Abdominal aortic aneurysm 


Illustration of abdominal aortic aneurysm

1. aorta
2. heart
3. aortic aneurysm
4. aorta leading away from the heart
5. kidney

Health checks: later years

Once you reach the age of 65, you'll be offered a range of NHS health checks including some specifically for older people

An aneurysm is a bulge in a blood vessel caused by a weakness in the blood vessel wall. As blood passes through the weakened blood vessel, the blood pressure causes it to bulge outwards like a balloon.

Exactly what causes the blood vessel wall to weaken is unclear, though hardening of the arteries, smoking and high blood pressure are thought to increase the risk of an aneurysm.

Read more about the possible causes of an aneurysm.

Aneurysms can occur anywhere in the body, but the two most common places for them to form are in the abdominal aorta and the brain.

This topic is about abdominal aortic aneurysms. Find out more about brain aneurysm.

The abdominal aorta

The abdominal aorta is the largest blood vessel in the body. It is roughly the width of a garden hose. It transports oxygen-rich blood away from the heart to the rest of the body.

It runs in a straight line down from the heart, through the chest and abdomen before branching off into a network of smaller blood vessels.

In most cases, an abdominal aortic aneurysm causes no noticeable symptoms and does not pose a serious threat to health.

However, there’s a risk that a larger aneurysm could burst open (rupture). A ruptured abdominal aortic aneurysm can cause massive internal bleeding, which is usually fatal. Four out of five people with a ruptured aortic aneurysm will die as a result.

The most common symptom of a ruptured aortic aneurysm is sudden and severe pain in the abdomen.

Read more about the symptoms of an abdominal aortic aneurysm.

If you suspect that you or someone else has had a ruptured aneurysm, call 999 immediately and ask for an ambulance.


The aim of treatment is to prevent the aneurysm from rupturing. This is usually done with surgery to replace the weakened section of the blood vessel with a piece of synthetic tubing.

However, preventative surgery carries a small risk of causing serious complications. It's usually only recommended if it’s thought that the risk of a rupture is high enough to justify the risk of surgery.

The size of the aneurysm is often used to measure the risk of it rupturing. Preventative surgery is often recommended for an abdominal aortic aneurysm that's larger than 5.5cm.

A number of non-surgical treatments can also be used to reduce the risk of an aneurysm rupturing. They include a type of medication known as a statin, or quitting smoking if you smoke.

Read more about treating abdominal aortic aneurysm.


In March 2009, the NHS launched a screening service, where an ultrasound scan is used to check men who are 65 years old or over for abdominal aortic aneurysms. The service now covers the whole of England, Wales and Northern Ireland, and will cover the whole of Scotland by the end of 2013.

Men are invited for screening during the year they turn 65. Men over 65 who have not previously been screened can self-refer for a scan by contacting their local screening service directly.

Your GP can still refer men under 65 or women for screening at their local hospital if they feel you have an increased risk of having an aortic aneurysm. For example, this might be the case if you have a strong family history of the condition.

Read more about diagnosing an abdominal aortic aneurysm.

Who is affected?

Abdominal aortic aneurysms are most common in men aged over 65, with around in 1 in 25 men being affected.

The number of aortic aneurysms that rupture is much smaller, with only around 1 in 10,000 people having a ruptured aortic aneurysm in any year in England.

Men are six times more likely to have an aneurysm than women. On average, a ruptured aortic aneurysm occurs 10 years later in women than in men.


The best way to prevent getting an aneurysm, or reduce the risk of an aneurysm growing bigger and possibly rupturing, is to avoid any activities that could damage your blood vessels, such as:

  • smoking
  • eating a high-fat diet
  • not exercising regularly
  • being overweight or obese

Read more about preventing aneurysms.

Page last reviewed: 30/08/2013

Next review due: 30/08/2015


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The 11 comments posted are personal views. Any information they give has not been checked and may not be accurate.

galty said on 26 March 2014

i would be interested to know if anyone has ended up with diastasis recti,(large ridge running down the scar line ) following open surgery on an aortic aneurysm,

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FionnCal said on 07 August 2013

Why are only men having AAA screening. Do women not count. I am 61 and have an Abdominal Aortic aneurysm picked up by a Dr at a medical. Surely with equality all people over 65 should be screened, not just men.

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lindyloo18 said on 07 July 2013

My Husband aged 69 was diagnosed with AAA size 6.3 in January 2013 after many tests he has now been told he is not suitable for the EVAR method and now he has 30% chance of dying on the table due to his lung function and fitness.
Needless to say we are devastated, we would not risk his life and yet he seems fit and healthy apart from the worry about the bomb that could go off at any minute. he had the tests done again last week on the Monday to be told they would be back with the surgeon in time for our visit on Thursday. However the surgeon has not received the tests. so once again six months down the line we are still in turmoil and sick with worry. We have to go back again next week to see how the fitness tests results are back with the surgeon. Not only was the surgeon disappointed , but so are we. my husband has always been fit and active and still has. he has smoked most of his life, but gave up in January this year when his AAA was discovered.
I only hope and pray that they say he is fit enough as without Im not sure how long that we can keep on going.

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Woodie01 said on 20 April 2013

My father is 73,he was in massive pain in lower back and bottom cheeks,ct scan revealed aaa width of 10cm,operated on within 3hours,3days later his leg was amputated above knee due to complications in theatre.he is in his 10th week in hospital,icu,renal and cardiac.due for rehab hospital next week.He is an amazing man,very well loved,does voluntary work for elderly.He has lost 4stone,he's very weak,heartbreaking to see such a great man now so vulnerable.married to my mum for 51years,their life now turned upside down.Please make use of this scan when you are of age.LIfe is so precious.

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cablemandjh said on 13 October 2012

I had a ruptured AAA on the 6/9/2012. The ambo`s were very good. A & E tried thought I had kidney stones & wanted me on a chair in minors, but when the ambo`s tried to get me off the trolley onto the chair and my BP went through the floor they told A & E staff to keep me in the trolley area. It took them 3 or 4 hours to diagnose the AAA rupture at which time I went for emergency surgery. I of course didn`t know much about this as most of the time I was out of it. I woke in intensive care when a really nice nurse said hello Derek you are lucky. It took a day or so to realize how lucky.

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heve said on 29 September 2012

I would like to know why at the moment it's only men being screened, my mother died when her aortic aneurysm ruptured. Surely, as one of the risk factors is having or had a parent or sibling with an aneurysm, anyone over 65 should be screened

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golfclub said on 17 June 2012

any info on iliac aneurysm like size before intervention

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LesSnit said on 31 May 2012

My Dad suffered a fatal ruptured aortic neurysm at the age of 57, my brother has been diagnosed with one at the age of 51. Should I be screened? As a female does is the risk as great?

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MikeC1 said on 11 March 2012

I had a friend who's just had a fatal aortic aneurysm, aged only 52. Perhaps screening should be made available at a younger age?

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brian1953 said on 09 January 2012

You give info on the incidence in men but none for women. Also nothing on inherited predisposition to this condition. Are there any circumstances in which women of whatever age should be screened? This is a very male-oriented article.

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paulkeit said on 17 July 2011

I have an abdominal aortic aneurysm which was re-diagnosed 2 years ago.
i have never been contacted by the hospital (cov uni) since.
should i have expected to have been?

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