Aneurysm

An aneurysm is a bulge or ballooning in the wall of a blood vessel, often caused by a weakened area in the vessel wall. If left untreated, it may rupture, leading to internal bleeding and other life-threatening complications. Aneurysms can occur in various parts of the body, most commonly in the brain and aorta.

There are several types of aneurysms based on location:

• Abdominal Aortic Aneurysm (AAA): Affects the portion of the aorta that runs through the abdomen. This is the most common type of aneurysm and often develops silently over time.
• Thoracic Aortic Aneurysm (TAA): Occurs in the upper part of the aorta, near the chest. These aneurysms can affect the heart and nearby vessels.
• Cerebral Aneurysm (Brain Aneurysm): Occurs in the blood vessels of the brain. Rupture can cause a hemorrhagic stroke or brain bleeding.
• Peripheral Aneurysms: These affect arteries outside the heart and brain, such as the popliteal artery (behind the knee) or femoral artery (in the thigh)
• Visceral Aneurysm: Involves arteries supplying blood to organs like the spleen or intestines.

Understanding the type of aneurysm helps guide treatment and prevention strategies.

Aneurysms develop due to a variety of health and genetic factors. Common causes and risks include:

• Atherosclerosis: Buildup of fatty deposits in the arteries.
• High Blood Pressure: Increases stress on the arteries, leading to weakening over time.
• Smoking: Major contributor to vascular damage.
• High cholesterol
• Male sex
• Family History: A genetic predisposition can increase the risk of developing an aneurysm. Inherited connective tissue disorders such as Marfan syndrome or Ehlers-Danlos syndrome can weaken blood vessel walls, making aneurysms more likely.
• Older age
• Trauma or Injury: Physical damage to arteries.

Most aneurysms don’t show symptoms until they grow large or rupture. When symptoms are present, they can vary by location:

• Aortic: Pulsating sensation in the abdomen, back or chest pain, shortness of breath.
• Cerebral: Sudden, severe headache, blurred vision, neck stiffness.
• Peripheral: Pain or swelling in the affected limb, numbness or cooling in affected area.
• Sudden, severe pain and signs of shock may indicate rupture — a life-threatening emergency.

Seek immediate medical care if you experience symptoms that could indicate a rupture.

Diagnosis depends on the type and location of the aneurysm but often includes imaging tests that allow doctors to see the blood vessels.

• Ultrasound: Non-invasive and commonly used for abdominal and peripheral aneurysms.
• CT Scan (Computed Tomography): Essential for evaluating thoracic and abdominal aneurysms.
• MRI (Magnetic Resonance Imaging): Offers high-resolution images without radiation; useful for brain and complex vascular aneurysms.
• Angiography (CT, MRI, or catheter-based): Uses contrast dye to highlight arteries, often used in surgical planning or interventional procedures.

Men ages 65 to 75 who have ever smoked should receive a one-time ultrasound screening for abdominal aortic aneurysm (AAA), as recommended by national guidelines. If you are a male between 65 and 75 who has never smoked, your healthcare provider may still recommend screening based on additional risk factors such as family history, high blood pressure, or other cardiovascular conditions.

You should also seek evaluation if you have a family history of aneurysms or are experiencing symptoms suggestive of an aneurysm.

Treatment depends on aneurysm type, size, and rupture risk:

• Monitoring (Watchful Waiting): Small or slow-growing aneurysms may be managed with regular imaging and lifestyle changes to reduce risk factors.
• Medications: Control blood pressure and cholesterol through use of Beta blockers, ACE inhibitors, and statins to reduce stress on the vessel wall and slow growth.
• Endovascular Repair (EVAR or TEVAR): Minimally invasive stent placement to reinforce the weakened vessel and prevent rupture.
• Open Surgery: Replaces damaged vessel segment with a synthetic graft.

If not treated, aneurysms can lead to:

• Rupture: Sudden tearing of the aneurysm wall, causing internal bleeding and often life-threatening shock.
• Dissection: A tear in the inner wall of the artery, leading to separation of the vessel layers and possible organ damage.
• Clot Formation: May form within the aneurysm and break off, leading to blockages elsewhere in the body (embolism).
• Compression of Nearby Structures: Aneurysm expansion may press nerves, organs, or other blood vessels, causing pain or dysfunction.

While not all aneurysms can be prevented, you can reduce your risk through:

• Quitting smoking & avoiding tobacco products
• Controlling blood pressure and cholesterol
• Eating a healthy diet
• Exercising regularly
• Getting screened if you're at high risk