TAVI Procedure: Catheter-Based Aortic Valve Replacement Explained

The TAVI procedure is a minimally invasive way to replace a narrowed aortic valve without opening the chest in the same way as traditional surgery. It is most often used for people with severe aortic stenosis who need valve replacement and are assessed by a heart team.

Overview

The TAVI procedure, short for transcatheter aortic valve implantation, is a catheter-based treatment for a diseased aortic valve. It is also widely known as TAVR, or transcatheter aortic valve replacement. During the procedure, doctors place a new biological valve inside the patient’s narrowed aortic valve, helping blood flow more easily from the heart to the rest of the body.

TAVI is most commonly performed for severe aortic stenosis. In this condition, the aortic valve becomes stiff, narrowed or calcified and cannot open fully. When the valve opening is too small, the heart has to work harder to pump blood, which can lead to symptoms such as breathlessness, chest discomfort, fainting or fatigue.

Unlike conventional surgical aortic valve replacement, TAVI usually does not require a large chest incision or stopping the heart. The new valve is delivered through a thin tube called a catheter, most often through the femoral artery in the groin. For suitable patients, this less invasive approach can support a shorter hospital stay and a smoother early recovery.

What the Aortic Valve Does

The aortic valve sits between the left ventricle, the heart’s main pumping chamber, and the aorta, the largest artery in the body. Each time the heart beats, the valve opens to let oxygen-rich blood leave the heart. It then closes to prevent blood from leaking backward.

With age or certain medical conditions, calcium may build up on the valve leaflets. These leaflets can become thick and stiff, limiting how far the valve can open. This narrowing is called aortic stenosis, and it can gradually reduce the amount of blood that reaches the brain, muscles and other organs during activity.

Severe aortic stenosis can place strain on the heart muscle over time. Some people have no symptoms at first, while others notice changes in exercise tolerance, shortness of breath or dizziness. Once symptoms develop, valve replacement is often considered because medicines may relieve some associated symptoms but cannot reverse a severely narrowed valve.

Who May Be a Candidate for TAVI

Not every person with aortic stenosis needs TAVI, and not every person is anatomically suitable for it. Candidacy is decided by a multidisciplinary heart team, usually including interventional cardiologists, cardiac surgeons, imaging specialists, anesthesiologists and other clinicians. The team considers the severity of valve disease, symptoms, age, frailty, other medical conditions and the expected benefits and risks of different treatment options.

TAVI was first used mainly for people considered too high-risk for open-heart surgery. Over time, evidence and technology have expanded its use to many patients at intermediate or lower surgical risk, depending on individual features. However, surgery may still be preferred for some people, especially when there are other heart conditions needing repair, certain valve anatomy patterns, or a need for long-term durability in younger patients.

Factors commonly reviewed before recommending TAVI include:

• Severity of aortic stenosis and presence of symptoms
• Valve size, calcification pattern and aortic root anatomy
• Condition and size of the arteries used to deliver the catheter
• Kidney function, lung disease, previous heart surgery and overall fitness
• Risk of complications such as stroke, bleeding or heart rhythm problems

How the TAVI Procedure Is Performed

Before TAVI, patients undergo detailed testing to plan the safest route and valve size. This often includes echocardiography, computed tomography angiography, blood tests, electrocardiography and sometimes coronary angiography. These tests help the team map the heart, valve and blood vessels and identify whether any coronary artery disease also needs attention.

On the day of the procedure, TAVI is performed in a catheterization laboratory or hybrid operating room equipped for advanced imaging and cardiac care. The patient may receive local anesthesia with sedation or general anesthesia, depending on medical factors and hospital practice. The most common approach is transfemoral TAVI, in which the catheter enters through the femoral artery in the groin.

The replacement valve is mounted on a stent-like frame and compressed onto the catheter. Using X-ray and ultrasound guidance, the doctor advances it to the aortic valve. The new valve is then expanded, pushing the old valve leaflets aside and taking over their function. In many cases, the new valve begins working immediately.

After deployment, the team checks valve position, blood flow, pressure measurements and any leakage around the valve. The catheter is removed, and the access site is closed. Patients are then monitored in a recovery area or cardiac care unit, where heart rhythm, blood pressure, kidney function and the groin access site are watched carefully.

Benefits, Risks and Limitations

The main benefit of the TAVI procedure is that it treats severe aortic stenosis without the more extensive surgical steps required in open-heart valve replacement. For suitable patients, it may reduce the physical stress of treatment, allow earlier mobilization and shorten the initial recovery period. Many patients experience improvement in breathing, energy and daily activity after the valve obstruction is relieved.

Like all heart procedures, TAVI has potential risks. These can include bleeding, bruising or injury at the catheter entry site, damage to blood vessels, kidney strain from contrast dye, stroke, infection, valve leakage, valve movement, heart rhythm disturbances or the need for a permanent pacemaker. The exact risk varies from person to person and should be discussed with the treating heart team.

TAVI also has limitations. Long-term durability is still an important consideration, especially for younger patients who may live many decades after valve replacement. Some valve types and anatomical situations are better suited to surgical replacement. The choice between TAVI and surgery should be individualized rather than based only on age or preference.

Recovery and Follow-Up Care

Recovery after TAVI is generally faster than after open-heart surgery, but it still requires medical supervision. Some patients are able to sit up and walk with assistance within a short time, depending on their condition and the access site. The hospital stay varies according to recovery, heart rhythm stability, kidney function and whether any complications need monitoring.

After discharge, patients receive instructions about wound care, activity, medicines and warning signs. Doctors may prescribe antiplatelet or anticoagulant medication depending on the patient’s valve type, heart rhythm and other conditions. It is important not to stop or change heart medicines without medical advice.

Follow-up usually includes clinical visits and echocardiography to check how well the new valve is working. Patients may also need ongoing management of blood pressure, cholesterol, diabetes, coronary artery disease or heart failure. Good dental hygiene and guidance about infection prevention are important because artificial heart valves can be vulnerable to infection.

Cardiac rehabilitation may be recommended for some people. This supervised program combines safe exercise, education and lifestyle support. It can help patients rebuild confidence, improve endurance and understand how to protect heart health after valve treatment.

When to See a Doctor

People known to have a heart murmur, aortic stenosis or valve disease should attend regular cardiology follow-up, even if they feel well. A doctor should be consulted if new symptoms appear, such as shortness of breath, chest pressure, fainting, lightheadedness, swelling in the legs, palpitations or a noticeable decline in exercise capacity.

After a TAVI procedure, patients should seek urgent medical advice if they develop chest pain, sudden weakness or speech difficulty, fainting, severe breathlessness, fever, worsening groin swelling, bleeding, signs of infection or a very slow or irregular heartbeat. These symptoms do not always mean a serious problem is present, but they should be assessed promptly.

At Acibadem International, multidisciplinary cardiovascular specialists and JCI-accredited hospitals diagnose and treat aortic valve disease, including TAVI evaluation and care for international patients. Decisions about TAVI are made after detailed assessment so that each patient can understand the possible benefits, risks and alternatives.

Frequently asked questions

Is TAVI the same as TAVR?

Yes. TAVI means transcatheter aortic valve implantation, while TAVR means transcatheter aortic valve replacement. The terms describe the same catheter-based method of placing a new valve inside a narrowed aortic valve.

Is the TAVI procedure open-heart surgery?

No. TAVI is not open-heart surgery in the traditional sense because it usually does not require a large chest incision or use of a heart-lung machine. The valve is delivered through a catheter, most often through an artery in the groin.

Who decides whether TAVI or surgery is better?

The decision is usually made by a heart team after reviewing symptoms, imaging tests, surgical risk, anatomy and overall health. Patient preferences are also important, but the safest option depends on medical details.

How long does recovery take after TAVI?

Many patients recover more quickly after TAVI than after open-heart surgery, but recovery time varies. Age, frailty, other heart or lung conditions, and any procedure-related issues can affect how soon a person returns to normal activities.

Will medicines still be needed after TAVI?

Most patients continue some heart-related medicines after TAVI. These may include medicines for blood pressure, cholesterol, heart rhythm or blood clot prevention, depending on the individual. Medication plans should be followed exactly as prescribed.

How long does a TAVI valve last?

TAVI valves are designed to function for many years, but durability can vary by patient, valve type and medical factors. Regular follow-up echocardiograms help doctors monitor valve performance over time.

Can aortic stenosis be treated with medication instead of TAVI?

Medicines can help manage related symptoms or other heart conditions, but they cannot open a severely narrowed aortic valve. When severe aortic stenosis causes symptoms or affects heart function, valve replacement with TAVI or surgery may be considered.

References

• European Society of Cardiology
• American College of Cardiology
• American Heart Association
• Society of Thoracic Surgeons
• National Institute for Health and Care Excellence

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.