Abdominal Aortic Aneurysm

What is abdominal aortic aneurysm?

An abdominal aortic aneurysm is a bulge or ballooning in the lower part of the aorta, the large blood vessel that carries blood from the heart through the chest and abdomen to the rest of the body. The aorta is normally about the width of a garden hose. When the wall of the aorta weakens, the pressure of blood flowing through it can cause a section to stretch and swell outward. When this happens in the part of the aorta that runs through the belly (the abdomen), doctors call it an abdominal aortic aneurysm, sometimes shortened to AAA.

Many people ask what is abdominal aortic aneurysm and why it matters if it often causes no discomfort. The main concern is that an aneurysm can slowly enlarge over time, and a large aneurysm may tear or burst. A tear in the layers of the aortic wall is called a dissection, and a full burst is called a rupture. A ruptured abdominal aortic aneurysm causes serious internal bleeding and is a life-threatening emergency. Because of this risk, doctors take even small, symptom-free aneurysms seriously and monitor them carefully.

Abdominal aortic aneurysms are more common in older adults, particularly men over the age of 65, and in people who smoke or have smoked in the past. They can also affect women and younger people, especially those with a family history of aneurysms or certain inherited conditions that affect connective tissue. In hospital systems such as Acibadem, this condition is typically managed by cardiovascular surgery and vascular surgery departments, often working together with cardiology and radiology teams.

Symptoms

Most abdominal aortic aneurysm symptoms appear late or not at all. In fact, the majority of aneurysms cause no symptoms for years and are discovered by chance during an imaging test done for another reason. This silent nature is one of the reasons screening is recommended for certain higher-risk groups.

When an aneurysm does cause symptoms, people may notice:

• A deep, constant pain in the abdomen, the side of the abdomen, or the lower back
• A pulsating feeling near the navel, sometimes described as a heartbeat sensation in the belly
• Back pain that does not go away with rest or position changes
• A feeling of fullness or discomfort after eating only a small amount, in some cases

Symptoms often differ depending on the stage of the aneurysm. A small, stable aneurysm usually produces no symptoms at all. As an aneurysm grows larger, it may begin to press on nearby structures and cause the dull abdominal or back pain described above. New, worsening, or more constant pain can be a sign that the aneurysm is enlarging or becoming unstable, and it should be reported to a doctor promptly.

A ruptured abdominal aortic aneurysm causes very different and much more dramatic symptoms. These typically include sudden, severe, tearing pain in the abdomen or back, dizziness or fainting, a rapid heartbeat, clammy or sweaty skin, nausea, and signs of shock, which means the body is not getting enough blood flow. Rupture is a medical emergency that requires immediate hospital care. The warning signs are listed again in the final section of this page.

Causes and risk factors

Doctors do not always know the exact abdominal aortic aneurysm causes in an individual person, but the condition usually develops when something weakens the wall of the aorta over many years. Several factors are known to contribute:

• Atherosclerosis: a buildup of fatty deposits, called plaque, inside artery walls. Plaque damages and weakens the aortic wall over time and is one of the most common contributors.
• Smoking: tobacco use is the strongest modifiable risk factor. Smoking damages the structure of the aortic wall and is linked to both the development and the faster growth of aneurysms.
• High blood pressure (hypertension): constantly elevated pressure puts extra stress on the aortic wall and can encourage a weakened area to bulge.
• Age and sex: the risk rises with age, and aneurysms are more common in men, particularly after age 65.
• Family history: having a parent or sibling with an aortic aneurysm increases risk, suggesting inherited factors play a role in some families.
• Inherited connective tissue disorders: conditions such as Marfan syndrome or Ehlers-Danlos syndrome affect the proteins that give blood vessels their strength and can lead to aneurysms, sometimes at younger ages.
• Infection or inflammation of the aorta: in rare cases, infections or inflammatory diseases of the blood vessels can weaken the aortic wall.
• Trauma: serious injury, such as from a motor vehicle accident, can occasionally damage the aorta and lead to an aneurysm.

It is important to understand that having one or more risk factors does not mean a person will definitely develop an aneurysm, and some people develop aneurysms without any obvious risk factors. However, controlling the factors that can be changed, especially smoking and blood pressure, is a central part of prevention and ongoing care.

Diagnosis

Abdominal aortic aneurysm diagnosis is based on imaging tests that allow doctors to see the aorta directly and measure its width. A physical examination may sometimes detect a pulsating mass in the abdomen, but examination alone cannot reliably confirm or rule out an aneurysm, particularly in people with a larger body build. Imaging is therefore essential.

• Abdominal ultrasound: this painless test uses sound waves to create pictures of the aorta. It is the most common first test, both for screening people at higher risk and for monitoring known aneurysms over time. It involves no radiation.
• Computed tomography (CT) scan: a CT scan uses X-rays to create detailed cross-sectional images. A CT scan with contrast dye, called a CT angiogram, shows the exact size, shape, and location of the aneurysm and helps doctors plan treatment when a repair is being considered.
• Magnetic resonance imaging (MRI): MRI uses magnetic fields rather than radiation and may be used in certain situations, for example when contrast dye or radiation should be avoided.

In general, doctors describe an abdominal aorta as aneurysmal when it is significantly wider than normal for that section of the vessel; a commonly used threshold is a diameter of about 3 centimeters or more in the abdominal aorta. The measured size, along with how quickly the aneurysm is growing, guides all further decisions.

Because many aneurysms cause no symptoms, screening is recommended in several countries for selected groups at higher risk, most often older men who have ever smoked. Screening usually consists of a single ultrasound examination. Your doctor can advise whether screening is appropriate for you based on your age, sex, smoking history, and family history.

Treatment options

Abdominal aortic aneurysm treatment depends mainly on the size of the aneurysm, how fast it is growing, whether it is causing symptoms, and the person’s overall health. The central goal of treatment is to prevent rupture. There are three broad approaches: careful monitoring, medical management of risk factors, and procedures to repair the aneurysm.

Watchful waiting and monitoring

For small aneurysms that are not causing symptoms, doctors often recommend regular monitoring rather than immediate repair. This is sometimes called surveillance or watchful waiting. It usually involves repeat ultrasound or CT scans at intervals set by your doctor, so that any growth can be detected early. This approach is used because, for small aneurysms, the risk of rupture is generally low and may be lower than the risks of an operation. Monitoring is active care, not neglect; keeping every scheduled imaging appointment is important.

Medication and lifestyle measures

There is currently no medication that can shrink an aneurysm or make it disappear. However, medicines and lifestyle changes play an important role in slowing growth and reducing overall cardiovascular risk. Your doctor may recommend:

• Stopping smoking, which is often the single most important step, since smoking is strongly linked to aneurysm growth and rupture
• Blood pressure medicines to reduce the stress on the aortic wall
• Cholesterol-lowering medicines, such as statins, to slow atherosclerosis
• Healthy lifestyle measures, including a balanced diet, regular moderate physical activity as advised by your care team, and management of other conditions such as diabetes

Endovascular repair (EVAR)

Endovascular aneurysm repair, often shortened to EVAR, is a minimally invasive procedure. Through small incisions in the groin, the surgeon threads a fabric-covered metal tube called a stent graft through the blood vessels and positions it inside the aneurysm. The stent graft creates a new channel for blood flow, taking the pressure off the weakened aortic wall. Recovery is often quicker than after open surgery, and hospital stays are usually shorter. However, EVAR requires lifelong follow-up imaging, because the stent graft can occasionally shift or leak and may need further treatment. Not every aneurysm has a shape suitable for this approach.

Open surgical repair

In open surgery, the surgeon makes an incision in the abdomen, removes or opens the weakened section of the aorta, and sews a durable synthetic tube, called a graft, in its place. Open repair is a major operation with a longer recovery period, but it has a long track record and, once healed, generally requires less intensive long-term imaging follow-up than EVAR. It may be preferred for younger, fitter patients or when the anatomy of the aneurysm is not suitable for a stent graft.

Doctors generally recommend repair when an aneurysm reaches a size at which the risk of rupture is judged to outweigh the risks of the procedure, when it is growing quickly, or when it causes symptoms. A ruptured aneurysm requires emergency repair. The choice between EVAR and open surgery is individualized, and your vascular team will discuss the benefits and risks of each option in your specific situation. At centers such as Acibadem, these decisions are typically made by a multidisciplinary team that includes vascular surgeons, anesthesiologists, and imaging specialists.

Living with abdominal aortic aneurysm / outlook

Being told you have an abdominal aortic aneurysm can be frightening, but it is important to know that many people live for years with a small, stable aneurysm under regular monitoring, and many never need an operation. For those who do need repair, planned (elective) procedures performed before rupture generally have much better outcomes than emergency surgery after rupture. This is why surveillance and timely treatment matter so much.

Day to day, most people with a small aneurysm can continue their normal activities. Your doctor may advise avoiding very heavy lifting or intense straining, and will usually encourage regular moderate exercise such as walking. Practical steps that support long-term health include:

• Quitting smoking and avoiding secondhand smoke
• Taking blood pressure and cholesterol medicines as prescribed
• Attending every scheduled imaging appointment
• Eating a heart-healthy diet and maintaining a healthy weight
• Telling any new doctor or dentist about your aneurysm, and informing close relatives, since screening may be relevant for them

After a successful repair, whether endovascular or open, most people gradually return to their usual routines, although recovery times vary from person to person. People who have had EVAR need lifelong periodic imaging to check the stent graft. No doctor can guarantee that an aneurysm will never grow or that a repair will never need attention again, but with modern monitoring and treatment, the outlook for people whose aneurysms are detected before rupture is, in many cases, good. It is also natural to feel anxious while living with a monitored aneurysm; if worry interferes with daily life, mention this to your care team, as support is available.

Frequently asked questions

What is abdominal aortic aneurysm in simple terms?

It is a weak spot in the wall of the aorta, the body’s main artery, that has bulged outward in the section running through the belly. Think of it like a weak area on a tire that balloons out under pressure. Small bulges are often harmless in the short term and are watched carefully, while large ones may need repair to prevent them from bursting.

How serious is an abdominal aortic aneurysm?

The seriousness depends largely on size and growth. Small aneurysms often carry a low short-term risk and are managed with monitoring and risk-factor control. Large or rapidly growing aneurysms are more serious because the risk of rupture increases with size, and a rupture is a life-threatening emergency. This is why doctors track aneurysms with regular imaging and recommend repair when the risk of rupture begins to outweigh the risk of the procedure.

Can an abdominal aortic aneurysm heal on its own?

No. Once the aortic wall has stretched, it does not return to its normal shape, and there is no medicine known to shrink an aneurysm. However, quitting smoking, controlling blood pressure, and taking prescribed medicines may help slow its growth. The only ways to fix an aneurysm itself are endovascular repair with a stent graft or open surgical repair with a synthetic graft.

What are the first symptoms of an abdominal aortic aneurysm?

In most cases there are no early symptoms at all, which is why aneurysms are often found by chance or through screening. When symptoms do occur, the most common are a deep, steady pain in the abdomen or lower back and, sometimes, a pulsating sensation near the navel. Sudden, severe abdominal or back pain may signal a rupture and needs emergency care.

How is abdominal aortic aneurysm diagnosed?

Diagnosis relies on imaging. An abdominal ultrasound is usually the first test and is also used for screening and follow-up because it is painless and radiation-free. If more detail is needed, especially when planning a repair, doctors typically order a CT scan with contrast dye. An abdominal aorta measuring about 3 centimeters or more in diameter is generally considered aneurysmal.

What is the recovery like after abdominal aortic aneurysm surgery?

Recovery depends on the type of repair. After endovascular repair (EVAR), hospital stays are often short and many people resume light activities within a few weeks, though lifelong imaging follow-up is required. After open surgery, recovery takes longer, often several weeks to a few months, because it is a major abdominal operation. Your surgical team will give you individualized guidance on activity, wound care, and follow-up.

Can abdominal aortic aneurysm be prevented?

Not always, since age, sex, and family history cannot be changed. However, you can lower your risk by not smoking, keeping blood pressure and cholesterol under control, staying physically active, and eating a heart-healthy diet. If you have a close relative with an aneurysm or other risk factors, ask your doctor whether a screening ultrasound would be appropriate for you.

When to see a doctor

See a doctor promptly, without waiting for a routine appointment, if you have a known abdominal aortic aneurysm and you develop new or worsening abdominal, back, or side pain, or any change in how you feel that concerns you.

Call emergency services or go to the nearest emergency department immediately if you or someone near you experiences any of the following, which can be signs of a ruptured or rapidly worsening aneurysm:

• Sudden, severe pain in the abdomen, back, or side, often described as tearing or ripping
• Dizziness, lightheadedness, or fainting
• A rapid heartbeat together with pale, cold, clammy, or sweaty skin
• Sudden low blood pressure, confusion, or loss of consciousness
• Nausea and vomiting accompanying sudden severe abdominal or back pain

Additionally, consider talking with a doctor about screening if you are over 65, have ever smoked, or have a parent or sibling who had an aortic aneurysm. Because an abdominal aortic aneurysm can grow silently, early detection through a simple ultrasound is often the most effective way to stay ahead of the condition.