remains major heart surgery. ^[1][2][3]

Risks include bleeding, infection, arrhythmias, stroke, heart failure, prosthetic valve dysfunction, need for pacemaker, thromboembolism, anticoagulation-related bleeding, and rarely death. These risks vary with age, comorbidity, and the exact pathology. After surgery, long-term follow-up matters because valve performance, ventricular function, rhythm, and anticoagulation status may change over time. ^[1][2][5]

Recovery, follow-up, and when to seek help

Recovery differs by access route, age, and complications, but most patients need progressive rehabilitation and structured follow-up. Cardiac rehabilitation, wound care, rhythm monitoring, and medication review are all important. The meaning of “successful surgery” is not simply leaving the operating room; it also includes durable valve function, preserved ventricular performance, and safe adaptation to daily life. ^[1][2][4]

Urgent medical review is needed for worsening shortness of breath, fever, palpitations with dizziness, chest pain, fainting, wound infection signs, stroke-like symptoms, or bleeding complications—especially in patients using anticoagulants. Mitral valve surgery can substantially improve symptoms and prognosis in the right setting, but its benefits depend on careful timing and high-quality follow-up. ^[1][2][5]