Vascular surgeons are the primary specialists who treat abdominal aortic aneurysms (AAA), but several other doctors play important roles depending on the stage of the condition. A small aneurysm found on a screening ultrasound may be monitored for years by your primary care doctor before you ever see a surgeon, while a large aneurysm approaching the surgical threshold involves a more specialized team. Here’s who does what and when.
Primary Care Doctors and Screening
For many people, a primary care physician is the first doctor involved. AAA is often discovered either through a screening ultrasound or by accident during imaging done for something else. Hospital records suggest that about 43% of aneurysms are found incidentally on imaging ordered for unrelated reasons, and roughly 20% of those radiology reports don’t even mention the aorta, meaning some go undetected.
The U.S. Preventive Services Task Force recommends a one-time screening ultrasound for men aged 65 to 75 who have ever smoked (defined as 100 or more cigarettes in a lifetime). Men in that age range who have never smoked may also be offered screening on a case-by-case basis. For women who have smoked or have a family history of AAA, the evidence on screening is less clear, and the decision is left to the individual and their doctor. Physical examination alone catches only about 39% to 68% of aneurysms, so ultrasound is the standard screening tool.
Once a small aneurysm is found, your primary care doctor typically coordinates the surveillance schedule and manages the cardiovascular risk factors that influence how fast it grows.
Surveillance for Small Aneurysms
An aorta measuring 3.0 cm or wider is considered aneurysmal, but surgery isn’t recommended until the aneurysm reaches about 5.5 cm in diameter (some guidelines suggest 5.0 cm for women). In the meantime, regular ultrasound monitoring tracks its growth. The typical schedule works like this:
- 3.0 to 4.4 cm: ultrasound every 12 months
- 4.5 to 5.4 cm: ultrasound every 3 months
- 5.5 cm or larger, or rapid growth (more than 1 cm per year): referral for surgical evaluation
During the surveillance period, the focus is on slowing aneurysm growth and reducing your overall cardiovascular risk. Patients are typically advised to take a statin for cholesterol and an antiplatelet medication. Keeping systolic blood pressure below 140 mmHg, quitting smoking, and reaching normal LDL cholesterol levels can reduce the 10-year risk of cardiovascular events by about 29% in men with a small AAA. Your primary care doctor or a cardiologist may handle these prescriptions and lifestyle interventions, including blood pressure monitoring, dietary guidance, physical activity goals, and smoking cessation support.
Vascular Surgeons
Once an aneurysm reaches the surgical threshold or starts growing rapidly, a vascular surgeon takes the lead. These are the specialists trained to operate on blood vessels throughout the body, and they handle both the decision about whether and when to operate and the surgery itself. The two main surgical options are:
Open surgical repair. This is a major operation done under general anesthesia. The surgeon makes a large abdominal incision, clamps the aorta above and below the aneurysm, removes the widened section, and replaces it with a synthetic fabric graft that is stitched into place. Recovery is longer and more intensive than the minimally invasive alternative, but in some patients it’s the better option based on anatomy or other health factors.
Endovascular aneurysm repair (EVAR). Instead of removing the damaged section, the surgeon threads a collapsed stent graft through a small incision in the groin, guides it into position inside the aneurysm using X-ray imaging, and deploys it. The stent seals off the aneurysm from blood flow while leaving the outer wall in place. Recovery is significantly shorter, and EVAR has become the more commonly performed approach for patients whose anatomy is suitable.
Vascular surgeons perform both procedures and determine which one fits your situation based on the aneurysm’s shape, location, and your overall health.
Interventional Radiologists
Interventional radiologists are doctors who specialize in image-guided, minimally invasive procedures. They were instrumental in developing the EVAR technique and continue to play a major role. A survey of interventional radiologists across Europe found that about two-thirds perform endovascular aortic repairs as part of a multidisciplinary team alongside vascular surgeons. More than half described themselves as equal partners in performing the procedure, and 27% said they act as the primary operator.
Interventional radiologists also handle complications that can arise after EVAR. The most common is an endoleak, where blood continues to flow into the aneurysm sac around the stent graft. Treating endoleaks requires the same image-guided skills used in the original procedure, and this is one of the most frequently performed follow-up interventions by these specialists. Their expertise in pre-procedure planning, imaging interpretation, and catheter-based techniques makes them a key part of the care team for complex or unusual aneurysm anatomy.
The Multidisciplinary Team
In practice, AAA treatment rarely falls to a single specialist working alone. At most hospitals and vascular centers, a team approach is standard. Your primary care doctor coordinates screening and ongoing risk factor management. A cardiologist may get involved if you have heart disease, poorly controlled blood pressure, or need a cardiac evaluation before surgery. A vascular surgeon evaluates the aneurysm and plans the repair. An interventional radiologist may participate in or lead the endovascular procedure and manage any post-operative complications requiring catheter-based treatment. Anesthesiologists and critical care teams are involved for open repairs, which require general anesthesia and a hospital stay.
If you’ve been told you have an AAA, the specialist you’re referred to first will almost always be a vascular surgeon. They serve as the central decision-maker for timing and type of repair. If you’re still in the surveillance phase with a small aneurysm, your primary care doctor is your main point of contact, with periodic imaging to track changes in size.