PAD and Carotid Disease
Diagnose and manage peripheral arterial and carotid disease — medical targets, claudication, CLTI, and referral.
Learning Objectives
- 1.Diagnose PAD and recognize critical limb-threatening ischemia.
- 2.Apply medical therapy and risk-factor targets for PAD.
- 3.Recognize carotid disease and when to refer.
Overview
PAD is coronary disease in the legs — it marks high cardiovascular risk and ranges from claudication to limb-threatening ischemia. Carotid disease is a stroke-risk marker. Medical therapy and timely referral are the job.
PAD — presentation & diagnosis
- •Claudication: reproducible exertional calf/leg pain relieved by rest.
- •Rest pain, non-healing wounds, or gangrene = critical limb-threatening ischemia (CLTI) — urgent.
- •Diagnose with the ankle-brachial index (ABI); imaging when intervention is considered.
PAD — medical therapy
- •Antiplatelet therapy and high-intensity statin (PAD is a CAD risk equivalent).
- •Smoking cessation (the single most important intervention) and supervised exercise therapy.
- •BP and diabetes control; cilostazol for claudication symptoms in selected patients.
PAD — when to refer
- •CLTI (rest pain/tissue loss) → urgent vascular referral for revascularization.
- •Lifestyle-limiting claudication despite optimal medical/exercise therapy → vascular evaluation.
Carotid disease
- •Asymptomatic carotid stenosis: medical therapy (antiplatelet, statin, risk factors); selective referral for high-grade stenosis.
- •Symptomatic carotid disease (TIA/stroke in that territory) → urgent referral for revascularization evaluation.
- •A carotid bruit alone doesn’t mandate intervention; correlate with imaging/symptoms.
Red flags / escalation
- •Acute limb ischemia (the 6 P’s) → vascular emergency.
- •TIA/stroke symptoms (FAST) → 911 and urgent evaluation.
- •New rest pain or rapidly worsening wound.
Escalate
Acute limb ischemia and TIA/stroke are time-critical emergencies — escalate immediately; CLTI gets urgent (not routine) vascular referral.
Common beginner mistakes
- •Treating PAD as "just leg pain" and missing its high cardiovascular risk.
- •Under-treating risk factors (statin/antiplatelet/smoking).
- •Missing CLTI or acute limb ischemia.
- •Referring an asymptomatic carotid bruit for surgery without imaging/criteria.
Nurse / MA workflow connection
- •MAs document pulses/skin and flag cold/painful limbs; nurses triage new rest pain or wounds urgently.
Mini cases
Diabetic smoker with calf claudication; ABI is reduced; risk factors not optimized.
Management?
Show answer
Optimize medical therapy: antiplatelet, high-intensity statin, aggressive smoking cessation, supervised exercise, and BP/diabetes control. PAD is a CAD risk equivalent. Reserve revascularization referral for CLTI or limiting symptoms despite therapy.
PAD patient develops constant foot rest pain at night and a non-healing toe ulcer.
What changed?
Show answer
Progression to critical limb-threatening ischemia (CLTI) — urgent vascular referral for revascularization to save the limb, not routine follow-up.