Heart Valve Replacement Surgery

Introduction

If your doctor has told you that one of your heart valves is severely narrowed, leaking, or damaged, you may be facing a decision about heart valve replacement surgery. This is one of the most established operations in modern cardiac care, and for many people it relieves long-standing symptoms such as breathlessness, fatigue, and chest discomfort, while protecting the heart from further strain.

This guide is written for patients who already know that valve disease is part of their picture — perhaps after an echocardiogram, a hospital admission, or a referral to a cardiac surgeon. It explains what valve replacement involves, the different types of replacement valves, the surgical and catheter-based approaches in use today, what recovery typically looks like, and what life can be like in the months and years afterwards.

Decisions about valve surgery are personal and clinical. The aim here is to give you a clear, balanced picture so that conversations with your heart team feel less overwhelming and more productive.

What Is Heart Valve Replacement Surgery?

The heart has four valves: the aortic, mitral, tricuspid, and pulmonary valves. Each one acts like a one-way door, opening to let blood flow forward and closing to stop it from flowing backward. When a valve is diseased, it may not open fully (called stenosis) or may not close properly (called regurgitation, or a leaking valve). Over time, this forces the heart to work harder and can lead to heart failure, abnormal heart rhythms, or other complications.

The four heart valves and their positions: ① aortic valve, ② mitral valve, ③ tricuspid valve, ④ pulmonary valve.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Heart valve replacement surgery is a procedure in which the diseased valve is removed (or, in catheter-based approaches, pushed aside) and a new valve is implanted in its place. The new valve restores normal one-way blood flow through the heart.

The most commonly replaced valves are the aortic valve and the mitral valve. The tricuspid and pulmonary valves are replaced less often, but the same principles apply.

Replacement is one option among several. In many cases — particularly with mitral valve disease — doctors first consider whether the valve can be repaired rather than replaced. The choice depends on which valve is affected, the nature of the damage, your age and other health conditions, and the experience of the heart team.

Why Is Heart Valve Replacement Performed?

Heart valve replacement is performed when valve disease has reached a stage where the risks of leaving it untreated outweigh the risks of surgery. Current guidelines from the American Heart Association and American College of Cardiology (AHA/ACC), and the European Society of Cardiology together with the European Association for Cardio-Thoracic Surgery (ESC/EACTS), describe several situations in which intervention is typically considered.

Severe Aortic Stenosis

The aortic valve becomes narrowed and stiff, often due to age-related calcium build-up, a bicuspid (two-leaflet) valve from birth, or, in some parts of the world, rheumatic heart disease. Once aortic stenosis becomes severe and causes symptoms such as breathlessness on exertion, chest pain, dizziness, or fainting, major guidelines support proceeding with valve replacement, because outcomes without treatment are poor.

Severe Aortic Regurgitation

The aortic valve does not close properly, allowing blood to leak backward into the heart. Surgery is generally considered when symptoms develop or when imaging shows that the heart is starting to enlarge or weaken, even before symptoms appear.

Severe Mitral Valve Disease

Mitral stenosis (often a long-term consequence of rheumatic heart disease) and severe mitral regurgitation (from prolapse, degenerative changes, or damage from a heart attack) may require intervention. Where possible, surgeons prefer to repair the mitral valve rather than replace it, because long-term outcomes after repair are often favourable. Replacement is used when repair is not feasible.

Tricuspid or Pulmonary Valve Disease

These valves are replaced less commonly. Tricuspid valve replacement may be needed in advanced regurgitation or in certain congenital conditions. Pulmonary valve replacement is more often performed in people with congenital heart disease, sometimes years after an earlier childhood operation.

Infective Endocarditis

A valve infection (endocarditis) can destroy valve tissue. When infection causes severe valve damage, heart failure, abscesses, or repeated embolic events, surgery may be needed even during active infection.

Failure of a Previously Implanted Valve

Biological valves and even mechanical valves can develop problems over time. A previously implanted valve that has become narrowed, leaking, or infected may itself need to be replaced.

Who Is a Candidate?

Suitability for valve replacement is not decided by any single test. Cardiac centres use a heart team approach, in which cardiologists, cardiac surgeons, imaging specialists, and anaesthetists review your case together. The team considers:

• Which valve is affected and how severely
• Whether symptoms are present, and how much they limit daily activity
• Heart function on echocardiography (especially the pumping strength of the left ventricle)
• The condition of the other valves and the coronary arteries
• Other medical conditions such as kidney disease, lung disease, diabetes, or previous strokes
• Age and overall fitness, which affect both the choice of approach and the choice of valve
• Your own preferences and priorities

Some people are not good candidates for traditional open-heart surgery because of frailty or other serious illnesses. For these patients, catheter-based options such as transcatheter aortic valve implantation (TAVI, also called TAVR) may be considered. Others are clear candidates for surgery and benefit from a more durable surgical repair or replacement. The heart team weighs these factors together with you.

Alternatives to Valve Replacement

Replacement is not always the first or only option. Depending on the valve and the cause of disease, several alternatives may be considered.

Valve Repair

Where the valve structure can be preserved, surgeons may repair it instead of replacing it. This is particularly true for mitral valve regurgitation due to prolapse, where techniques such as resecting damaged tissue, repairing chords, and placing an annuloplasty ring can restore valve function. Repair generally avoids long-term anticoagulation and tends to preserve heart function well. Major societies favour repair over replacement for the mitral valve whenever it is technically feasible and likely to be durable.

Medical Therapy

Medications cannot reverse a damaged valve, but they can help manage symptoms and slow the strain on the heart in earlier stages of disease, or when surgery is not yet indicated. These may include drugs to control blood pressure, heart failure medications, rhythm control medications, and treatments for associated conditions.

Balloon Valvuloplasty

In selected patients with mitral stenosis from rheumatic heart disease, a balloon catheter can be used to stretch open the narrowed valve. This is more commonly used in younger patients with suitable valve anatomy. Balloon valvuloplasty of the aortic valve is sometimes used as a temporary measure, but does not provide lasting benefit in most adults.

Transcatheter Valve Repair

For some patients with severe mitral regurgitation who are at high surgical risk, catheter-based repair devices that clip the valve leaflets together can reduce leakage. This is a different procedure from valve replacement but addresses similar problems.

Watchful Waiting

If valve disease is moderate and not causing symptoms or strain on the heart, the heart team may recommend regular monitoring with echocardiograms rather than immediate surgery. The right time to operate is a clinical judgement based on how the valve and the heart change over time.

Surgical Approaches

Heart valve replacement is no longer a single operation. Several approaches exist, and the right one for an individual depends on which valve is affected, the underlying anatomy, overall health, and the experience of the surgical centre.

Traditional Open-Heart Surgery (Median Sternotomy)

This is the most established approach and remains the standard for many valve operations. The surgeon makes a vertical incision down the centre of the chest and divides the breastbone (sternum) to reach the heart. During the operation:

• A heart-lung machine (cardiopulmonary bypass) takes over the work of the heart and lungs
• The heart is temporarily stopped so the surgeon can work in a still, bloodless field
• The diseased valve is removed and the new valve is sewn into place
• The heart is restarted, bypass is weaned, and the breastbone is closed with strong wires

Open surgery gives the surgeon excellent access and is suitable for almost any valve operation, including complex cases, multiple valve surgery, or when valve surgery is combined with coronary artery bypass grafting (CABG).

Minimally Invasive Valve Surgery

In selected patients, valve surgery can be performed through smaller incisions — for example, a small cut between the ribs on the right side for mitral valve operations, or a partial upper sternotomy for aortic valve operations. The heart is still stopped and the heart-lung machine is still used, but the smaller incision can mean less post-operative pain, less visible scarring, and sometimes faster early recovery.

Minimally invasive surgery is not suitable for everyone. Anatomy, previous surgery, and the complexity of the valve problem all influence whether this approach is appropriate.

Transcatheter Aortic Valve Implantation (TAVI / TAVR)

TAVI, also called TAVR, is a catheter-based approach to replacing the aortic valve without opening the chest. A new valve, mounted inside a collapsed stent, is delivered through a blood vessel — most often the femoral artery in the groin — and positioned inside the diseased aortic valve. When deployed, the new valve pushes the old leaflets aside and starts working immediately.

The TAVI procedure showing: ① femoral artery access in the upper leg, ② catheter advancing through the aorta, ③ collapsed valve stent approaching the diseased aortic position, ④ deployed valve expanding inside the native aortic valve.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

TAVI was first developed for patients who were too high-risk for traditional surgery. As evidence has grown, indications have expanded. Current AHA/ACC and ESC/EACTS guidance describes TAVI as a reasonable option for many patients with severe symptomatic aortic stenosis, particularly older patients and those at intermediate or higher surgical risk. For younger, lower-risk patients with suitable anatomy, surgical aortic valve replacement remains an important option, and the choice is made by the heart team after weighing factors such as anatomy, expected valve durability, and lifestyle.

Other Transcatheter Valve Procedures

Transcatheter approaches are also used for some patients with disease of the mitral, tricuspid, or pulmonary valves. Transcatheter pulmonary valve replacement is increasingly used in adults with congenital heart disease who previously had pulmonary valve surgery in childhood. Transcatheter mitral and tricuspid valve technologies are evolving and are typically reserved for patients who are high-risk for conventional surgery.

Valve-in-Valve Procedures

When a previously implanted biological valve wears out, it may sometimes be possible to place a new transcatheter valve inside it, avoiding repeat open surgery. This is called a valve-in-valve procedure. Suitability depends on the original valve type and size and the patient's anatomy.

Mechanical Versus Tissue (Biological) Valves

Side-by-side comparison of the two main valve types: ① mechanical valve with rigid carbon leaflets, ② tissue (biological) valve with flexible animal-tissue leaflets mounted on a frame.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Mechanical Valves

Mechanical valves are made from durable materials such as pyrolytic carbon and titanium. Their main features are:

• Very long-lasting — they are designed to last for decades and rarely need replacement because of wear
• Require lifelong anticoagulation with warfarin, because blood can otherwise form clots on the valve surface
• Need regular blood tests (INR monitoring) to keep the level of anticoagulation in a safe range
• May cause a faint clicking sound, which most people stop noticing over time

Because of their durability, mechanical valves are often considered for younger patients who would otherwise face the prospect of repeat surgery if a tissue valve wore out. The trade-off is the lifelong need for warfarin and the lifestyle adjustments that come with it.

Tissue (Biological) Valves

Tissue valves are made from animal valve or pericardial tissue (most often bovine or porcine), specially treated and mounted on a frame. Donor human valves (homografts) are used in selected situations. Their main features are:

• Do not usually require lifelong anticoagulation, although short-term blood thinners or aspirin may be used after surgery
• Have a limited lifespan, typically lasting many years but eventually wearing out; younger patients tend to wear them out faster
• If they fail later in life, a valve-in-valve transcatheter procedure may be possible, avoiding a repeat open operation in some cases

Tissue valves are often considered for older patients, for women who may wish to become pregnant (where warfarin poses particular concerns), and for people who cannot safely take long-term anticoagulation. Both AHA/ACC and ESC/EACTS guidelines describe the choice as a shared decision, with the patient's age, lifestyle, ability to take warfarin, other health conditions, and personal preferences all playing a role.

Other Valve Types

In specific situations, surgeons may use a homograft (a human donor valve) or perform a Ross procedure, in which the patient's own pulmonary valve is moved into the aortic position and a homograft is placed in the pulmonary position. These options are used selectively, often in younger patients or those with endocarditis, at centres with the required experience.

Preparing for Heart Valve Replacement Surgery

Preparation usually begins several weeks before the operation and helps reduce risk and make recovery smoother.

Tests and Assessments

Most patients undergo:

• Echocardiography (transthoracic and sometimes transoesophageal) to map the valve in detail
• ECG to look at the heart's rhythm
• Chest X-ray and often a CT scan, especially before TAVI, to plan access routes
• Coronary angiography to check whether the coronary arteries also need attention — this matters because valve surgery and bypass surgery can often be combined in one operation
• Blood tests for haemoglobin, kidney and liver function, clotting, and infection markers
• Dental review in selected cases, because untreated dental infections can be a source of bacteria reaching the new valve

Medication Review

The team will review all medications. Blood thinners and antiplatelet drugs may need to be paused or adjusted under medical supervision. Diabetes, blood pressure, and other long-term medications are usually optimised before surgery. Do not stop or change any medication on your own — always follow the team's specific instructions.

Lifestyle Preparation

Stopping smoking, even a few weeks before surgery, lowers the risk of lung and wound complications. Good nutrition and gentle physical activity (within what your heart allows) help recovery. If you are overweight, your team may discuss weight management; if you are underweight or losing weight unintentionally, a dietitian may be involved.

Emotional Preparation

It is normal to feel anxious before heart surgery. Knowing what to expect — the ICU environment, the breathing tube, the drains, the timeline of getting out of bed — tends to reduce fear. Talking to your family, asking the team specific questions, and meeting the cardiac rehabilitation team in advance can all help.

What Happens During Heart Valve Replacement Surgery

The exact steps depend on the approach, but the overall pattern of an open valve replacement is broadly as follows.

Anaesthesia and Monitoring

You are given a general anaesthetic so you are asleep and pain-free throughout the operation. A breathing tube is inserted, and various lines and monitors are placed to watch your heart, blood pressure, oxygen levels, and other functions during and after surgery.

The Operation

1. The surgeon makes the chosen incision — a sternotomy or a smaller minimally invasive cut.
2. You are connected to the heart-lung machine, which takes over the work of pumping and oxygenating your blood.
3. The heart is temporarily stopped using a special protective solution.
4. The surgeon opens the heart or great vessel above it (depending on which valve is being treated) and inspects the valve.
5. The diseased valve is carefully removed.
6. The new valve — mechanical or tissue — is sewn into place with very fine sutures.
7. The heart is closed, the heart-lung machine is gradually weaned off, and the heart is restarted, often with a brief use of temporary pacing wires.
8. The team checks that the new valve is working well, usually with a transoesophageal echocardiogram performed during surgery.
9. Drainage tubes are placed, and the chest is closed in layers; the breastbone is held together with strong wires that stay in permanently.

An open valve operation typically takes several hours. Combined operations — for example, valve replacement with coronary bypass, or replacement of more than one valve — take longer.

Catheter-Based Procedures (TAVI)

TAVI is usually shorter and less invasive. After the catheter access site is prepared, the new valve is advanced through the artery into the heart under X-ray and ultrasound guidance, positioned inside the old aortic valve, and deployed. The heart continues to beat throughout. Many patients are awake under sedation rather than fully under general anaesthesia, depending on the centre's practice.

Recovery and Healing

Recovery timeline after open heart valve replacement: ① ICU (day 1–2), ② cardiac ward and first mobilisation (days 2–5), ③ hospital discharge (days 5–7), ④ home rest and gentle walking (weeks 1–6), ⑤ cardiac rehabilitation and return to activity (weeks 6–12).

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Immediately After Surgery

After open valve surgery, you wake up in the intensive care unit (ICU). For a short period you are likely to have:

• A breathing tube, usually removed within hours once you are stable and breathing well
• Chest drains to remove any fluid from around the heart and lungs
• A urinary catheter
• Several intravenous lines and monitors
• Temporary pacing wires, which can be removed before you go home

Pain is managed with medication. Most people are surprised that the chest discomfort is more like a deep ache than a sharp pain, but it is real and should be reported so it can be treated.

In the Hospital

You are usually moved from ICU to a cardiac ward after one to two days. Nurses and physiotherapists help you sit up, take deep breaths, cough (often supported by holding a pillow against the chest), and walk short distances. Early movement helps the lungs recover and reduces the risk of blood clots.

Typical hospital stays are several days to about a week for open valve surgery, and shorter for TAVI — sometimes only a few days. Length of stay depends on your overall recovery, any complications, and the team's protocols.

Recovery at Home

The first few weeks at home are about gentle, gradual progress. Common patterns include:

• Fatigue — often more than people expect; rest when needed
• Walking a little more each day, with the heart team or cardiac rehabilitation programme guiding pace
• Avoiding heavy lifting (often nothing heavier than a few kilograms) for several weeks while the breastbone heals after open surgery
• No driving for a period set by your team — commonly several weeks after open surgery
• Wound care — keeping incisions clean and dry, and watching for redness, swelling, or discharge
• Mood changes — low mood and tearfulness are common in the first weeks and usually improve

Most people return to non-strenuous daily activities within several weeks. A return to work depends on the nature of the job and the type of surgery; office-type work may resume earlier than physically demanding work. Full healing of the breastbone after open surgery takes about two to three months.

Cardiac Rehabilitation

Structured cardiac rehabilitation, usually starting a few weeks after surgery, is an important part of recovery. It combines supervised exercise, education on heart-healthy living, and emotional support. Major cardiac societies recommend cardiac rehabilitation after valve surgery because it improves fitness, confidence, and long-term outcomes.

Risks and Complications

Heart valve replacement is generally safe in experienced centres, and mortality for elective isolated valve surgery is low. However, no heart operation is risk-free. The heart team will discuss your individual risk based on your age, heart function, other conditions, and the planned procedure.

Possible risks include:

• Bleeding, sometimes requiring transfusion or a return to the operating theatre
• Infection of the wound, lungs, urinary tract, or, less commonly, the new valve itself (prosthetic valve endocarditis)
• Abnormal heart rhythms, especially atrial fibrillation, which is common after heart surgery and may need medication or, occasionally, a permanent pacemaker
• Stroke, related to clots or debris reaching the brain — uncommon but a recognised risk
• Kidney problems, usually temporary
• Pleural and pericardial effusions (fluid around the lungs or heart)
• Wound healing problems, including sternal complications after open surgery
• Valve-related issues such as paravalvular leak, valve dysfunction over time, or clot formation

Risks are higher in emergency surgery, in people who are frail or have multiple medical conditions, and when surgery is more complex (multiple valves, redo surgery, or combined procedures).

Life After Heart Valve Replacement

For many people, life after valve replacement is much better than before. Symptoms such as breathlessness and fatigue often improve substantially once the heart no longer has to work against a narrowed or leaking valve. Long-term outcomes depend on the underlying condition, the type of valve used, and how well long-term care is followed.

Anticoagulation and Medications

If you have a mechanical valve, you will need lifelong anticoagulation with warfarin, with regular INR blood tests to keep the dose in the right range. Your team will explain the target range and any food and drug interactions to be aware of.

If you have a tissue valve, long-term warfarin is usually not required, though short-term anticoagulation or antiplatelet therapy is often used in the first few months. Other medications — for blood pressure, heart failure, rhythm, or cholesterol — may continue as needed.

Preventing Endocarditis

People with replaced valves are at higher risk of infection of the valve (endocarditis). Good dental hygiene and regular dental care are important. Antibiotic prophylaxis before certain dental and other procedures is recommended by current guidelines for people with prosthetic valves; your team will give you specific advice.

Follow-up

Long-term follow-up usually involves regular reviews with a cardiologist and echocardiograms at intervals defined by the team. Tissue valves are watched over time for signs of wear; mechanical valves are watched for clot formation and other issues. Any new symptoms — breathlessness, palpitations, fevers, or unusual fatigue — should be reported promptly.

Lifestyle

A heart-healthy lifestyle supports the long-term success of valve surgery:

• A balanced diet, with attention to salt, saturated fat, and (for those on warfarin) consistent intake of vitamin-K-containing foods
• Regular physical activity, building up through cardiac rehabilitation and continuing afterwards
• Not smoking
• Limiting alcohol
• Managing blood pressure, diabetes, and cholesterol
• Looking after mental health; counselling or support groups can help if anxiety or low mood persist

Pregnancy after valve replacement needs careful planning with a specialist team, particularly for women with mechanical valves on warfarin. Travel, exercise, and most usual activities can be resumed in line with the team's guidance.

Heart Valve Replacement in Children

Valve disease in children is different from valve disease in adults. Causes are more often congenital (present from birth) or related to rheumatic heart disease in regions where it remains common. Examples include congenital aortic valve disease, pulmonary valve abnormalities in tetralogy of Fallot, and severe rheumatic mitral disease.

Where possible, paediatric cardiac surgeons prefer to repair rather than replace valves in children. Replacement raises particular challenges in growing patients:

• A fixed-size valve does not grow with the child, so further surgery may be needed as the child grows
• Mechanical valves require lifelong anticoagulation, which carries different considerations in children and adolescents
• Tissue valves often wear out faster in younger patients

Specific options used in children include valve repair techniques, the Ross procedure (using the child's own pulmonary valve in the aortic position), homografts, and, for some pulmonary valve problems, transcatheter pulmonary valve replacement. Decisions are highly individualised and are usually made by paediatric cardiology and cardiac surgery teams together with the family. Long-term follow-up into adulthood is essential.

Frequently Asked Questions

How long does heart valve replacement surgery take?

An open valve replacement typically takes several hours, including the time needed for anaesthesia, the operation itself, and connecting and disconnecting the heart-lung machine. TAVI is usually shorter. Combined operations or redo surgery take longer.

Is heart valve replacement open-heart surgery?

Traditional valve replacement is open-heart surgery, performed through the breastbone with the help of a heart-lung machine. Minimally invasive surgery and TAVI offer less invasive approaches for selected patients. The right approach depends on the valve involved, the anatomy, and overall health.

How do I know whether to choose a mechanical or tissue valve?

This is a decision made together with your heart team. Mechanical valves last longer but require lifelong warfarin and INR monitoring. Tissue valves usually do not require long-term warfarin but wear out over time. Age, lifestyle, other health conditions, and personal preferences all matter. Major societies describe this as a shared decision rather than a single “right” answer.

Will I still need medication after valve replacement?

Yes, in most cases. Mechanical valves require lifelong anticoagulation. Tissue valves may need short-term blood thinners. Other medications — for blood pressure, heart rhythm, heart failure, or cholesterol — may continue depending on your overall condition.

How long do replacement valves last?

Mechanical valves are designed to last for decades and rarely fail because of wear. Tissue valves typically last many years; their lifespan varies with the patient's age and other factors, and they may eventually need to be replaced — sometimes via a less invasive valve-in-valve procedure.

When can I return to normal activities?

Most people return to non-strenuous daily activities within several weeks of open surgery, and sooner after TAVI. Full healing of the breastbone after open surgery takes about two to three months. A structured cardiac rehabilitation programme helps guide a safe return to activity, work, and exercise.

Is heart valve replacement safe?

Elective isolated valve replacement is performed safely in experienced centres, with low overall mortality. Risk depends on age, heart function, other medical conditions, and the complexity of the operation. Your team can give you a more individualised picture based on your specific situation.

What is the difference between TAVR and TAVI?

They are the same procedure. TAVI (transcatheter aortic valve implantation) is the term more commonly used in Europe; TAVR (transcatheter aortic valve replacement) is more common in the United States. Both describe a catheter-based replacement of the aortic valve.

Conclusion

Heart valve replacement is a well-established treatment for severe valve disease when repair is not possible or not durable. With careful assessment by a heart team, a thoughtful choice of approach and valve type, and structured recovery and follow-up, the operation can relieve long-standing symptoms, protect heart function, and support an active life for many years.

The decisions ahead — whether to operate, which approach to use, which valve to choose — are best made through clear conversations with your cardiologist and cardiac surgeon, with time to ask questions and consider what matters most to you. Understanding the procedure, the options, and the recovery is a strong starting point for those conversations.