Aortic Aneurysm: How It Is Found and When Surgery Is Needed

An aortic aneurysm is a weakened, bulging area in the body’s main artery. Many are found before they cause problems, and treatment depends on the aneurysm’s size, location, growth rate, symptoms, and overall risk of rupture.

Overview: What an Aortic Aneurysm Is

An aortic aneurysm is an abnormal widening or bulging in the wall of the aorta, the large artery that carries blood from the heart to the rest of the body. When part of the aortic wall becomes weakened, pressure from blood flow can cause that area to enlarge over time. This can happen in the chest, called a thoracic aortic aneurysm, or in the abdomen, called an abdominal aortic aneurysm.

Many people do not realize they have an aneurysm because it often develops slowly and may not cause symptoms at first. That is one reason timely imaging and follow-up are so important. Finding an aneurysm early gives doctors a chance to monitor it, reduce risk factors, and decide whether treatment is needed before an emergency occurs.

An aneurysm is not the same as a blockage in the arteries, although both can involve the cardiovascular system. Some people may also have other heart or blood vessel conditions, such as high blood pressure or coronary artery disease, which can affect overall risk and treatment planning.

Symptoms and Warning Signs

Small or slowly growing aortic aneurysms may not cause any symptoms at all. In many cases, they are found during an ultrasound, CT scan, or echocardiogram performed for another reason. This is especially common with abdominal aneurysms.

When symptoms do occur, they often depend on where the aneurysm is located. A thoracic aortic aneurysm may cause chest pain, back pain, hoarseness, coughing, shortness of breath, or trouble swallowing if it presses on nearby structures. An abdominal aortic aneurysm may cause deep abdominal, side, or back pain, or a pulsing sensation in the abdomen.

Sudden, severe pain can be a warning sign of a tear in the aortic wall, called dissection, or of rupture. This can feel like intense chest, back, or abdominal pain and may come with dizziness, fainting, weakness, or signs of shock. These symptoms need emergency medical attention right away.

• Often no symptoms in the early stages
• Chest, back, belly, or side pain
• Shortness of breath, cough, or hoarseness
• Pulsing feeling in the abdomen
• Sudden severe pain requires urgent evaluation

Causes and Risk Factors

Aortic aneurysms can develop for several reasons, but they usually involve weakening of the artery wall over time. Aging is one of the most common contributors. The risk also rises with long-standing high blood pressure, smoking, hardening of the arteries, and a family history of aneurysm.

Some people have inherited connective tissue conditions that increase the chance of aneurysm, especially in the thoracic aorta. Certain valve problems, including aortic regurgitation and aortic valve stenosis, may also be relevant in some patients because the aortic root and valve are closely connected anatomically.

Other possible contributors include previous injury to the aorta, inflammation, and less commonly infection. Men, older adults, and people who smoke or used to smoke have a higher risk of abdominal aortic aneurysm. Good control of blood pressure is especially important because ongoing pressure against a weakened aortic wall can speed expansion.

How an Aortic Aneurysm Is Found

Doctors often suspect an aortic aneurysm based on symptoms, risk factors, family history, or findings on a physical exam. However, imaging is what confirms the diagnosis. The best test depends on whether the aneurysm is thought to be in the chest or abdomen and whether the situation is routine or urgent.

Abdominal ultrasound is a common and reliable way to detect and measure an abdominal aortic aneurysm. For thoracic aneurysms, echocardiography can help assess the aortic root and ascending aorta, while CT angiography or MRI provides a more detailed picture of the aorta’s size, shape, and nearby branches. These tests also help doctors look for signs of dissection, leakage, or pressure on surrounding organs.

Follow-up imaging is a key part of care. Because treatment decisions often depend on exact measurements and whether the aneurysm is changing, regular scans may be recommended every few months or every year, depending on its size and growth pattern. Careful comparison across studies helps determine whether continued monitoring is appropriate or whether repair should be discussed.

When Surgery Is Needed

Not every aortic aneurysm needs immediate surgery. Many smaller aneurysms can be managed safely for a period of time with regular imaging, risk-factor control, and medication when appropriate. The main question is whether the risk of leaving the aneurysm untreated is greater than the risk of repairing it.

Surgery is usually considered when an aneurysm becomes large enough that the risk of rupture or dissection rises, when it grows quickly over a short period, or when it causes symptoms such as pain, pressure effects, or reduced blood flow. The exact size threshold varies depending on whether the aneurysm is in the chest or abdomen, the person’s body size, family history, underlying genetic conditions, and whether the aortic valve or root is involved.

Emergency surgery may be needed if an aneurysm ruptures or if an acute dissection occurs. In planned, non-emergency situations, the timing of surgery is individualized. Doctors weigh imaging findings, symptoms, age, overall health, and heart and lung function to decide on the safest approach.

Treatment Options

Treatment depends on the aneurysm’s location and the person’s overall condition. For some patients, medical management and surveillance are appropriate. This usually includes careful blood pressure control, support for smoking cessation, cholesterol management when indicated, and regular follow-up imaging.

When repair is needed, there are two main approaches. Open surgical repair involves replacing the weakened section of the aorta with a synthetic graft through a traditional operation. Endovascular repair is a less invasive option for selected aneurysms, using a stent graft placed through blood vessels to reinforce the aorta from the inside. Patients may hear this described broadly as endovascular surgery.

The best method depends on anatomy, aneurysm location, urgency, and the patient’s medical condition. Some thoracic aneurysms require complex open procedures, while some abdominal aneurysms can be treated with catheter-based techniques. In specialized centers, care may involve teams experienced in cardiothoracic surgery and interventional cardiology to plan the most suitable repair.

After treatment, lifelong follow-up remains important. Even after successful repair, doctors may recommend imaging to check the graft or stent, monitor the rest of the aorta, and manage cardiovascular risk factors over time.

Prevention, Monitoring, and Self-Care

Although not every aneurysm can be prevented, reducing strain on the blood vessels can lower risk and support long-term health. Stopping smoking is one of the most important steps. Managing blood pressure, staying physically active within a doctor’s advice, eating a heart-healthy diet, and taking prescribed medicines consistently can all help.

People with a known aortic aneurysm should keep all imaging appointments and ask their doctor how often they need follow-up scans. They should also understand what symptoms need urgent attention, especially sudden severe chest, back, or abdominal pain. It is often helpful to keep a written list of medications, previous scan dates, and any changes in symptoms.

Family history matters. If close relatives have had aneurysms, dissections, or certain inherited connective tissue disorders, screening may be recommended for other family members. For international patients seeking coordinated evaluation, Acibadem International’s multidisciplinary specialists in JCI-accredited hospitals diagnose and treat aortic aneurysm with individualized planning and follow-up.

When to See a Doctor

A person should see a doctor if they have persistent chest, back, abdominal, or side pain that is unexplained, especially if they also have risk factors such as smoking, older age, or high blood pressure. Medical review is also important for anyone with a family history of aortic aneurysm or a known connective tissue disorder.

Routine checkups are valuable because many aneurysms are found before symptoms develop. A doctor may recommend screening or imaging if risk is elevated, even when a person feels well. This can be especially helpful in guiding safe monitoring and preventing complications.

Emergency care is needed for sudden severe pain in the chest, back, or abdomen; fainting; sudden weakness; or signs of shock. These symptoms do not always mean an aneurysm problem, but they should never be ignored because rapid assessment can be lifesaving.

Frequently asked questions

Can an aortic aneurysm be present without symptoms?

Yes. Many aortic aneurysms do not cause symptoms, especially when they are small or growing slowly. They are often found during imaging tests done for another reason or during screening in people with higher risk.

What tests are used to diagnose an aortic aneurysm?

Doctors commonly use ultrasound, CT scans, MRI, and echocardiography to diagnose and measure an aortic aneurysm. The choice depends on where the aneurysm is suspected and how urgently the patient needs evaluation.

Does every aortic aneurysm need surgery?

No. Some aneurysms can be monitored safely with regular imaging and medical management. Surgery is usually considered when the aneurysm is large, growing quickly, causing symptoms, or judged to have a higher risk of rupture or dissection.

What is the difference between open repair and endovascular repair?

Open repair replaces the weakened section of the aorta with a graft through a traditional operation. Endovascular repair places a stent graft inside the aorta through blood vessels, usually with smaller incisions, but it is only suitable for certain aneurysm shapes and locations.

Can lifestyle changes help if someone has an aortic aneurysm?

Yes. Stopping smoking, controlling blood pressure, following a heart-healthy diet, and keeping follow-up appointments are all important. These steps do not remove an aneurysm, but they can help slow progression and reduce complications.

Is an aortic aneurysm the same as an aortic dissection?

No. An aneurysm is a bulging, weakened area in the aorta, while a dissection is a tear in the inner layer of the aortic wall. However, an aneurysm can increase the risk of dissection, which is why monitoring and timely treatment matter.

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.