Management of Back Pain with Atherosclerotic Abdominal Aorta and Common Iliac Arteries

Immediate Clinical Assessment

• The American College of Cardiology recommends ruling out symptomatic aortic aneurysm immediately in patients presenting with back pain and severe aortoiliac atherosclerosis, as this represents a potential rupture 1, 2
• The European Heart Journal suggests obtaining imaging to determine aortic diameter, as symptomatic aneurysms warrant repair regardless of size 1, 3
• Patients with back pain and severe aortoiliac atherosclerosis should be assessed for critical limb ischemia, which would mandate urgent revascularization 4

Medical Management

• The European Heart Journal recommends initiating single antiplatelet therapy with either aspirin 75-160 mg daily OR clopidogrel 75 mg daily, as this is a Class I recommendation for all patients with symptomatic peripheral artery disease to reduce major adverse cardiovascular events 4
• Consider adding rivaroxaban 2.5 mg twice daily to aspirin 100 mg daily if the patient has high ischemic risk and no high bleeding risk, as suggested by the European Heart Journal and the Journal of the American College of Radiology 4, 5
• The American College of Cardiology recommends mandating smoking cessation, controlling hypertension aggressively, and optimizing lipid management to reduce aneurysm expansion risk if present 1, 3

Surveillance Protocol

• If imaging reveals an aneurysm, the American College of Cardiology recommends the following surveillance protocol: AAA <4.0 cm, ultrasound every 2-3 years; AAA 4.0-5.4 cm, ultrasound or CT every 6-12 months; AAA ≥5.5 cm in men or ≥4.5 cm in women, proceed to repair 1, 3

Indications for Revascularization

• Revascularization is indicated for symptomatic aneurysm, critical limb-threatening ischemia, and lifestyle-limiting claudication that fails to improve after 3-6 months of supervised exercise and medical therapy, as recommended by the American College of Cardiology and the European Heart Journal 1, 2, 4, 7
• Rapid aneurysm expansion (>0.5 cm in 6 months) is also a relative indication for revascularization, even if below size threshold, as suggested by Praxis Medical Insights 3

Revascularization Approach

• For aortoiliac occlusive disease, an endovascular-first approach is now preferred, with TASC A and B lesions treated with primary stenting, and TASC C and D lesions treated with endovascular approach as first-line, as recommended by the Journal of the American College of Radiology 5
• Open aortobifemoral bypass is reserved for patients who fail endovascular therapy or have anatomy unsuitable for endovascular approach, with 5-year patency of 85-90%, as suggested by Circulation and Praxis Medical Insights 8, 6