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Transcatheter Aortic Valve Implantation (TAVI)

Transcatheter Aortic Valve Implantation (TAVI)—also known as Transcatheter Aortic Valve Replacement (TAVR)—is a revolutionary, minimally invasive heart procedure designed to replace a diseased aortic valve without open-heart surgery.

It is especially beneficial for patients with severe aortic stenosis, a condition in which the aortic valve becomes stiff, calcified, and narrow, making it difficult for blood to flow out of the heart.

TAVI has transformed the treatment landscape by offering a safe, effective, and faster-recovery alternative to traditional valve replacement, particularly for elderly, frail, or high-risk patients.
Today, with advances in technology, TAVI is increasingly being used even for intermediate and low-risk patients, after careful evaluation by a dedicated Heart Team.

What Is Aortic Stenosis?

The aortic valve works like a one-way door that opens every time the heart pumps blood and closes to prevent backflow.

In aortic stenosis:

  • The valve becomes hard and calcified

  • It opens only partially

  • The heart has to work much harder

  • Blood flow to the brain and body reduces

Over time, this leads to:

  • Chest pain

  • Fatigue

  • Fainting

  • Breathlessness

  • Heart failure

Without treatment, severe aortic stenosis can be fatal.

Why TAVI Is Needed

TAVI is performed to:

  • Restore normal blood flow

  • Reduce symptoms dramatically

  • Improve heart function

  • Increase survival

  • Avoid open-chest surgery

  • Provide quicker recovery

  • Improve quality of life

TAVI is often lifesaving for patients who are not ideal candidates for conventional surgery.

Who Is Eligible for TAVI?

Traditionally, TAVI was recommended only for:

  • High-risk surgical patients

  • Elderly individuals

  • Frail patients

  • Patients with multiple medical problems

  • Patients who had prior heart or chest surgeries

But now, due to better valve designs and safer techniques, TAVI is increasingly offered to:

  • Intermediate-risk patients

  • Carefully selected low-risk patients

A multidisciplinary Heart Team (cardiac surgeon + interventional cardiologist + imaging specialist + anesthesiologist) evaluates each case to determine whether TAVI or conventional surgery is best.

Pre-Procedure Evaluation: How Doctors Decide

To ensure safety and precision, patients undergo detailed imaging such as:

  • Echocardiography (valve severity)

  • CT Angiography (aorta, arteries, and access routes)

  • Coronary angiography (coronary artery condition)

  • Blood tests

  • General health assessment

CT is especially important because millimetre-level precision is required to choose the correct valve size.

How the TAVI Procedure Is Performed

(Explained simply with step-by-step clarity)

1. Access Route Selection

The valve can be implanted via:

  • Transfemoral (groin artery) → Most common

  • Transapical (small incision near left chest)

  • Subclavian or axillary artery

  • Direct aortic approach

Most patients (>90%) undergo transfemoral TAVI, which uses only a needle puncture in the groin.

2. Valve Insertion

A thin tube (catheter) carrying the new artificial valve is gently advanced through the artery to the heart.

The valve is mounted on:

  • A balloon-expandable frame

    or

  • A self-expanding nitinol frame

3. Valve Deployment
Once the catheter reaches the native aortic valve:

  • The new valve is accurately positioned

  • It expands, pushing aside the old, calcified valve

  • It immediately begins functioning like a normal valve

In balloon-expandable valves, expansion is performed during rapid pacing to stabilise the heart.

4. Completion
After confirming perfect placement by imaging:

  • The catheter is removed

  • The access site is sealed

  • The patient is shifted to recovery

Most patients can sit up in a few hours and walk the next day.

Advantages of TAVI

TAVI offers multiple benefits compared to open-heart surgery:

✔ Minimally invasive

No large chest incision or sternotomy.

✔ Faster recovery

Most patients go home in 2–3 days.

✔ Less pain, minimal scarring

✔ Immediate improvement in symptoms

✔ Ideal for elderly & high-risk patients

✔ Lower risk of complications

Especially in those with:

  • lung disease
  • kidney problems
  • previous surgeries
  • frailty

✔ Improved survival in severe aortic stenosis

Especially for those who are too weak for open surgery.

Types of TAVI Valves

1. Balloon-Expandable Valves (e.g., Edwards SAPIEN family)

  • Excellent accuracy
  • Strong radial force
  • Used in calcified, narrow annuli

2. Self-Expanding Valves (e.g., Medtronic CoreValve, Evolut)

  • Lower profiles
  • Better for tortuous vessels
  • Lower gradients

3. Mechanically Expandable Valves

(Emerging category)

Valve choice is based on CT measurements, patient anatomy, and Heart Team decision.

What Happens After TAVI? (Recovery)

Patients are monitored for:

  • Rhythm disturbances

  • Blood pressure

  • Valve function

  • Vascular site healing

Most can:

  • Walk within 24 hours

  • Resume routine activities in 1 week

  • Resume full normal life in 2–3 weeks

Doctors recommend:

  • Light physical activity

  • Heart-healthy diet

  • Blood thinners/antiplatelets for prescribed duration

  • Regular follow-up ECHOs

Risks and Complications of TAVI

(TAVI is safe, but all procedures carry some risk)

Possible complications include:

  • Bleeding at catheter site

  • Conduction problems requiring pacemaker

  • Stroke (rare)

  • Paravalvular leak

  • Aortic injury (very rare)

  • Kidney issues from contrast dye

Today, with modern devices and expert teams, serious complications are very uncommon.

Long-Term Outcomes: How Durable Is a TAVI Valve?

Studies show:

  • Excellent durability up to 10 years

  • Comparable to surgical bioprosthetic valves

  • Outstanding symptom relief

  • High patient satisfaction

  • Improved survival & quality of life

Dr. Svati Bansal
Dr. Vikas Kumar Keshri

MBBS, MS, MCh, FRCS-CTh,
FRCS-CTh(Ed), MEBCTS, FEBCTS, FACS(USA), DNB, MNAMS, MBA

Associate Director
Cardio-thoracic and Vascular Surgery
Yashoda Medicity, Ghaziabad(UP)

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Frequently Asked Questions

Is TAVI better than open-heart surgery?

For elderly or high-risk patients — yes.
For younger, low-risk patients — decision depends on Heart Team evaluation.

Most centres use conscious sedation, not full anesthesia.
Some cases require general anesthesia.

Current data shows 8–12 years or more with excellent performance.

Yes, many patients walk within 8–12 hours.

No.
Only mild groin discomfort is common.

Most patients resume daily activities within 1–2 weeks.

Only in some cases (varies between valve types and anatomy).

It expands and anchors firmly inside the old, calcified valve.

Yes — “valve-in-valve TAVI” is possible.

Yes — in fact, TAVI is preferred over open surgery for such patients.

For any queries on this topic

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