Revascularization Recommendations for Below-Knee Peripheral Vascular Disease

Absolute Contraindications to Below-Knee Revascularization

• The European Society of Cardiology recommends that revascularization should not be performed in patients with asymptomatic PAD, regardless of anatomic severity, as the risks of intervention outweigh any potential benefit 1, 5
• Revascularization should not be performed solely to prevent progression to chronic limb-threatening ischemia (CLTI), as claudication progresses to CLTI in less than 10-15% of patients over 5 years, and mortality in PAD patients is primarily from cardiovascular events rather than limb-related complications 1, 2, 5
• The American College of Cardiology recommends that revascularization is not warranted when the limb is nonviable with extensive necrosis beyond salvage potential, and primary amputation should be considered after interdisciplinary team evaluation 3, 6

Relative Contraindications and Clinical Scenarios

• The European Heart Journal recommends that revascularization should not be performed in symptomatic PAD patients who have not completed a 3-month trial of optimal medical therapy (OMT) and supervised exercise therapy, and quality of life assessment after the 3-month OMT period should guide the decision for revascularization 1, 5
• In patients with severe comorbidities who have only claudication symptoms, the risks of revascularization may outweigh benefits, but this calculation changes dramatically in CLTI, where revascularization should still be pursued when technically feasible despite comorbidities 5, 6

Critical Pitfalls to Avoid

• An evaluation for revascularization options must be performed by an interdisciplinary care team before amputation in patients with CLTI, as even in high-risk patients, limb salvage rates can be achieved with appropriate revascularization and wound care 3, 6, 7
• The European Heart Journal recommends that CTA, MRA, or catheter angiography should not be performed solely for anatomic assessment in confirmed PAD patients when revascularization is not being considered, to avoid unnecessary contrast exposure, radiation, and procedural risks without therapeutic benefit 8
• Isolated below-knee revascularization for claudication alone is not recommended, and should only be considered in the same intervention as femoro-popliteal treatment if there is substantially impaired outflow 1