Aortic Aneurysm Repair

Introduction

If you or someone close to you has been told there is an aneurysm in the aorta, you are probably trying to understand what comes next. Some people are in active surveillance — the aneurysm is being measured every few months or every year, and a decision about repair has not yet been made. Others have already been told that repair is needed and are now planning the procedure. A smaller group are recovering from emergency repair after a rupture or near-rupture.

This article is written for all three readers. It explains what an aortic aneurysm is, why and when doctors recommend repair, the two main ways the repair can be done, what to expect before, during, and after surgery, and what long-term follow-up looks like. The aim is to give you a clear picture of the treatment landscape so that your conversations with your vascular surgeon are easier and more focused.

Aortic aneurysm repair is a major procedure, but it is also a well-established one. For aneurysms that are caught before they rupture, planned repair has good outcomes in most patients, and recovery has improved significantly with the development of less invasive techniques over the past two decades.

What Is Aortic Aneurysm Repair?

An aneurysm is a weakened, bulging section of an artery. When this happens to the aorta, the wall stretches outward like a worn spot on a tyre. If the bulge grows large enough, the wall can tear (a dissection) or burst open (a rupture). A rupture causes massive internal bleeding and is often fatal.

Aortic aneurysm repair is the umbrella term for any surgery that reinforces or replaces the weakened section of the aorta to prevent rupture. There are two main approaches:

• Open surgical repair — a traditional operation in which the surgeon opens the chest or abdomen, clamps the aorta, removes the diseased section, and replaces it with a synthetic tube called a graft.
• Endovascular repair — a less invasive procedure in which a stent graft (a fabric tube reinforced with a metal frame) is threaded up through the arteries in the groin and positioned inside the aneurysm. The stent graft creates a new channel for blood, taking pressure off the weakened wall.

Both approaches have the same goal: to stop the aneurysm from growing further and to remove the risk of rupture. The choice between them depends on where the aneurysm is, its shape, how urgent the situation is, and the patient’s overall health.

Why Is Aortic Aneurysm Repair Performed?

The single reason for repairing an aortic aneurysm is to prevent it from rupturing. An unruptured aneurysm usually causes no symptoms; many are found by chance during scans done for other reasons. A ruptured aneurysm, in contrast, is a catastrophic emergency.

Doctors decide whether and when to repair based on the balance between two risks: the risk that the aneurysm will rupture if left alone, and the risk of the surgery itself. Both risks increase with the size of the aneurysm and with the patient’s other health conditions.

The main factors that push toward repair include:

• Size. The risk of rupture rises sharply once an aneurysm reaches a certain diameter. For abdominal aortic aneurysms, current guidelines from the Society for Vascular Surgery (SVS) and the European Society for Vascular Surgery (ESVS) generally recommend considering repair at around 5.5 cm in men and 5.0 cm in women, although the threshold may be lower if other risk factors are present. For thoracic aneurysms, the thresholds are larger and depend on which segment of the aorta is involved.
• Rate of growth. An aneurysm that is growing more than about 0.5 cm in six months, or 1 cm in a year, is treated as higher risk regardless of its absolute size.
• Symptoms. Pain in the back, abdomen, or chest that appears to come from the aneurysm is taken seriously. New or sudden pain may signal an impending rupture.
• Shape and complications. Saccular (one-sided pouch) aneurysms, aneurysms with thrombus (clot) inside that has caused embolism, and aneurysms that have already started to dissect are treated more aggressively.
• Underlying conditions. Connective tissue disorders such as Marfan syndrome, Loeys-Dietz syndrome, and vascular Ehlers-Danlos syndrome change the rupture risk and often lower the threshold for repair.

If the aneurysm is small and stable, the typical path is surveillance — repeated ultrasound or CT scans every six to twelve months — together with management of blood pressure, cholesterol, and smoking. Repair is not always the next step.

Who Is a Candidate for Repair?

Being told that an aneurysm meets the size threshold does not automatically mean surgery happens immediately. The vascular team also assesses whether the patient is fit enough to undergo and recover from a major procedure.

The assessment usually includes:

• Cardiac evaluation — the heart is under stress during and after surgery, so an ECG, echocardiogram, and sometimes a stress test or cardiology review are done. Coronary artery disease is common in people with aortic aneurysms and may need attention first.
• Lung function — smokers and people with COPD are at higher risk of respiratory complications, particularly after open repair.
• Kidney function — the contrast dye used in endovascular procedures can affect the kidneys, and the aorta near the kidneys is involved in many repairs.
• Detailed aortic imaging — a CT angiogram of the chest, abdomen, and pelvis is essentially always done before planned repair. It shows the exact size, shape, location, and relationship of the aneurysm to nearby branches.
• General fitness — frailty, nutrition, and ability to walk are increasingly considered.

For some patients, the imaging shows an aneurysm shape that is suitable only for open repair, only for endovascular repair, or for a combination. For others, both approaches are technically possible and the choice becomes a discussion between patient and surgeon.

A small number of patients are judged too high-risk for either approach. In these cases, the team may continue surveillance, optimise medical therapy, and reassess as the situation evolves.

Alternatives to Repair

The main alternative to repair is medical management with active surveillance. This is the standard path for aneurysms that have not yet reached the size threshold and for patients in whom surgery would carry an unacceptable risk.

Medical management focuses on slowing aneurysm growth and reducing overall cardiovascular risk. It typically includes:

• Blood pressure control — high blood pressure puts extra force on the aortic wall. Doctors usually aim for tight control, often using beta-blockers or other agents.
• Stopping smoking — smoking is one of the strongest modifiable risk factors for aneurysm growth and rupture. Stopping smoking is the single most important step a patient can take.
• Cholesterol management — statins are commonly used to reduce the burden of atherosclerosis, which often coexists with aneurysmal disease.
• Imaging surveillance — ultrasound for abdominal aneurysms, CT or MRI for thoracic aneurysms, at intervals set by the current size.
• Treatment of related conditions — coronary artery disease, diabetes, and chronic kidney disease are managed in parallel.

Surveillance is not “doing nothing.” It is an active strategy that buys time and allows repair to be planned at the point where its benefits outweigh its risks. Many people live with a small aneurysm for years before any intervention is needed.

It is also worth knowing that repair is not a cure for the underlying arterial disease. New aneurysms can form in other parts of the aorta, and the rest of the cardiovascular system still needs ongoing care.

Surgical Approaches

Aortic aneurysm repair is described by two main features: where the aneurysm is (abdominal or thoracic) and how it is repaired (open or endovascular). The most common combinations are described below.

Open Surgical Repair

Open repair is the original technique and remains an important option, particularly for complex aneurysms and for younger patients in whom long-term durability matters.

For an abdominal aortic aneurysm, the surgeon makes an incision down the centre of the abdomen, or sometimes along the side. The intestines are gently moved aside to expose the aorta. The aorta is clamped above and below the aneurysm, the diseased segment is opened, and a synthetic graft — usually made of Dacron or PTFE — is sewn in to replace it. Blood flow is then restored through the graft.

For a thoracic aortic aneurysm, the incision may be in the chest (thoracotomy) or, for aneurysms near the heart, may require a sternotomy (opening the breastbone). Aneurysms involving the aortic root or arch can involve additional steps such as reimplanting the coronary arteries or the arteries supplying the brain. Some of these operations are done with the support of cardiopulmonary bypass.

Open repair is more invasive and has a longer recovery, but it offers a definitive, durable result. The graft, once in place, does not need the kind of repeated imaging surveillance that endovascular grafts require.

Endovascular Aneurysm Repair (EVAR)

EVAR is the most common technique used today for abdominal aortic aneurysms when the anatomy is suitable. It is performed through small incisions, usually in the groin, with no need to open the abdomen.

The surgeon threads catheters up through the femoral arteries to the aorta under X-ray guidance. A stent graft — a fabric tube on a collapsible metal frame — is delivered to the aneurysm site and then expanded so that it seals against healthy aorta above and below the bulge. Blood then flows through the stent graft, and the pressure on the weakened wall drops. Over time the aneurysm sac usually shrinks.

EVAR has a shorter hospital stay, less pain, faster recovery, and lower short-term mortality than open repair. The trade-off is that the stent graft can develop problems over time — leaks at the seal (called endoleaks), graft migration, or device fatigue — which is why lifelong imaging surveillance is required after EVAR.

EVAR is suitable only when the anatomy fits: there needs to be enough healthy aorta above and below the aneurysm to anchor the graft, and the access arteries need to be wide and straight enough to deliver the device. When the anatomy is complex, branched or fenestrated stent grafts (with custom openings for the kidney and intestinal arteries) can extend EVAR to more patients, but these are more specialised procedures.

Thoracic Endovascular Aortic Repair (TEVAR)

TEVAR is the endovascular technique applied to thoracic aneurysms — aneurysms in the part of the aorta that runs through the chest. The principle is the same as EVAR: a stent graft is placed inside the aneurysm to seal it off.

TEVAR is most commonly used for descending thoracic aortic aneurysms, certain types of aortic dissection, and traumatic aortic injuries. Aneurysms involving the aortic arch (where the arteries to the brain branch off) and the aortic root (near the heart) are more complex and may require hybrid procedures combining endovascular and open techniques.

Like EVAR, TEVAR offers a faster recovery than open thoracic surgery but requires long-term imaging follow-up.

Hybrid and Complex Repairs

Some aneurysms span multiple zones of the aorta or involve major branches, and cannot be cleanly treated with a standard stent graft or a standard open operation. In these cases the team may use a hybrid approach: an open operation to reroute important branch arteries (for example, the arteries supplying the kidneys or the brain) followed by an endovascular stent graft. Branched and fenestrated grafts are also used in specialised centres to address complex anatomy.

These operations are longer and carry higher risk, and they are usually performed in centres with high case volumes and specialised teams.

Preparing for Aortic Aneurysm Repair

Key steps typically include:

• Stopping smoking. Even a few weeks without smoking before surgery measurably reduces the risk of lung and wound complications. Many teams insist on it.
• Optimising blood pressure and heart medications. Beta-blockers, statins, and antiplatelet agents are commonly used; the surgical team will tell you which to continue and which to pause before the procedure.
• Reviewing all medications and supplements. Blood thinners often need to be stopped or bridged. Diabetes medications need to be adjusted for the fasting period.
• Dental and infection check. Any active infection — including dental abscesses — is treated before a graft is implanted, because a synthetic graft can become a focus for infection.
• Pulmonary preparation. Breathing exercises, walking, and sometimes physiotherapy in the weeks before surgery improve lung function and recovery.
• Nutrition and weight. Adequate protein intake and reasonable nutritional status help wound healing.

In the days before the procedure, you will have repeat blood tests, a final review with the anaesthetist, and detailed discussion about consent. You will be told when to stop eating and drinking, and which medications to take with a small sip of water on the morning of surgery.

For elective endovascular repair, hospital admission is often on the day of the procedure. Open repair usually involves admission the day before.

What Happens During Aortic Aneurysm Repair

What happens in the operating room depends on which approach is being used. The descriptions below cover the most common scenarios.

During Open Repair

You are taken to the operating room and given general anaesthesia, so you are completely asleep. Several lines are placed to monitor blood pressure closely and to allow rapid transfusion if needed. A urinary catheter and a tube into your stomach may also be placed.

The surgeon opens the abdomen or chest, gradually exposes the aorta, and prepares the segments above and below the aneurysm. Heparin is given to thin the blood. The aorta is clamped, the aneurysm is opened, and the graft is sewn into place. Once blood flow is restored through the graft, the clamps are removed and the team checks for bleeding.

An abdominal open repair typically takes three to six hours. Thoracic procedures can take longer, especially if branch vessels need to be reconstructed.

After surgery you go to the intensive care unit (ICU) for close monitoring, usually for one or two days.

During Endovascular Repair (EVAR or TEVAR)

Endovascular repair is often done under general anaesthesia, although regional or local anaesthesia with sedation is sometimes used. Small incisions or needle punctures are made in the groin to access the femoral arteries.

Working under continuous X-ray imaging, the surgeon advances guidewires up to the aorta. The stent graft, compressed inside a delivery catheter, is positioned across the aneurysm, then released and expanded. Additional components may be added to extend the graft into the iliac arteries (in the case of EVAR) or to seal more challenging segments.

Contrast dye is injected to confirm that the stent graft is sealing properly and that the aneurysm is no longer being filled with high-pressure blood. Once the team is satisfied, the catheters are removed and the groin incisions are closed.

After Endovascular Repair

Most patients go home one to three days after EVAR or TEVAR, provided there are no complications. The groin incisions are small and usually heal quickly. Common experiences in the first week include:

• Bruising and mild discomfort at the groin sites
• Tiredness and reduced appetite
• Occasional low-grade fever and a feeling of being unwell during the first few days — sometimes called post-implantation syndrome — which usually settles on its own
• Restrictions on heavy lifting, typically for two to four weeks

Most people return to light activity within a week or two and to normal daily routines within four to six weeks. Driving usually resumes after the first follow-up visit, when the surgeon confirms recovery is on track.

After Open Repair

Recovery from open repair takes longer. Hospital stays typically range from five to ten days, sometimes more for complex thoracic procedures. After discharge, expect:

• Significant fatigue for the first several weeks
• Pain at the incision site, gradually decreasing
• A slow return of appetite and bowel function (particularly after abdominal repair)
• Restrictions on lifting heavier objects for six to eight weeks while the abdominal or chest wall heals
• A gradual ramp-up of walking and gentle activity, usually with the help of a physiotherapy plan

Most people resume light office work after about six to eight weeks; physical work takes longer. Full return to pre-surgery energy levels can take three to six months.

For both approaches, walking is one of the most important parts of recovery. It reduces the risk of blood clots, helps lung function, and improves circulation and mood. Surgeons usually encourage progressive daily walking from very early on.

Risks and Complications

Aortic aneurysm repair is major surgery on the body’s largest blood vessel. Risks vary by approach, by the aneurysm’s location and complexity, and by the patient’s overall health. The discussion below covers the most important categories; your surgeon will give you personalised estimates.

Short-term Risks

Risks in the immediate postoperative period include:

• Bleeding — sometimes requiring transfusion or return to the operating room
• Heart complications — heart attack, irregular rhythm, or heart failure, particularly in patients with existing coronary disease
• Kidney injury — the kidneys are vulnerable both to reduced blood flow during open repair and to contrast dye during endovascular procedures
• Lung complications — pneumonia and respiratory failure, more common after open repair and in smokers
• Blood clots — deep vein thrombosis and pulmonary embolism
• Bowel ischaemia — loss of blood supply to part of the intestine, an uncommon but serious complication, particularly after repair of aneurysms involving the lower abdomen
• Spinal cord injury — a rare but serious risk of thoracic repair, which can cause weakness or paralysis in the legs. Special techniques such as spinal fluid drainage are used to reduce this risk
• Stroke — a risk especially when the aortic arch is involved
• Wound infection

Risks Specific to Endovascular Repair

Endovascular repair has its own pattern of complications:

• Endoleaks — blood continuing to enter the aneurysm sac around or through the stent graft. Some endoleaks resolve on their own; others need treatment.
• Graft migration — the stent graft moving from its original position over time
• Limb occlusion — blockage of one of the graft’s lower extensions, reducing blood flow to a leg
• Access site complications — bleeding, false aneurysms, or injury at the groin puncture sites

These device-related issues are the reason lifelong imaging surveillance is required after EVAR and TEVAR.

Risk of Death

Mortality is the risk patients most want to understand. The number varies widely depending on whether the surgery is elective or emergency, on the approach, and on the patient’s condition.

For elective abdominal aortic aneurysm repair, mortality is generally low, and is typically lower with EVAR than with open repair in the short term. For emergency repair after rupture, mortality is far higher — this is exactly why elective repair before rupture is offered. Thoracic and complex repairs carry higher risks than standard abdominal repairs.

Your surgical team will discuss the numbers in your specific situation. Personalised estimates depend on your aneurysm and your overall health, not on general averages.

Life After Aortic Aneurysm Repair

Repair fixes the immediate problem — the bulging segment — but the underlying tendency to vascular disease remains. Life after repair has two main themes: looking after the repair itself, and looking after the rest of the cardiovascular system.

Follow-up and Surveillance

After open repair, follow-up is usually less intensive: a few imaging studies in the first year, then less frequent scans depending on findings and on whether other parts of the aorta are being watched.

After endovascular repair, surveillance is lifelong. Typical schedules include CT or ultrasound scans at one month, six months, and twelve months after the procedure, then yearly thereafter, although the protocol varies by centre and by the specific device. The scans look for endoleaks, sac size changes, graft position, and any new aneurysm formation elsewhere in the aorta.

Missing these appointments matters. A small endoleak that is detected early can often be fixed with a relatively minor procedure; one that is missed for years can lead to sac expansion and a return of rupture risk.

Medications

Most patients continue with blood pressure medications, statins, and often an antiplatelet drug such as aspirin after repair. Tight blood pressure control reduces stress on the rest of the aorta and on any stent graft. These medications are usually for life.

Lifestyle

The same lifestyle measures that slow aneurysm growth also reduce the risk of new aneurysms and protect the heart and brain:

• Not smoking — this remains the single most important step
• Regular moderate exercise — walking, cycling, and similar aerobic activity, building back gradually after recovery
• A heart-healthy diet — rich in vegetables, fruits, whole grains, fish, and pulses; lower in salt, saturated fats, and ultra-processed foods
• Limiting alcohol
• Managing diabetes and cholesterol well

Most surgeons advise avoiding very heavy lifting (such as competitive weightlifting) in the long term, because sudden large pressure spikes can stress the aorta. Light strength training is usually fine once recovery is complete.

Returning to Work and Daily Life

People with desk-based work generally return within four to six weeks of EVAR and six to eight weeks of open repair. Heavier physical work usually requires longer — sometimes three months or more after open repair. Most people return to driving, travel, and sexual activity over similar timelines, but exact timing should be confirmed with the surgeon.

Air travel is usually safe once recovery is well established and the surgeon has confirmed it; the timing depends on the type of repair and any complications.

Family Screening

Aortic aneurysms have a familial pattern in some cases, particularly when there is an underlying connective tissue disorder or a strong family history. Many guidelines suggest screening first-degree relatives of people with aortic aneurysms, especially of people diagnosed at a younger age. Discuss with your team whether family screening is appropriate.

Frequently Asked Questions

How urgent is repair once an aneurysm reaches the size threshold?

For elective repair, “urgent” usually means “planned in the coming weeks,” not the next day. There is time to complete the work-up, plan the approach, optimise health, and choose an appropriate centre. Truly emergency repair is reserved for ruptures, near-ruptures, and aneurysms causing acute symptoms.

Will I feel the stent graft inside me?

Most people do not feel the stent graft. It is positioned inside the aorta and becomes covered with tissue over time. Some patients are aware of it in the first few weeks but rarely afterwards.

Can the aneurysm come back after repair?

The repaired segment itself does not generally re-form an aneurysm. However, the rest of the aorta is still at risk, and new aneurysms can develop in other segments. After endovascular repair, endoleaks can cause the original aneurysm sac to remain pressurised, which is why surveillance scans are essential.

Is open repair outdated?

No. Endovascular repair has become the more common approach for suitable abdominal aneurysms, but open repair remains the standard for many complex aneurysms, for patients with unsuitable anatomy for stent grafts, and is often preferred for younger, fitter patients in whom long-term durability is a priority. Major societies continue to describe both as established options, chosen based on individual circumstances.

What happens if I decide not to have repair?

If your aneurysm meets the threshold for repair and you decide against surgery, your team will continue to manage your blood pressure, cholesterol, and other risks, and to monitor with imaging. You should understand that the risk of rupture rises with size and time, and that rupture is frequently fatal. A frank conversation with your vascular surgeon about your personal risk picture is the right way to make this decision.

Can aortic aneurysms be prevented?

Not entirely — some risk is genetic. But not smoking, controlling blood pressure, treating high cholesterol, and managing diabetes all reduce the risk of forming an aneurysm and of having one grow quickly. For people with relatives who have had aortic aneurysms, screening ultrasound may be advised.

Will I need to avoid exercise after repair?

No — in fact, regular moderate exercise is encouraged. What is usually discouraged is very heavy resistance training, contact sports with risk of abdominal or chest trauma, and any activity that causes large, sudden spikes in blood pressure. Your surgeon and cardiologist can guide what is suitable for you.

Are there any restrictions on MRI scans after the procedure?

Most modern stent grafts and surgical grafts are MRI-compatible, but it is worth carrying a card or note with the details of your implant. Tell any future imaging team that you have a stent graft so they can confirm safety.

Conclusion

Aortic aneurysm repair is a well-established treatment for a condition that, untreated, carries significant risk. When the aneurysm is found and watched in time, repair can be planned carefully, and outcomes for elective procedures — both open and endovascular — are good for most patients.

The two main approaches each have advantages. Endovascular repair offers a faster, less painful recovery and a quicker return to daily life, with the trade-off of lifelong imaging follow-up. Open repair is more invasive but offers a durable solution that is well-suited to certain aneurysms and certain patients. Major vascular societies describe both as standards of care, and the choice in any individual case is a clinical decision made together with the surgical team based on the aneurysm’s anatomy, the patient’s overall health, and personal preferences.

After repair, the focus shifts to protecting the rest of the cardiovascular system: not smoking, controlling blood pressure, taking medications as prescribed, exercising sensibly, and attending follow-up scans. With careful long-term care, most people can expect to return to a full and active life after aortic aneurysm repair.