TEVAR for Thoracic Aortic Disease in Singapore

Thoracic endovascular aortic repair, or TEVAR, places a stent graft inside the aorta in the chest. It may be used for a suitable descending thoracic aneurysm, selected aortic dissections or certain other aortic injuries. The aim depends on the diagnosis: excluding an aneurysm from blood flow, covering a dissection entry tear or treating a damaged segment. TEVAR is different from standard abdominal EVAR.

Who may benefit from TEVAR?

An aneurysm does not automatically need repair. Symptoms, expansion, size, shape and the untreated risk are considered alongside your health and life expectancy. Some patients need scheduled imaging and medical treatment; others need an intervention. The aortic disease page explains these conditions.

What about type B aortic dissection?

A new dissection is a hospital problem. A complicated type B dissection, for example one causing rupture or impaired blood supply to organs or limbs, may need urgent intervention, often TEVAR when anatomy is suitable. An uncomplicated dissection is commonly managed initially with monitored blood-pressure treatment. Selected higher-risk cases may later benefit from intervention. The decision is based on the whole clinical picture, not the label alone.

A chronic dissection can remain stable or gradually enlarge into an aneurysm. Increasing size, rapid growth, recurrent symptoms or reduced blood supply to an organ may prompt consideration of repair. TEVAR, more complex endovascular repair or open surgery may be considered according to the anatomy and overall risk. Stable disease may continue with medical treatment and imaging surveillance.

TEVAR does not usually replace emergency open treatment for a dissection involving the ascending aorta near the heart. Disease reaching the arch may need a separate arch repair strategy. Inherited connective-tissue disorders can also change the preferred approach and require specialist discussion.

What determines whether TEVAR is suitable?

Detailed CT imaging assesses the diseased segment, the healthy areas available to seal the graft, the arch branches and the arteries used for access. Previous aortic repairs, kidney function, heart and lung health, and your ability to manage follow-up are relevant.

If a graft needs to cover the origin of an important branch such as the left subclavian artery, the team plans how to preserve necessary blood flow. This may involve a bypass, a different reconstruction or an appropriate branched device. Extensive repairs may be staged to reduce the burden of treatment and address spinal-cord risk. Device selection and availability must be confirmed for the individual plan.

What happens during TEVAR?

The team introduces a stent graft through an artery, usually in the groin, and guides it to the chest aorta using imaging. The fabric-covered device creates a supported channel through the treated segment. Anaesthesia, access incisions and additional procedures vary. The operation takes place in a hospital equipped for the required aortic intervention and for managing complications.

For extensive or complex disease, the plan may include open surgery, several endovascular stages or a combination. Open aortic repair remains an important alternative. A more extensive procedure should have a clear reason, including what remains untreated after each stage.

What are the significant risks?

• Stroke or reduced blood supply to the spinal cord, which can cause leg weakness or paralysis.
• Bleeding, injury or blockage of access arteries, and reduced blood supply to organs or limbs.
• Kidney injury, contrast reactions, heart or breathing complications, infection or death.
• Endoleak, graft displacement or blockage, further tearing of the aorta, continued enlargement and further procedures.

These risks are not identical for every thoracic repair. The length of aorta treated, previous operations, branch-vessel circulation and urgency affect the assessment. Measures to protect the brain and spinal cord are planned by the aortic team; they reduce risk but cannot eliminate it.

How does recovery and follow-up work?

Early monitoring includes blood pressure, kidney function and repeated checks of limb movement and circulation. Some patients need intensive care. Hospital stay and return to usual activity depend on the underlying illness, extent of repair and any complications. The team will advise on medicines, activity, wound care and when to seek urgent help.

Long-term imaging checks the graft and the rest of the aorta. After dissection, untreated segments and the separate blood-flow channels may still change. An early reassuring scan is not a reason to stop follow-up. See aortic stent surveillance and practical aortic follow-up questions.

Questions to ask before treatment

Will TEVAR treat the whole dissection?

Not necessarily. It treats a defined part of the aorta. Blood pressure care, surveillance and sometimes later treatment of other segments remain necessary.

Who should plan a complex repair?

A multidisciplinary aortic team should review options when disease crosses several aortic segments or needs combined techniques. Ask who will coordinate each stage and follow-up.

Arrange a planned aortic review

Contact Andrew Choong Vascular Surgery at Mount Elizabeth Novena Specialist Centre for a non-emergency assessment or second opinion. Bring scan images, reports and previous operation details.

Call 995 for sudden severe chest, back or abdominal pain, collapse or new weakness. The Think Aorta video explains why urgent symptoms should not wait for an appointment.