TEVAR (Thoracic Endovascular Aneurysm Repair): A Minimally Invasive Solution for Thoracic Aortic Aneurysms

Have you ever imagined how doctors can “patch” the main blood vessel inside the chest without opening the chest at all? A thoracic aortic aneurysm, a dangerous widening of the largest blood vessel in the human body, can burst at any time and threaten your life. However, thanks to advances in medical technology, there is now a treatment option that needs only minimal incisions: TEVAR (Thoracic Endovascular Aortic Repair). This procedure allows doctors to repair a weakened aortic wall through just a small incision in the thigh, without the need for major surgery.

TEVAR has become a new source of hope, especially for older patients or those who would face a high risk if they underwent open surgery. When performed by an experienced specialist, this procedure can be an option with a lighter recovery process.

01 / Cardiovascular Therapy

What Is TEVAR (Thoracic Endovascular Aortic Repair)?

TEVAR (Thoracic Endovascular Aortic Repair) is a minimally invasive surgical procedure that aims to reinforce a weakened thoracic aortic wall without opening the chest. It is performed through the blood vessels, usually via a small incision in the groin. The doctor inserts a stent graft, a fabric-covered metal tube, through a catheter until it reaches the weakened area of the aorta. Once in place, the stent expands and merges with the aortic wall, diverting blood flow away from the weakened area. As a result, blood pressure no longer strains the weak part of the aorta, so the risk of rupture or dissection can be prevented.

This procedure is known to be safer than conventional open surgery because it does not require major surgery to open the chest cavity, only a catheter guided through the blood vessels. After the stent graft is placed and its position is confirmed with X-rays (fluoroscopy), the catheter is removed, and the small incision is closed with stitches or a bandage.

02 / Cardiovascular Therapy

Who Needs TEVAR?

TEVAR is intended for patients with a range of serious thoracic aortic conditions. Here are the main categories of candidates for this therapy:

1. Patients With a Significant Thoracic Aortic Aneurysm

A thoracic aneurysm is considered significant when the diameter of the aorta widens beyond the safe limit, usually around 5.5 cm. According to the CHEST guidelines and the 2010 American Consensus, TEVAR is strongly recommended for aneurysms with a diameter of ≥ 5.5 cm or those that grow rapidly (more than 0.5 cm in 6 months), as well as for saccular aneurysms or pseudoaneurysms. By placing a stent graft, the risk of aneurysm rupture can be effectively reduced.

2. People With Thoracic Aortic Dissection

In type B dissection (a tear in the lining of the aorta in the lower part of the chest), TEVAR is used to seal the tear and restore blood flow. Guidance from the Society of Thoracic Surgeons states that TEVAR is the primary option for acute or subacute dissection if complications are present and the anatomy is suitable. This procedure can lower mortality compared with medical therapy or open surgery.

3. Aortic Trauma Cases (Tears Caused by Accidents)

Aortic injuries caused by trauma, such as traffic accidents or severe impacts, can cause life-threatening tears. Since FDA approval in 2012, TEVAR has been increasingly used to treat this condition. Its main advantages: rapid repair without fully opening the chest and a lower risk of complications than open surgery.

4. Other Complex Aortic Conditions, Such as Stenosis or Branch Aneurysms

In complex aortic disease, for example when large branch vessels are involved or the disease is in a difficult location, doctors can use special stent grafts such as fenestrated or branched grafts. This technology creates openings or branches in the stent to preserve blood flow to important vessels, such as in the aortic arch or near organs like the kidneys. Older patients with complex aneurysms may also benefit; one study showed good results even in patients in their eighties.

5. Other Risk Factors: Advanced Age & Multiple Comorbidities

TEVAR can be an option for older patients or those in poor health (such as people with heart disease, respiratory problems, or kidney disease). Because TEVAR is physiologically less demanding, the procedure places less stress on the body than open surgery. Advanced age and multiple comorbidities are major considerations in choosing TEVAR.

Key Facts:

• In the United States, thousands of patients undergo TEVAR each year, mostly for aneurysms and dissections, and a small proportion for trauma cases.
• TEVAR has been used since 2005 and has become an increasingly common procedure because it has shown lower mortality and complication rates than open surgery.

03 / Cardiovascular Therapy

The TEVAR Procedure

TEVAR (Thoracic Endovascular Aortic Repair) is a minimally invasive procedure. Here are its stages:

1. Preparation

Before the procedure, the patient will undergo CT angiography to map the condition of the aorta and the access vessels (for example, the femoral artery). The doctor uses this map to determine the optimal size and position of the stent graft.

The patient will also receive a full explanation of the procedure, possible complications, and restrictions on food and medications (especially blood thinners), because this preparation is important to reduce the risk of bleeding.

Key Fact: Mapping with CT angiography helps reduce the risk of choosing the wrong stent size.

2. Anesthesia

TEVAR can be performed under general anesthesia or local anesthesia with sedation, depending on the patient’s condition. The goal is to keep the patient comfortable and free of pain during the procedure, while allowing the doctor to work optimally.

3. Arterial Access

The process begins with a small incision (1 to 2 cm) in the inner groin crease to access the femoral artery. Through this incision, the doctor inserts a guidewire (a thin guiding wire) and a special catheter that serve as a channel to the aorta.

Why the Groin?

The femoral artery is large enough for TEVAR devices, while the scar is barely visible once it has healed.

4. Catheter and Stent Placement

With the help of an X-ray device called fluoroscopy, the catheter is guided through the blood vessels until it reaches the aneurysm. The stent graft, already loaded inside the catheter, is then pushed to the target site.

5. Stent Expansion

Once in the correct position, the stent graft is released and expands like a spring, attaching to the aortic wall and replacing the weakened lining. Its main function is to divert blood flow so that it no longer strains the aneurysm.

6. Closure

After the stent is fully deployed, the catheter and guidewire are slowly withdrawn. The doctor closes the wound in the thigh with stitches or a special bandage. In general, a TEVAR procedure takes about 2 hours, faster than open surgery (4 to 6 hours).

Procedure Summary

Stage	Purpose
Preparation	CT angiography, medication management & fasting
Anesthesia	General or local + sedation to keep the patient comfortable
Creating Access	Small incision, insertion of the guidewire and catheter
Catheter Guidance	The catheter and stent graft are guided to the aneurysm site with the help of fluoroscopy
Stent Graft Expansion	The stent graft is released and expands
Closure	Devices removed, stitches/bandage applied, done in ~2 hours

04 / Cardiovascular Therapy

Main Advantages of TEVAR Over Open Surgery

TEVAR (Thoracic Endovascular Aortic Repair) technology has changed the treatment of aortic aneurysms, with 5 key advantages over conventional surgery.

1. Minimal Incisions (Only a Small Scar in the Thigh)

TEVAR only requires a small incision in the groin crease (1 to 2 cm), unlike open surgery, which requires opening the chest or abdomen widely. As a result, postoperative pain is much milder and the wound heals faster. After TEVAR, patients usually experience only mild discomfort, while open surgery often causes severe pain and takes a long time to heal.

2. Faster Recovery

TEVAR patients generally stay in the hospital for only 5 to 7 days, compared with an average of 12 days for open surgery. Light activities can be started soon after recovery, so patients can return to normal life sooner.

3. Lower Risk of Complications

Various studies show that TEVAR patients generally experience fewer complications than open surgery patients, including stroke, kidney failure, and infection.

This is because TEVAR does not involve stopping blood circulation or opening a body cavity.

4. Good Success Rate

In many patients, TEVAR can seal the aneurysm well. A number of studies also show a lower aorta-related mortality rate in the first 30 days with TEVAR than with open surgery.

5. Minimal Bleeding

TEVAR does not require major surgery or aortic clamping, so blood loss during the procedure is relatively small. The need for blood transfusions in TEVAR patients is generally much lower than in open surgery patients. This reduces the risk of anemia and transfusion reactions and supports a faster recovery.

Comparison Summary

Aspect	TEVAR	Open Surgery
Length of hospital stay	Shorter	Longer
Complications	Generally fewer	Generally more
Stroke risk	Lower	Higher
Need for blood transfusion	Less frequent	More frequent
30-day mortality	Lower	Higher

05 / Cardiovascular Therapy

Risks and Side Effects of TEVAR

Although TEVAR (Thoracic Endovascular Aortic Repair) is a minimally invasive procedure with lower risk than open surgery, there are still some possible complications and potential side effects that you should understand.

1. Endoleak

This occurs when blood still flows into the aneurysm sac because the graft does not seal completely. There are several types of endoleak, and types I and III in particular carry a high risk of causing rupture. Data show that TEVAR complication rates can reach 38%, with endoleak among the most common. Patients may need a repeat procedure to fix it.

Key Data:

• Occurs in 10 to 20% of TEVAR cases.
• Many mild endoleaks (type II) can close on their own within a few months.

2. Infection (Very Low Risk)

Although rare, infection can occur at the incision site or in the graft. Long-term studies have reported several cases of graft infection and intraluminal thrombosis during five years of follow-up. Prompt intervention with antibiotics or additional procedures is very important.

3. Graft Migration

After placement, the graft can shift or even collapse, depending on the quality of the placement and the condition of the aorta. This can pose serious risks and require a repeat endovascular procedure or open surgery.

4. Spinal Cord Ischemia (Risk of Leg Paralysis)

Disrupted blood flow to the spinal cord can cause weakness or paralysis (paraplegia). This risk ranges from 0.8% to 8.6%, depending on graft coverage and the patient’s condition. According to research, the average incidence is about 4 to 5%. These symptoms can appear immediately or be delayed, and they are managed through blood pressure control, spinal fluid (CSF) drainage, and other procedures.

5. Heart Attack or Stroke

As with other invasive procedures, TEVAR can trigger a heart attack or a mild stroke due to emboli or changes in blood pressure. This is a serious concern, especially in patients with cardiovascular risk factors.

6. Anesthesia Risks

General anesthesia or sedation is not without risk: there is a potential for drug reactions, nausea, or conditions such as hypotension. However, these risks are generally relatively low and can be controlled by an experienced anesthesia team.

Statistics & Important Notes:

• Average incidence of spinal ischemia: 4 to 5%, ranging from 0 to 10.3% depending on how much of the aorta the graft covers.
• Other studies show permanent/transient paraplegia reaching 3.7 to 6% when the distal aorta is also treated.
• About 19 to 24% of TEVAR patients need a repeat procedure, mostly minor ones (for example, placing an additional cuff or embolization).

Note: A cuff is a part of the stent graft or catheter system used to secure and attach the device to the aortic wall.

06 / Cardiovascular Therapy

Recovery After TEVAR

After undergoing a TEVAR (Thoracic Endovascular Aortic Repair) procedure, optimal recovery requires understanding the stages and the care needed. The following guide is based on current protocols from the Journal of the American College of Cardiology.

1. Early Period

After the procedure, the patient will be monitored in the ICU for 1 to 2 days before being moved to a regular ward. On average, patients can be discharged from the hospital within 1 to 7 days, depending on their individual condition.

2. Temporary Restrictions

Activities that should be avoided:

• Driving (7 to 10 days), as your reflexes may not have fully recovered.
• Lifting loads >5 kg (2 weeks), due to the risk of bleeding at the incision site.
• Strenuous exercise or extreme bending positions.

What you can do:

• Shower with regular water after 48 hours (avoid hot water or soaking in a bath).
• Light walking at home (10 to 15 minutes/day).

3. Gradual Recovery

Activity Stages:

• Weeks 3 to 4: Walking 20 to 30 minutes/day, slowly going up and down stairs.
• Weeks 5 to 8: You can return to office work (non-physical) and stationary cycling.

Supportive Lifestyle:

• Diet: Low in salt (<2,000 mg/day) and high in fiber to control blood pressure.
• Exercise: Light aerobic exercise (brisk walking, swimming) 3 times/week, after consulting your doctor first.

Key Fact: TEVAR patients who walk regularly may have a lower risk of long-term complications.

4. Regular Follow-Up

Routine monitoring is needed to make sure the graft remains stable and no complications occur:

Time	Type of Examination	Purpose
1 month	CT angiography	Make sure the stent is not leaking
6 months	Doppler ultrasound / CT angiography	Monitor blood flow
12 months	CT angiography	Long-term evaluation
Every year	CT angiography / X-ray	Detect new problems early

5. Long-Term Monitoring

For life, patients need to:

• Control their blood pressure, cholesterol, and heart condition.
• Take medications such as antiplatelets or antihypertensives as prescribed.
• Have routine evaluations if they have coexisting conditions (for example, diabetes or heart disease)

Warning!

• Go straight to the emergency department (ER) if you have sudden chest pain, sudden leg weakness, or fainting.
• Do not skip annual follow-ups, because some stent problems only appear after several years.

Additional Tips

• Make sure the incision wound stays clean; if redness, swelling, or pus appears, contact your doctor immediately.
• Follow the CT and consultation schedule on time.

07 / Cardiovascular Therapy

Comparing TEVAR With Open Aortic Surgery

When facing a thoracic aortic aneurysm, patients are often presented with two treatment options: TEVAR (Thoracic Endovascular Aortic Repair) or open surgery. Here is a complete comparison based on the latest guidelines from the European Society for Vascular Surgery.

1. Surgical Technique

• TEVAR is performed through a small incision in the groin crease, using a catheter to place a stent graft without opening the chest or abdomen.
• Open surgery requires a large incision to open the chest or abdominal cavity, and the graft is attached directly to the aorta.

2. Surgical Risks

• A number of studies show higher one-month survival after the procedure with TEVAR than with open surgery.
• TEVAR patients have a lower risk of complications such as chest infections or respiratory failure because the chest cavity is not opened.

3. Recovery Time

Recovery timeline comparison:

Activity	TEVAR	Open Surgery
Hospital stay	1 to 3 days	7 to 14 days
Mobilization	6 to 24 hours	3 to 5 days
Return to work	1 to 2 weeks	6 to 8 weeks
Full exercise	4 to 6 weeks	3 to 6 months

4. Final Outcomes

Similarities:

• Both can seal the aneurysm well.
• Both require long-term routine follow-up.

Advantages of TEVAR:

• Does not disturb other organs (heart, lungs) during surgery.
• Lower risk of nerve problems.
• Better cosmetic results (only a small scar in the thigh).

Points to Note:

• TEVAR requires advanced technology and experienced specialists.
• A repeat operation may be needed if an endoleak occurs (10 to 20% of cases).

08 / Cardiovascular Therapy

Common Myths and the Facts

Myth: “Only major surgery can treat an aneurysm.”

Fact: In many suitable cases, TEVAR can be an alternative to major surgery with a lower procedural risk. The choice of procedure is still determined by the doctor based on the patient’s condition.

Myth: “Once TEVAR is done, the aorta is perfect and no follow-up is needed.”

Fact: Although TEVAR strengthens the aorta, patients still need routine check-ups. The stent needs to be monitored so that it does not shift or leak (endoleak). Your doctor will schedule regular CT angiography as follow-up.

Myth: “After TEVAR, patients can just go home and do not need to rest.”

Fact: Although recovery from TEVAR is faster than from open surgery, patients still need initial rest (a few weeks) and should return to activities gradually. Patients still experience some postoperative discomfort (although mild) and need to follow the doctor’s advice.

Myth: “TEVAR is only for older people.”

Fact: Many aneurysm patients are indeed older adults, but age is not an absolute limit. Anyone with a medical indication (a large aneurysm or dissection) can be considered for TEVAR, including middle-aged patients.

09 / Cardiovascular Therapy

Conclusion

TEVAR (Thoracic Endovascular Aortic Repair) is a major innovation in the treatment of thoracic aortic aneurysms. With a minimally invasive approach through the blood vessels rather than open surgery, TEVAR can divert blood flow away from the weakened part of the aorta, thereby preventing this large blood vessel from rupturing.

Compared with open surgery, TEVAR is easier on the body, has a shorter recovery period, and carries a lower risk of complications. This makes it a suitable option, especially for older patients or those with coexisting conditions (comorbidities).

Early Action Is Very Important

Thoracic aortic aneurysms often develop without noticeable symptoms until one day they can rupture and become a life-threatening condition. Therefore, if you have risk factors such as:

• A long-term history of smoking
• Chronic hypertension
• Advanced age
• A family history of aneurysm

If you begin to experience symptoms such as sharp chest pain, shortness of breath, or a strong pulsing sensation in your chest/back, see a doctor immediately. Early detection and treatment are crucial for your safety.

Consulting a Specialist Is a Wise Step

Not all aneurysms need a procedure. However, if the aneurysm’s diameter keeps growing or it is at high risk of rupture, TEVAR can be an appropriate treatment option.

Talk to a vascular surgeon or a cardiologist. They will help you understand:

1. Whether TEVAR is suitable for your condition
2. The risks and benefits of the procedure
3. Any further examinations or imaging needed

Remember!

An aortic aneurysm is not something that can be put off. Earlier treatment = a greater chance of survival.

TEVAR offers new hope for a safer, more active, and better quality of life for high-risk patients.

10 / Cardiovascular Therapy

Final Thoughts

Heart and blood vessel diseases are often called a “silent killer” because their symptoms are not always felt until the condition is already severe. However, the good news is: with early detection and proper treatment, many cases can be prevented or controlled before they develop into serious complications.

According to the World Health Organization (WHO), most cardiovascular diseases can be prevented through early detection and management of risk factors.

Heart and Blood Vessel Problems Can Be Treated Well

Various cardiovascular disorders, including aortic aneurysms, can be treated effectively when they are recognized and treated early. With technological advances such as Thoracic Endovascular Aortic Repair (TEVAR), patients now have a treatment option that is minimally invasive with a faster recovery time than conventional surgery.

According to data from the American Heart Association, early detection of aortic aneurysms can significantly reduce the risk of death.

Detection and Proactive Action Are Key

If you have risk factors such as:

• A family history of aneurysm or heart disease,
• A smoking habit,
• Chronic hypertension,
• Or you experience unusual sudden chest/back pain,

do not delay seeing a doctor. Early detection is the first step toward protecting your life. Remember, aneurysms often cause no symptoms until a serious complication occurs, such as an aortic tear, which can be fatal.

Do not wait until it is too late.

Have regular heart and blood vessel check-ups. Consult a specialist you trust.

Prevention today is protection for the future!