Peripheral Artery Disease: When Leg Arteries Narrow

Peripheral artery disease (PAD) is a chronic circulatory condition in which atherosclerosis (the buildup of fatty plaques inside arterial walls) progressively narrows the arteries supplying blood to the limbs — most often the legs — reducing oxygen delivery to muscles and tissues and increasing the risk of limb-threatening ischemia (tissue death from lack of blood flow) and major cardiovascular events.

What Is Peripheral Artery Disease?

Peripheral artery disease belongs to the broader family of atherosclerotic cardiovascular diseases. It develops when cholesterol-rich plaques accumulate inside the walls of the peripheral arteries — the vessels that carry blood away from the heart toward the legs, arms, and organs. Over time, these plaques harden, narrow the arterial channel (a process called stenosis), and may eventually block it entirely.

The legs are by far the most commonly affected region. According to the Global Burden of Disease data cited in current vascular guidelines, PAD affects an estimated 200 million people worldwide, with prevalence rising sharply after age 50. The condition shares the same root cause as coronary artery disease and stroke: atherosclerosis driven by risk factors such as smoking, diabetes, hypertension (high blood pressure), high cholesterol, and physical inactivity.

What makes PAD particularly insidious is that up to half of affected individuals experience no symptoms at all in the early stages. By the time leg pain appears, significant arterial narrowing is already present.

Symptoms: What PAD Feels Like

Symptoms of PAD range from mild and easily overlooked to limb-threatening. They generally progress through recognized clinical stages.

Intermittent Claudication (Most Common Presentation)

The hallmark symptom is intermittent claudication — a reproducible cramping, aching, or tightening pain in the calf, thigh, or buttock that is triggered by walking a predictable distance and relieved within minutes of rest. The pain occurs because narrowed arteries cannot deliver enough oxygen-rich blood to working muscles.

Patients often describe it as a “charley horse” that arrives reliably after, say, two blocks of walking, then disappears when they stop. This pattern is what distinguishes claudication from other causes of leg pain such as nerve compression.

Advanced Symptoms: Critical Limb-Threatening Ischemia (CLTI)

When PAD progresses to its most severe form — critical limb-threatening ischemia (CLTI), formerly called critical limb ischemia or CLI — symptoms include:

• Rest pain: burning or aching in the foot and toes, typically worse at night and partially relieved by hanging the leg over the bed edge
• Non-healing ulcers on the feet or toes
• Gangrene (tissue death), which may require amputation if not treated promptly

A 2026 review in the Indian Journal of Thoracic and Cardiovascular Surgery underscores that CLTI demands a multidisciplinary team approach — involving vascular surgeons, interventional radiologists, diabetologists, wound-care nurses, and physiotherapists — to achieve the best outcomes and reduce amputation rates (Palaniappan N, Khan K, Indian J Thorac Cardiovasc Surg, 2026; PMID: 41835835).

Other Warning Signs

• Cold or pale foot compared to the other leg
• Weak or absent pulse in the foot
• Shiny, hairless skin on the lower leg
• Slow-growing toenails

Diagnosis: What to Expect

If PAD is suspected, your vascular specialist will begin with a clinical history and physical examination, then confirm the diagnosis with one or more of the following tests.

Ankle-Brachial Index (ABI)

The ABI is the cornerstone non-invasive test. A blood pressure cuff and a handheld Doppler (ultrasound probe) are used to measure systolic blood pressure at the ankle and the arm. An ABI below 0.90 is considered diagnostic of PAD.

Toe-Brachial Index (TBI)

In patients with diabetes or significant arterial calcification, the ankle arteries can become stiff and incompressible, giving a falsely normal or elevated ABI. In these cases, measuring pressure at the toe is more reliable. A 2024 Cochrane systematic review confirmed that the toe-brachial index and toe systolic blood pressure are valid diagnostic tools for PAD, particularly in this challenging patient group (Tehan PE et al., Cochrane Database Syst Rev, 2024; PMID: 39474992).

Duplex Ultrasound

Duplex ultrasound combines conventional B-mode imaging with Doppler flow analysis to visualize arterial narrowing and measure blood flow velocities. It is non-invasive, radiation-free, and increasingly used to guide interventions. A 2026 case report described the successful use of complete ultrasound guidance to treat a severely calcified superficial femoral artery lesion using a novel “bamboo spear technique” — illustrating how ultrasound-guided endovascular work is pushing the boundaries of minimally invasive care (Sakamoto Y, Sugimoto A, Am J Case Rep, 2026; PMID: 41937342).

CT Angiography and MR Angiography

Cross-sectional imaging provides detailed arterial roadmaps before surgical or endovascular intervention. CT angiography is widely available and fast; MR angiography avoids radiation and iodinated contrast.

A Note on Rare Mimics

Not every leg artery problem is atherosclerotic PAD. Rare conditions such as adventitial cystic disease — in which mucin-filled cysts develop within the outer wall (adventitia) of an artery, compressing the lumen from outside — can produce claudication-like symptoms in young, otherwise healthy patients. A 2026 case series reported two patients with symptomatic adventitial cystic disease affecting the popliteal artery and femoral vein, highlighting that unusual presentations warrant specialist evaluation (Inoue S et al., J Vasc Surg Cases Innov Tech, 2026; PMID: 41938485).

Treatment: From Lifestyle to Surgery

Management of PAD follows a stepwise approach, guided by symptom severity and the patient’s overall cardiovascular profile. Both the European Society for Vascular Surgery (ESVS) guidelines and the American Heart Association / American College of Cardiology (AHA/ACC) guidelines converge on the same core principles: risk factor modification, supervised exercise, and antiplatelet therapy form the foundation for all patients.

Conservative and Medical Treatment

Cilostazol deserves special mention. This oral medication improves blood flow and walking distance in claudicants. However, a 2026 real-world pharmacovigilance study using the FDA Adverse Event Reporting System found that cilostazol is associated with a distinct adverse event profile — including palpitations and diarrhea — that clinicians should monitor, particularly in elderly patients (Zhang HY et al., Ann Vasc Surg, 2026; PMID: 41713801). Always discuss the benefit-risk balance with your physician before starting cilostazol.

Prevention also extends to the population level. A 2026 German review on prevention and prophylaxis in angiology (the branch of medicine dealing with vascular diseases) emphasized that cardiovascular risk factor management — particularly addressing smoking, diabetes, and hypertension — remains the most powerful tool to prevent PAD and its complications (Müller OJ, Weiss N, Inn Med (Heidelb), 2026; PMID: 41801342).

Endovascular (Minimally Invasive) Procedures

When symptoms significantly impair quality of life or when CLTI threatens limb survival, revascularization (restoring blood flow) is considered. Endovascular options include:

• Balloon angioplasty (PTA): a catheter-mounted balloon inflates inside the narrowed artery to widen it
• Stenting: a metal mesh tube is deployed to keep the artery open after angioplasty
• Atherectomy: a catheter-based device physically removes plaque from the arterial wall

On atherectomy, a 2026 Cochrane review found that while atherectomy devices are increasingly used, there remains insufficient high-quality evidence to establish whether atherectomy is superior to other endovascular strategies for PAD. The reviewers called for better-designed randomized trials before firm recommendations can be made (Pherwani S et al., Cochrane Database Syst Rev, 2026; PMID: 41494151).

Surgical Revascularization

Open bypass surgery — using a vein or synthetic graft to route blood around a blocked segment — remains the gold standard for complex, long-segment occlusions, particularly when endovascular options are not feasible. The choice between endovascular and surgical approaches depends on lesion anatomy, the patient’s fitness for surgery, and the expertise of the treating center.

Prevention: Protecting Your Arteries Every Day

PAD is largely a preventable disease. The following evidence-based habits can significantly reduce your risk — or slow progression if PAD is already present:

1. Stop smoking — the single most impactful intervention. Smokers have a 2–4 times higher risk of PAD than non-smokers.
2. Move daily — even brisk walking 30 minutes a day improves arterial health and collateral (bypass) circulation.
3. Control blood sugar — diabetes accelerates arterial damage; tight glycemic control is protective.
4. Manage blood pressure — target below 130/80 mmHg in most patients with established cardiovascular disease.
5. Eat a heart-healthy diet — Mediterranean-style eating reduces atherosclerosis progression.
6. Know your numbers — regular checks of cholesterol, blood pressure, and blood sugar allow early intervention.
7. Foot care if diabetic — inspect feet daily; even small wounds can escalate rapidly in PAD.

For a deeper dive into vascular prevention strategies, visit our prevention section.

When to See a Doctor

Consult your physician or vascular specialist promptly if you experience:

• Leg pain, cramping, or fatigue that consistently appears when walking and disappears with rest
• Persistent cold, pale, or bluish foot — especially if only one leg is affected
• A wound or ulcer on the foot or lower leg that is not healing normally within two weeks
• Sudden severe leg pain with pallor and loss of pulse — this may indicate acute limb ischemia, a vascular emergency requiring immediate hospital attendance

Do not wait. Early diagnosis and treatment of PAD can prevent amputation, reduce the risk of heart attack and stroke, and dramatically improve quality of life.

Also available in French

Sources

1. Inoue S, Sato A, Yokoyama M, Kono K, Takazawa Y, Matsuyama S. Two cases of symptomatic adventitial cystic disease involving the popliteal artery and femoral vein. J Vasc Surg Cases Innov Tech. 2026 Jun;12(3):102216. DOI: 10.1016/j.jvscit.2026.102216 | PMID: 41938485

2. Zhang HY, Xiao L, Chen K, Du XL, Tang T, Li WD, Liu PC, Li XQ. A Real-World Pharmacovigilance Study of Cilostazol Based on the Food and Drug Administration Adverse Event Reporting System: A Cross-Sectional Disproportionality Analysis. Ann Vasc Surg. 2026 Jun;127:391–400. DOI: 10.1016/j.avsg.2026.01.043 | PMID: 41713801

3. Sakamoto Y, Sugimoto A. Severely Calcified Proximal Superficial Femoral Artery Lesion Treated With Bamboo Spear Technique Under Complete Ultrasound Guidance: A Case Report. Am J Case Rep. 2026 Apr 6;27:e952222. DOI: 10.12659/AJCR.952222 | PMID: 41937342

4. Palaniappan N, Khan K. The multidisciplinary approach in management of critical limb ischemia (CLI): A path to better outcomes. Indian J Thorac Cardiovasc Surg. 2026 Apr;42(4):506–514. DOI: 10.1007/s12055-025-02109-0 | PMID: 41835835

5. Müller OJ, Weiss N. [Prevention and prophylaxis in angiology]. Inn Med (Heidelb). 2026 Apr;67(Suppl 1):40–43. DOI: 10.1007/s00108-026-02076-7 | PMID: 41801342

6. Pherwani S, Gendia A, Sen S, Ambler GK, Hinchliffe RJ, Twine CP. Atherectomy for peripheral arterial disease. Cochrane Database Syst Rev. 2026 Jan 6;1(1):CD006680. DOI: 10.1002/14651858.CD006680.pub4 | PMID: 41494151

7. Tehan PE, Mills J, Leask S, Oldmeadow C, Peterson B, et al. Toe-brachial index and toe systolic blood pressure for the diagnosis of peripheral arterial disease. Cochrane Database Syst Rev. 2024 Oct 30;10(10):CD013783. DOI: 10.1002/14651858.CD013783.pub2 | PMID: 39474992

Medical Disclaimer: This article is produced by the Petit Veinard Editorial Board for informational and educational purposes only. It does not constitute medical advice, diagnosis, or a treatment recommendation. The information presented here reflects the state of published evidence at the time of writing and may not apply to every individual situation. Always consult a qualified physician or vascular specialist before making any decision about your health or treatment. In the event of a vascular emergency — sudden severe leg pain, loss of pulse, or a rapidly non-healing wound — seek immediate emergency medical care.