TAVI / TAVR

Introduction

If you have been told that you have severe aortic stenosis and that your doctors are considering TAVI or TAVR, you are facing a major decision about your heart. This article is written to help you understand the procedure, what happens before and after, the alternatives, the risks, and what life tends to look like in the months and years afterward.

TAVI stands for transcatheter aortic valve implantation. TAVR stands for transcatheter aortic valve replacement. They are the same procedure — different regions and different specialists tend to use one term or the other. Throughout this article, both terms are used together.

The procedure has changed the treatment of aortic valve disease over the past two decades. Patients who once would have been told they were too high-risk for open-heart surgery now have a treatment option. More recently, TAVI / TAVR has expanded to include many patients at intermediate and even lower surgical risk. Whether it is the right choice in your situation depends on your anatomy, your overall health, your age, and a careful evaluation by a multidisciplinary team.

TAVI / TAVR is a procedure to replace a diseased aortic valve using a long, thin tube called a catheter, rather than by opening the chest. The new valve is collapsed down to a small size, threaded through a blood vessel — most often the large artery in the groin — and guided up into the heart. Once positioned inside the old, diseased valve, it is expanded into place. The new valve immediately takes over the job of controlling blood flow out of the heart.

To understand why this matters, it helps to understand the aortic valve. The aortic valve sits at the exit of the left ventricle, the heart’s main pumping chamber. Every time the heart beats, the valve opens to let oxygen-rich blood flow out into the aorta and the rest of the body, then closes to stop blood from flowing backward. In aortic stenosis, the valve becomes thickened, stiff, and narrowed — usually because of calcium deposits that build up over decades. As the opening shrinks, the heart has to work much harder to push blood through. Over time this leads to symptoms such as breathlessness, chest discomfort, fatigue, lightheadedness, and fainting. Once severe aortic stenosis becomes symptomatic, the outlook without valve replacement is poor, which is why timely treatment matters.

Before TAVI / TAVR existed, the only option for a failing aortic valve was open surgery — surgical aortic valve replacement, or SAVR — in which the chest is opened, the heart is stopped, and the diseased valve is cut out and stitched out with a prosthetic one. SAVR remains an excellent operation and is still the preferred choice in many situations. TAVI / TAVR adds a less invasive route for patients in whom open surgery carries higher risk or is otherwise less suitable.

Bioprosthetic Valves Used in TAVI / TAVR

The valves used in TAVI / TAVR are bioprosthetic, meaning they are made from animal tissue (commonly bovine or porcine pericardium) mounted on a metal frame, or stent. There are two main categories:

• Balloon-expandable valves. The valve is mounted on a balloon catheter and expanded by inflating the balloon at the target position.
• Self-expanding valves. The valve is held in a compressed state inside the delivery system and springs open into place once released.

Each design has strengths and limitations. The choice between them is made by the Heart Team based on your valve anatomy, the size and shape of the aortic root, the calcification pattern, the access route, and other factors. From a patient’s perspective, both designs are widely used and both have been studied in large clinical trials.

Why Is TAVI / TAVR Performed?

The main reason for TAVI / TAVR is severe aortic stenosis — particularly severe aortic stenosis that is causing symptoms. Symptoms commonly include:

• Shortness of breath, especially during exertion
• Chest pain or pressure (angina)
• Fainting or near-fainting (syncope)
• Reduced exercise tolerance and unusual tiredness
• Signs of heart failure, such as swelling in the legs or difficulty lying flat

In some cases, doctors may consider valve replacement even before symptoms appear — for example, when imaging shows that the left ventricle is starting to weaken because of the long-standing strain.

A smaller group of patients receives TAVI / TAVR for a failing surgical bioprosthetic valve that was implanted years earlier. In this situation, the new valve is placed inside the old surgical valve. This is called a valve-in-valve procedure and is one of the important reasons TAVI / TAVR has grown in use.

TAVI / TAVR is not typically used for pure aortic regurgitation (a leaking, rather than narrowed, valve) outside of selected cases and specific devices, although the field is evolving.

Who Is a Candidate?

Candidacy for TAVI / TAVR is assessed by a Heart Team — a multidisciplinary group that usually includes an interventional cardiologist, a cardiac surgeon, an imaging cardiologist, an anaesthetist, and sometimes a geriatrician. This team approach is recommended by major cardiology societies, including the American College of Cardiology, the American Heart Association, and the European Society of Cardiology.

The team weighs several factors:

• Severity of aortic stenosis and symptoms. TAVI / TAVR is considered when the stenosis is severe and either causing symptoms or starting to affect heart function.
• Surgical risk. Risk scores, frailty assessment, and other medical conditions help predict how a patient would tolerate open surgery. Higher surgical risk has traditionally favoured TAVI / TAVR.
• Age and life expectancy. Because bioprosthetic valves have a limited durability, age and projected lifespan are part of the discussion. Historically, TAVI / TAVR has been favoured in older patients. With expanding evidence, it is now also considered in younger and lower-risk patients in many centres.
• Valve and vessel anatomy. Detailed CT imaging is used to measure the aortic valve, the aortic root, the coronary arteries, and the arteries through which the catheter will travel. Some anatomy is better suited to surgery; some is better suited to TAVI / TAVR.
• Other cardiac problems. If you also need bypass surgery, a different valve replaced, or repair of the aorta, open surgery may be the more complete option.

Current ACC/AHA and ESC/EACTS guidelines describe TAVI / TAVR as a reasonable option across a wide range of risk categories, with the final choice between TAVI / TAVR and surgery decided collaboratively. Whether the procedure is appropriate for you is a clinical decision made with the Heart Team.

Alternatives to TAVI / TAVR

Understanding the alternatives helps put TAVI / TAVR in context.

Surgical Aortic Valve Replacement (SAVR)

SAVR is open-heart surgery in which the diseased valve is removed and replaced with either a mechanical valve or a bioprosthetic (tissue) valve. Advantages include a long track record and the ability to address other heart problems at the same operation. Mechanical valves can last for decades but require lifelong blood-thinning medication. SAVR involves a longer hospital stay, a longer recovery, and a chest incision.

Balloon Aortic Valvuloplasty

In this procedure, a balloon is passed across the diseased valve and inflated to crack open the calcified leaflets. The benefit is short-lived — the valve usually narrows again within months — so balloon valvuloplasty is generally used as a bridge: a temporising step in very unwell patients before a more definitive procedure, or as a way to test how a patient might respond to a valve replacement.

Medical Therapy Alone

For severe symptomatic aortic stenosis, medications cannot reopen the valve. Drugs may be used to manage symptoms of heart failure, blood pressure, or rhythm problems, but they do not change the natural history of the disease. Medical therapy alone is generally reserved for patients who are not candidates for either TAVI / TAVR or surgery, often because of advanced illness elsewhere in the body.

Watchful Waiting

For patients with severe aortic stenosis but no symptoms and preserved heart function, doctors may recommend close monitoring with repeated echocardiograms rather than immediate intervention. The decision about when to move from watching to acting is individualised.

TAVI / TAVR Approaches: How the Valve Is Delivered

TAVI / TAVR is named for the access route — the blood vessel used to deliver the valve. The transfemoral route is by far the most common, but several alternatives exist for patients whose vessels are unsuitable.

Transfemoral Access

The catheter is inserted through the femoral artery in the groin and guided up the aorta to the heart. This is the default approach because it is the least invasive and does not require any chest incision. It is usually done under local anaesthesia and sedation rather than general anaesthesia. The large majority of TAVI / TAVR procedures worldwide are performed this way.

Transapical Access

A small incision is made between the ribs on the left side, and the valve is delivered directly through the tip (apex) of the heart. This was one of the earliest alternative routes when groin vessels were unsuitable, but it is less commonly used today because of more invasive recovery compared with transfemoral.

Transaortic Access

The valve is delivered through a small incision in the upper chest and directly into the aorta. Like transapical, this approach is now less common but remains an option in selected cases.

Subclavian or Axillary Access

The valve is delivered through an artery beneath the collarbone. This is a common alternative when the groin arteries are too narrow, too calcified, or too tortuous to allow transfemoral access.

Transcarotid Access

The valve is delivered through the carotid artery in the neck. This route has been used more frequently in recent years and is offered in centres with the relevant experience.

Transcaval Access

A specialised route in which the catheter crosses from a large vein into the aorta inside the abdomen, used in patients in whom no other route is feasible. It is performed only in a small number of highly experienced centres.

Preparing for TAVI / TAVR

Preparation for TAVI / TAVR is usually thorough because the team needs detailed information about your valve, your vessels, and your overall health.

Pre-Procedure Tests

You can expect some or all of the following:

• Echocardiogram. An ultrasound of the heart that confirms the severity of aortic stenosis and assesses overall heart function.
• CT angiography. A detailed scan of the heart, the aorta, and the arteries from the groin up. This is the central planning test for TAVI / TAVR — it provides the measurements needed to choose the right valve size and the safest access route.
• Coronary angiography. A catheter-based test that maps the coronary arteries. If significant blockages are found, your team may discuss treating them before or at the time of TAVI / TAVR, or considering surgery instead.
• Blood tests. Including kidney function, blood counts, clotting, and blood type.
• Lung function tests. Particularly if there is a history of chronic lung disease.
• Dental check. Because the valve is a foreign material, infection risk needs to be reduced before implantation. Dental problems may be treated in advance.
• Frailty and cognitive assessment. Particularly in older patients, this helps the team estimate likely recovery and outcomes.

Medications Before the Procedure

Your team will give you specific instructions about your usual medications. Blood thinners such as warfarin, apixaban, rivaroxaban, dabigatran, or clopidogrel may need to be adjusted or paused in advance. Diabetes medications, blood pressure medications, and diuretics may also need temporary changes. Do not adjust these on your own — follow the team’s written instructions.

The Day Before and the Day Of

You will usually be asked to fast (no food or drink) for several hours before the procedure. The team will shave and clean the groin area or other access site, place IV lines, and may give antibiotics to reduce infection risk. You may meet the anaesthetist to review your plan for sedation or anaesthesia. Family members are usually able to be present beforehand and to wait nearby during the procedure.

What Happens During the Procedure

1. Anaesthesia. Most patients receive local anaesthesia and conscious sedation — awake but drowsy and comfortable. Some procedures are done under general anaesthesia depending on the situation.
2. Access. A small puncture (sometimes a small cut) is made in the groin to enter the femoral artery. A second access point may be used in the other groin or arm for additional catheters.
3. Guidewire and catheter placement. Thin wires and catheters are advanced under X-ray guidance through the aorta and across the diseased aortic valve.
4. Optional balloon predilation. In some cases, a balloon is briefly inflated across the diseased valve to make room for the new valve.
5. Valve deployment. The collapsed new valve is positioned precisely inside the diseased valve and then expanded into place. For a balloon-expandable valve, a balloon is inflated to deploy it. For a self-expanding valve, the device is slowly released from its sheath. The heart may be paced very rapidly for a few seconds during deployment to keep the valve stable.
6. Checking the result. Imaging (X-ray contrast and often echocardiography) confirms that the valve is in the correct position, opens fully, and is not leaking around the edges.
7. Closing access. The catheters are removed and the access site is closed, often with a dedicated closure device. Sometimes a small stitch is needed.

Recovery from TAVI / TAVR is typically faster than recovery from open-heart surgery, but it is still a major cardiac procedure. Healing happens in stages.

The First 24 Hours

You will be monitored closely, often in a coronary care unit or step-down unit, with heart rhythm, blood pressure, and oxygen levels tracked continuously. You will be asked to lie flat for several hours after a transfemoral procedure to allow the artery to seal. Many patients are encouraged to sit up and even walk later the same day or the following morning.

The Hospital Stay

A typical hospital stay is two to five days, although some patients are discharged earlier and some need longer monitoring. During the stay the team will check for complications, observe your heart rhythm (because some patients develop conduction problems that need a pacemaker), confirm the access site is healing well, and adjust your medications. An echocardiogram is usually done before discharge to confirm the new valve is working properly.

The First Few Weeks at Home

Most patients feel noticeably better within days, particularly in terms of breathlessness, because the heart is no longer fighting a narrow valve. At the same time, your body needs time to recover from the procedure itself. During the first few weeks:

• Take walking slowly. Short, frequent walks are usually encouraged, increasing distance as you feel able.
• Avoid heavy lifting and strenuous activity for the period recommended by your team, often a couple of weeks.
• Keep the groin access site clean and dry as instructed. A small bruise or lump is common and usually settles.
• Take your medications exactly as prescribed, particularly antiplatelet drugs or anticoagulants.
• Watch for warning signs (see below) and contact your team or seek care if they appear.

Cardiac Rehabilitation

Many patients are offered a cardiac rehabilitation programme — a structured course of supervised exercise and education that helps the heart recover and supports long-term health. Major cardiology societies endorse cardiac rehabilitation after valve replacement. Whether it is appropriate for you and what form it takes is decided by your team.

Returning to Normal Life

Most patients return to their usual activities — walking, light housework, driving, social outings — within one to two weeks, though this varies. Returning to work depends on the nature of the job. Sexual activity, travel by air, and exercise are generally resumed gradually based on individual recovery and your team’s advice.

Risks and Complications

TAVI / TAVR has become safer as devices, imaging, and operator experience have improved. It is still a procedure on the heart, and the possible complications deserve clear, honest discussion.

Common or Important Complications

• Vascular complications. Bleeding, bruising, or injury at the access site in the groin or other artery. Most are managed without further surgery; serious vascular injury is less common in experienced centres.
• Need for a permanent pacemaker. The new valve sits close to the heart’s electrical conduction pathways. In some patients, the conduction system is disturbed and a pacemaker is needed. Rates vary by valve type and patient factors.
• Stroke. A small risk of stroke exists, related to debris dislodged during the procedure or to rhythm changes. Major clinical trials have shown stroke rates that have decreased over time as technique has improved.
• Paravalvular leak. A small amount of leakage around the edge of the new valve. Mild leaks are common and usually well tolerated; more significant leaks are less common with current devices and may require additional treatment.
• Acute kidney injury. Related to contrast dye and the stress of the procedure. Risk is higher in patients with pre-existing kidney disease.
• Rhythm problems. New atrial fibrillation or conduction changes can occur and may need treatment.
• Coronary obstruction. A rare but serious complication in which the new valve interferes with blood flow into the coronary arteries. Pre-procedure CT planning is used to anticipate and prevent this.
• Bleeding. Beyond the access site, internal bleeding can occur and may require transfusion.
• Infection (endocarditis). Infection of the new valve is uncommon but serious when it occurs. Good dental and skin health and prompt treatment of infections elsewhere in the body reduce this risk.

Long-Term Considerations

• Valve durability. Bioprosthetic valves are not permanent. Current data suggest good performance over many years, with valve degeneration becoming more likely with longer follow-up. The implications depend strongly on age at implantation.
• Future valve interventions. If the implanted valve degenerates, options may include a valve-in-valve TAVI / TAVR or surgery, depending on the situation.

For most patients, life after TAVI / TAVR is a process of regaining energy, returning to activities, and adjusting to the medications and follow-up that come with a prosthetic valve.

How You May Feel

Many patients notice quickly that everyday activities — climbing stairs, walking, light exercise — feel easier than they did before the procedure. Improvements in fatigue and breathlessness often continue over weeks to months as the heart adapts to no longer working against a narrow valve. Some symptoms unrelated to the valve, such as long-standing lung disease or arthritis, will continue and need their own management.

Medications

You will usually be on one or more medications to reduce the risk of blood clots forming on the new valve, particularly in the early months. The exact regimen depends on your other medical conditions — for example, whether you have atrial fibrillation. Other heart medications (for blood pressure, cholesterol, heart failure, or rhythm) may continue or be adjusted. Take medications exactly as prescribed and do not stop them on your own.

Follow-up Appointments and Imaging

Routine follow-up usually includes clinical review and echocardiography to check valve function. The frequency depends on your situation but typically involves an early post-procedure check, then visits at structured intervals over the first year, then at least annually. Tell your team about any new symptoms — particularly breathlessness, fainting, fever, or a return of chest discomfort — without waiting for the next scheduled visit.

Lifestyle

Most patients are encouraged to stay active. Walking, swimming, and other moderate aerobic activity support cardiovascular health and recovery. Smoking cessation, blood pressure control, diabetes control, healthy weight, and managing cholesterol all reduce the burden on the heart and on the new valve. Dental hygiene is important for the life of the valve; tell your dentist about your valve, and discuss whether antibiotic prophylaxis is recommended before certain dental procedures.

Travel and Daily Life

Air travel, driving, and most everyday activities are usually resumed after the initial recovery period, on your team’s advice. Carry a card or note that identifies the type and size of valve you have received — this can be useful in future medical care.

Warning Signs to Act On

Contact your team or seek urgent care if you experience:

• New or worsening breathlessness, especially at rest or when lying flat
• Chest pain or pressure
• Fainting or near-fainting
• An unusually fast, slow, or irregular heartbeat
• Fever, chills, or unexplained feeling unwell — particularly within months of the procedure, as these can be early signs of valve infection
• Bleeding that does not stop or unusually large bruising
• Sudden weakness, facial droop, slurred speech, or difficulty understanding speech — possible signs of stroke, which need immediate emergency care

Frequently Asked Questions

Is TAVI / TAVR considered surgery?

TAVI / TAVR is sometimes called surgery in casual conversation, but technically it is a catheter-based interventional procedure, not open-heart surgery. The chest is not opened and the heart is not stopped.

Will I be awake during the procedure?

Many transfemoral TAVI / TAVR procedures are done under local anaesthesia with sedation, which means you are drowsy and comfortable but not fully asleep. Some procedures are done under general anaesthesia. The team will discuss which approach is planned for you.

How long does the new valve last?

Bioprosthetic valves used in TAVI / TAVR are not permanent. Studies have shown good performance over many years, with the risk of valve deterioration increasing with longer follow-up. What this means for an individual depends on age and other factors, and is discussed by the Heart Team when planning the procedure.

Will I need a pacemaker after TAVI / TAVR?

A proportion of patients develop conduction system changes after TAVI / TAVR that require a permanent pacemaker. The likelihood depends on the valve type, your pre-existing conduction system, and other factors. Your team can give you an estimate based on your specific situation.

What is the difference between TAVI and TAVR?

There is no difference in the procedure. “TAVI” (transcatheter aortic valve implantation) is the term used more often in Europe and many other regions; “TAVR” (transcatheter aortic valve replacement) is the term used more often in the United States. Many cardiologists use the terms interchangeably.

Can I have an MRI scan after TAVI / TAVR?

Most modern TAVI / TAVR valves are MRI-conditional, meaning MRI is generally safe under specific conditions. Tell the radiology team about your valve and provide your valve identification card if you have one.

How soon can I return to work?

Return to work varies with the nature of the job and individual recovery. Many patients with desk-based work return within a couple of weeks; physically demanding jobs may require longer. Your team will guide the timing.

What if my coronary arteries are also blocked?

If significant coronary artery disease is found during the workup, the Heart Team will discuss whether to treat the blockages with stents before or at the time of TAVI / TAVR, or whether the combined picture is better suited to surgery (valve replacement and bypass).

Is TAVI / TAVR an option for a leaking aortic valve (aortic regurgitation)?

TAVI / TAVR was developed and is mainly used for aortic stenosis. Some specialised devices and techniques exist for selected patients with aortic regurgitation, but in general surgery remains the more common option for pure regurgitation.

Will I need lifelong blood thinners?

The medication plan after TAVI / TAVR depends on your situation. Some patients are on antiplatelet drugs alone; those with other conditions such as atrial fibrillation are usually on anticoagulants. The team will personalise this plan and review it over time.

Conclusion

TAVI / TAVR has changed the landscape of aortic valve disease. It offers a less invasive route to valve replacement that, for many patients, brings rapid relief of symptoms and a faster return to everyday life than open-heart surgery. It also expands the range of patients who can be offered effective treatment for severe aortic stenosis.

At the same time, TAVI / TAVR is a serious cardiac procedure with real risks and long-term considerations. The choice between TAVI / TAVR and surgical valve replacement, the choice of valve type, and the choice of access route are all individualised decisions made by a Heart Team in light of your anatomy, your overall health, and your preferences.

The most useful preparation you can do is to understand the procedure, write down your questions, and have an open conversation with the team caring for you. With careful planning and good follow-up, many patients live well for years after TAVI / TAVR, with a heart that no longer has to fight a narrow valve.