What Happens When a Replacement Heart Valve Wears Out?

A replacement heart valve is designed to restore normal blood flow through the heart, but no artificial valve is guaranteed to last forever. Over time, some replacement valves can develop structural changes, become narrowed or leaky, or experience other forms of dysfunction. 

When this happens, the valve needs to be evaluated to determine whether monitoring, medication, a catheter-based procedure, or another valve replacement is appropriate. 

Understanding what happens when a replacement valve wears out can help you recognize changes early and understand what your treatment team may recommend.

Learn more about the procedure, types of replacement valves, recovery, and follow-up in our guide to Heart Valve Replacement Surgery.

Can a Replacement Heart Valve Wear Out?

Yes. The likelihood and timing depend largely on the type of valve used. Mechanical valves are designed for long-term durability and generally do not undergo the same type of leaflet degeneration seen with tissue valves. 

However, they can still develop problems such as thrombosis, infection, obstruction, or damage around the valve. Tissue valves, also called bioprosthetic valves, are made from animal or human biological tissue. Their leaflets can gradually deteriorate over time. This process is known as structural valve deterioration.

A valve may therefore "wear out" in different ways. It does not necessarily mean that the valve suddenly stops working. In many cases, deterioration develops gradually and is detected through routine follow-up before severe symptoms occur.

Why Does a Replacement Valve Deteriorate?

Several problems can affect a prosthetic heart valve:

• Structural valve deterioration: Tissue valve leaflets can become thickened, stiff, calcified, torn, or otherwise damaged.
• Valve narrowing: A deteriorating valve may restrict blood flow, causing stenosis.
• Valve leakage: A prosthetic valve may develop regurgitation, allowing blood to flow backward.
• Blood clot formation: Thrombosis can interfere with the normal movement of a mechanical or tissue valve.
• Infection: Prosthetic valve endocarditis can damage the valve or surrounding tissues.
• Paravalvular leak: Blood may leak around the outside of the prosthetic valve rather than through it.

These problems do not all represent normal aging of the valve. Some require urgent assessment because they can progress quickly.

How Long Does a Replacement Heart Valve Last?

There is no single lifespan that applies to every replacement valve. Durability depends on the valve type, the position of the valve, the patient's age, overall health, and other individual factors.

Mechanical valves are generally selected when long-term durability is an important consideration. They can function for many years, but lifelong anticoagulation is usually required to reduce the risk of blood clots.

Tissue valves may eventually undergo structural deterioration. This is one reason patients with bioprosthetic valves require lifelong clinical and imaging follow-up even when they feel well.

Importantly, a tissue valve reaching a certain number of years does not automatically mean that it needs to be replaced. The valve's actual function, symptoms, imaging findings, and overall health are more important than age alone.

What Are the Signs That a Replacement Valve Is Wearing Out?

Valve deterioration may initially cause no noticeable symptoms. As valve dysfunction becomes more significant, however, symptoms can develop. Possible warning signs include:

• Shortness of breath, especially during activity
• Increasing tiredness or reduced exercise tolerance
• Swelling of the legs, ankles, or abdomen
• Chest discomfort
• Dizziness or fainting
• Palpitations or an irregular heartbeat
• Reduced ability to perform normal daily activities
• Unexplained weight gain related to fluid retention

These symptoms are not specific to prosthetic valve failure and can occur with many heart conditions. They should therefore be assessed rather than assumed to mean that the replacement valve has failed.

How Is a Worn-Out Replacement Valve Diagnosed?

The first step is usually a clinical assessment combined with heart imaging. Echocardiography is particularly important because it can show how well the prosthetic valve is opening and closing and whether blood is flowing normally through it.

Depending on the situation, additional tests may include:

• Electrocardiogram (ECG)
• Transesophageal echocardiography
• Cardiac CT
• Cardiac MRI in selected situations
• Blood tests, particularly when infection or other complications are suspected
• Other imaging or cardiac tests when the initial findings are unclear

The aim is not only to determine whether the valve is functioning abnormally, but also to identify the cause. This distinction matters because treatment for structural degeneration is different from treatment for valve thrombosis or infection.

What Happens If a Tissue Valve Wears Out?

When a bioprosthetic valve develops significant structural deterioration, the treatment depends on the valve involved, the severity of dysfunction, the patient's symptoms, anatomy, surgical risk, age, previous procedures, and other health conditions.

In some patients, a second surgical valve replacement may be considered. In selected patients, a transcatheter valve-in-valve procedure may provide another treatment option, particularly when the failed valve is suitable for this approach.

During a valve-in-valve procedure, a new replacement valve is delivered through a catheter and positioned inside the existing prosthetic valve. The new valve then takes over the function of the deteriorated valve.

However, valve-in-valve treatment is not appropriate for everyone. The size and type of the existing valve, the anatomy of the heart and blood vessels, the risk of obstruction, the location of the valve, and other clinical factors must be carefully assessed.

What If a Mechanical Valve Fails?

Mechanical valve failure is managed differently because mechanical valves are not expected to deteriorate through the same biological process as tissue valves.

A mechanical valve can nevertheless develop serious complications, including thrombosis, obstruction, infection, or significant dysfunction. If a patient has significant symptomatic mechanical valve dysfunction that is not caused by treatable valve thrombosis, reoperation may be required.

Anticoagulation is also an important part of mechanical valve care. If a mechanical valve patient develops symptoms or an abnormal valve examination, the medical team may need to assess anticoagulation control and investigate whether a clot is affecting valve function.

Can a Failed Tissue Valve Be Treated Without Open-Heart Surgery?

In selected patients, yes. Transcatheter valve-in-valve treatment can sometimes be used when a previous bioprosthetic valve has failed.

This approach can avoid another open surgical procedure in appropriate patients. However, it is not automatically safer or more suitable for everyone. 

The existing prosthesis and patient's anatomy must be carefully evaluated, and potential problems such as residual narrowing or coronary obstruction need to be considered.

The Bottom Line

A replacement heart valve can provide many years of improved blood flow and symptom relief, but it still requires lifelong follow-up. Tissue valves can gradually develop structural deterioration, while mechanical valves can experience complications such as thrombosis, infection, or obstruction. 

A worn or malfunctioning valve does not automatically mean another open-heart surgery is necessary. Depending on the type of valve and the patient's individual circumstances, monitoring, transcatheter valve-in-valve treatment, or surgical replacement may be considered. 

Early evaluation of new symptoms and regular imaging are key to identifying prosthetic valve problems before they become more serious.