Aortic Aneurysms
What Is an Aortic Aneurysm?
An aortic aneurysm is an abnormal bulge that forms in the wall of the aorta, the body’s largest artery, when the vessel wall weakens and stretches outward. A segment of the aorta is generally considered aneurysmal once it measures at least 50% wider than its normal diameter.1
Aortic aneurysms are classified primarily by location. Abdominal aortic aneurysms develop in the portion of the aorta that runs through the abdomen, while thoracic aortic aneurysms develop in the portion that passes through the chest, and each type carries somewhat different risk factors and treatment considerations.2
A widened portion of the aorta qualifies as an aneurysm if it’s at least 50% wider than the normal aortic diameter.
Cleveland Clinic
Types of Aortic Aneurysms
Thoracic aortic aneurysms are further classified by which part of the chest aorta they affect. About 60% of all thoracic aortic aneurysms involve the ascending aorta, the segment closest to the heart, while others affect the aortic arch or the descending thoracic aorta.2
Abdominal aortic aneurysms, covered in more detail on our dedicated abdominal aortic aneurysm page, are generally more common overall and are strongly associated with smoking history and atherosclerosis, while thoracic aneurysms are more often linked to genetic connective tissue conditions and long standing high blood pressure.3
Causes
Aortic aneurysms form when the aortic wall is weakened by a combination of factors, including atherosclerotic plaque buildup, chronic high blood pressure, and, in some cases, underlying connective tissue disorders that affect the strength of the vessel wall from birth.3
Additional contributing factors include male sex, smoking, elevated cholesterol, inflammation of the blood vessels, and, less commonly, untreated infections that damage the aortic wall directly.3
Symptoms
Aortic aneurysms, particularly smaller ones, frequently cause no symptoms at all and are often discovered incidentally during imaging performed for another reason.1
When thoracic aneurysms do cause symptoms, they can include difficulty swallowing, hoarseness, or signs resembling heart failure, such as cough, shortness of breath, or leg swelling, all resulting from the enlarged aorta pressing on nearby structures.2
Risk Factors
Risk factors shared across most aortic aneurysms include older age, smoking, high blood pressure, and a family history of aortic disease. Thoracic aneurysms are additionally linked to inherited connective tissue disorders, which can weaken the aortic wall independent of typical cardiovascular risk factors, meaning some patients develop aneurysms at a younger age than typically expected.3
Complications
The most serious complication of any aortic aneurysm is rupture, in which the weakened vessel wall tears, causing severe internal bleeding that requires emergency treatment. Aortic dissection, a related but distinct condition in which the layers of the aortic wall separate, is a particular concern with thoracic aneurysms and can occur even before an aneurysm reaches a size that would typically prompt elective repair.1,2
Treatment
Small, asymptomatic aneurysms are generally monitored with regular imaging to track growth over time, alongside medical management of blood pressure and cardiovascular risk factors.1
Larger or symptomatic aneurysms typically require repair, either through open surgery, in which the weakened section of aorta is replaced with a graft, or through endovascular repair, a minimally invasive approach in which a stent graft is guided through the arteries using a catheter to reinforce the aneurysm from within.4
Prevention
While genetic risk factors cannot be changed, modifiable risk factors can meaningfully reduce the likelihood of aneurysm formation or progression. These include not smoking, controlling blood pressure, managing cholesterol, and attending recommended imaging or screening appointments, particularly for people with a family history of aortic disease.3
Why visual communication matters for aortic aneurysms?
Because aortic aneurysms can develop in different regions of the aorta with different underlying causes and treatment approaches, patients often find it difficult to understand where their specific aneurysm is located, why it formed, and how thoracic and abdominal aneurysms differ in management.
Medical illustrations and animations can clearly map the aorta’s anatomy from the chest through the abdomen, show how each aneurysm type forms and progresses, and walk patients through open and endovascular repair techniques in a way that supports genuinely informed treatment decisions.4
Visual communication can support:
- Aortic anatomy education across thoracic and abdominal regions
- Comparison of thoracic and abdominal aneurysm risk factors and progression
- Open surgical repair and endovascular repair demonstrations
- Imaging and screening education
- Patient informed consent resources
- Healthcare professional training
- Clinical trial and research communication
How Biotic Artlab supports aortic aneurysm communication
At Biotic Artlab, we transform complex vascular anatomy, surgical procedures, and scientific information into clear, accurate medical illustrations and animations.
We collaborate with healthcare organizations, medical device developers, researchers, and publishers to create educational content that supports patient education, clinician training, and scientific communication.
Whether you’re explaining the difference between thoracic and abdominal aneurysms, demonstrating endovascular repair, or presenting clinical research findings, we create scientifically accurate illustrations and animations that improve understanding without oversimplifying the science.
Our services include:
- Medical illustration
- 3D medical animation
- Scientific illustration
- Interactive medical education
- Scientific figures for publications
- Conference and presentation graphics
- Medical device visualization
Frequently Asked Questions
What is the difference between a thoracic and an abdominal aortic aneurysm?
A thoracic aortic aneurysm develops in the portion of the aorta within the chest, while an abdominal aortic aneurysm develops in the portion within the abdomen. Thoracic aneurysms are more often linked to genetic connective tissue conditions, while abdominal aneurysms are more strongly tied to smoking and atherosclerosis.2,3
Do aortic aneurysms always cause symptoms?
No, many aortic aneurysms, especially smaller ones, cause no symptoms and are often found incidentally during imaging performed for an unrelated reason.1
What size aneurysm requires treatment?
Treatment thresholds vary by location and patient factors, but repair is generally considered once an aneurysm reaches a size associated with meaningfully increased rupture risk, or if it’s causing symptoms or growing rapidly. This should always be determined individually with a vascular specialist.4
What is the difference between an aneurysm and a dissection?
An aneurysm is a bulge in the aortic wall, while a dissection is a tear between the layers of that wall. A dissection can occur in an aneurysmal aorta, but it can also occur in a segment of aorta not previously considered aneurysmal.1,2
Are aortic aneurysms hereditary?
Family history is a known risk factor for both thoracic and abdominal aneurysms, and certain inherited connective tissue disorders specifically raise the risk of thoracic aneurysms.3
What treatment options exist for aortic aneurysms?
Options include ongoing monitoring for small aneurysms, medical management of blood pressure and cardiovascular risk factors, and, for larger or symptomatic aneurysms, either open surgical repair or minimally invasive endovascular repair.4
Have a Project in Mind? Contact Us.
Medical information becomes more effective when people can see what’s happening. We help healthcare organizations and medical device teams communicate complex science through accurate, engaging visual content.
Contact us at info@biotic-artlab.com or get in touch through our contact form to discuss your next project.
References
- Cleveland Clinic. Aortic Aneurysm: Symptoms, Causes & Treatment.
- Cleveland Clinic. Thoracic Aortic Aneurysm: Symptoms & Treatment.
- American Heart Association. Types of Aneurysms.
- Cleveland Clinic. Ascending Aortic Aneurysm: Causes, Symptoms and Treatment.
Disclaimer: This page provides general educational information and is not a substitute for diagnosis, treatment, emergency care, or individualized advice from a qualified healthcare professional.