Peripheral Artery Disease

Introduction

If you have been told you have peripheral artery disease — often shortened to PAD — you are joining a very large group of people worldwide who live with narrowed leg arteries. PAD is common, especially after the age of 50 and in people with diabetes, high blood pressure, high cholesterol, or a history of smoking. It can cause leg pain with walking, cold or numb feet, slow-healing wounds, and in advanced cases, serious problems with the toes or foot.

The good news is that PAD responds well to treatment when it is approached as a long-term condition. Most people who follow a structured plan — risk factor control, supervised walking, medications, and, when needed, a procedure to reopen blocked arteries — see their symptoms improve and their long-term risks come down.

This guide is written for the reader who already has a PAD diagnosis or is being evaluated for one. It explains what is happening inside the arteries, the choices doctors weigh when planning treatment, what to expect from medications, angioplasty, stenting, and bypass surgery, and how to live well with the condition over the long term.

What Is Peripheral Artery Disease?

Peripheral artery disease is a narrowing or blockage of the arteries that carry blood away from the heart to the limbs — most often the legs. The narrowing is almost always caused by atherosclerosis, the same process that causes coronary artery disease and many strokes. Atherosclerosis is the build-up of fatty deposits, cholesterol, calcium, and other material inside the artery wall. These deposits, called plaques, gradually thicken and stiffen the artery and reduce the space through which blood can flow.

When the leg muscles work — for example, when you walk — they need more oxygen. Healthy arteries can deliver it. Narrowed arteries cannot, and the muscle pain you may feel in the calf, thigh, or buttock is the muscle protesting the shortage. This pain is called intermittent claudication, from the Latin word for limping. Rest restores the supply-demand balance and the pain settles within minutes.

As the disease progresses, blood flow can become so poor that the leg hurts even at rest, wounds stop healing, and tissue begins to die. This advanced stage is called chronic limb-threatening ischaemia (CLTI), and it is the point at which the risk of amputation becomes real. Most people with PAD never reach this stage, particularly when the disease is managed actively.

It is important to understand that PAD is not only a leg problem. The same plaque-forming process is usually happening elsewhere in the body too. People with PAD have a higher risk of heart attack and stroke, which is why treatment focuses both on the legs and on protecting the heart and brain.

Types and Stages of PAD

Doctors describe PAD in two main ways: by where the blockages sit, and by how severe the symptoms have become.

By location

• Aortoiliac disease — narrowing in the lower aorta and the iliac arteries in the pelvis. Pain is often in the buttock, hip, or thigh.
• Femoropopliteal disease — narrowing in the artery running down the thigh and behind the knee. This is the most common pattern. Pain is usually in the calf.
• Below-the-knee (infrapopliteal) disease — narrowing in the smaller arteries of the calf and foot. This pattern is more common in people with diabetes and is closely linked with foot wounds.
• Upper limb PAD — less common; affects the arteries of the arm.

By severity

Vascular societies use staging systems (such as Rutherford or Fontaine) to describe progression. In simple terms, the stages are:

• Asymptomatic PAD — narrowing is present on testing but does not yet cause symptoms.
• Intermittent claudication — reproducible leg pain with walking that eases with rest.
• Rest pain — pain in the foot or toes at rest, often worse when lying flat and relieved by hanging the leg down.
• Tissue loss — ulcers or gangrene on the foot or toes.

The last two stages together make up chronic limb-threatening ischaemia and call for prompt specialist assessment.

Causes and Risk Factors

The underlying cause of nearly all PAD is atherosclerosis. The factors that drive atherosclerosis are well established and have been confirmed in large studies over decades.

Strongest risk factors

• Smoking — the single most powerful modifiable risk factor for PAD. Smokers develop PAD earlier, more severely, and respond less well to all treatments. Even one cigarette a day raises risk meaningfully.
• Diabetes — raises PAD risk several-fold and tends to affect the small arteries below the knee. It also increases the risk of foot ulcers and amputation.
• High blood pressure — damages artery walls and accelerates plaque formation.
• High cholesterol, particularly raised LDL cholesterol.
• Age — PAD becomes common after 60 and more so after 70.
• Chronic kidney disease.

Additional contributors

• Family history of vascular disease or early heart disease
• Obesity and lack of physical activity
• A diet high in saturated fats and ultra-processed foods
• Existing coronary artery disease or previous stroke
• South Asian ethnicity, which carries a higher baseline risk of atherosclerosis

A person with several of these factors at once is at much higher risk than someone with just one. Reducing any of them slows the disease, and reducing several can change its trajectory significantly.

Signs and Symptoms to Watch For

If you already have a PAD diagnosis, the symptom list below is less about first recognition and more about knowing what to monitor and what to report to your doctor between visits.

Symptoms that mean PAD is stable or slowly progressing

• Cramping or aching in the calf, thigh, or buttock that comes on after a fairly predictable walking distance and eases with rest
• Cold feet or one foot colder than the other
• Reduced hair growth on the lower legs
• Shiny or thin-looking skin on the lower legs
• Slower toenail growth

Symptoms that suggest urgent review

Tell your vascular team promptly if you notice:

• Pain in the foot or toes at rest, especially at night or when lying flat
• A new ulcer, blister, or sore on the foot that is not healing
• Toes that have turned dark blue or black
• A sudden, severe, cold, pale, painful leg — this can indicate acute limb ischaemia and requires emergency care

Sudden onset of a cold, painful, numb leg is a vascular emergency. Do not wait for a scheduled appointment in this situation.

Diagnosis

PAD is diagnosed through a combination of clinical examination and tests that measure blood flow.

Clinical assessment

A vascular doctor will ask about your walking distance, any rest pain, wound history, smoking, diabetes, and family history. They will examine your legs and feet, feel the pulses at the groin, behind the knee, on top of the foot, and behind the ankle, and look for skin colour changes, hair loss, ulcers, or temperature differences.

Common diagnostic tests

• Ankle-Brachial Index (ABI) — the first-line test. Blood pressure measured at the ankle is compared to blood pressure in the arm. A ratio below 0.9 confirms PAD. Very low values (below 0.4) suggest severe disease.
• Toe-Brachial Index (TBI) — used when ABI is unreliable, especially in people with diabetes or kidney disease whose ankle arteries can be stiff and falsely high-reading.
• Exercise (treadmill) ABI — if symptoms suggest PAD but resting ABI is normal, walking on a treadmill while measuring pressures can unmask the disease.
• Duplex ultrasound — a non-invasive scan that shows narrowings and measures blood flow speed across them.
• CT angiography (CTA) or MR angiography (MRA) — detailed imaging used when a procedure is being planned. CTA is widely available; MRA avoids radiation and is useful in some patients.
• Digital subtraction angiography (DSA) — the gold-standard X-ray dye study of the arteries. It is usually performed at the time of an endovascular procedure rather than as a stand-alone diagnostic test.

PAD is treated as a chronic condition. The treatment plan has three layers: protecting the heart and brain, easing leg symptoms, and (when needed) restoring blood flow with a procedure. Current guidelines from the American Heart Association/American College of Cardiology and the European Society of Cardiology emphasise that medical therapy and exercise are the foundation of care for almost everyone with PAD — not just those with mild disease.

1. Risk factor control and protective medications

These measures reduce the risk of heart attack, stroke, and progression of leg disease. Doctors typically recommend:

• Smoking cessation — described by all major vascular societies as the most important single intervention in PAD. Support can include nicotine replacement, counselling, and medications such as varenicline or bupropion.
• Statin therapy — lowers LDL cholesterol and stabilises plaques. Guidelines recommend high-intensity statins for most people with PAD, with LDL targets typically below 1.4 mmol/L (about 55 mg/dL).
• Antiplatelet therapy — a single antiplatelet such as low-dose aspirin or clopidogrel is standard. After certain procedures or for high-risk patients, a combination of low-dose aspirin and low-dose rivaroxaban (a blood thinner) has been shown to reduce major cardiovascular and limb events.
• Blood pressure control — usually targeting below 130/80 mmHg with medications such as ACE inhibitors or angiotensin receptor blockers, which have additional vascular benefits.
• Diabetes control — with HbA1c targets tailored to the individual. Newer diabetes medications (SGLT2 inhibitors and GLP-1 receptor agonists) have been shown to reduce cardiovascular events in many patients.

2. Supervised exercise therapy

Supervised walking programmes are one of the most effective treatments for intermittent claudication. In a typical programme, you walk on a treadmill or track for 30 to 45 minutes, three times a week, for 12 weeks or more, walking until the leg pain reaches a moderate level, resting, and walking again. Over time, the walking distance before pain steadily increases.

Major societies recommend supervised exercise therapy as a first-line treatment for claudication, often equal to or superior to angioplasty for walking distance over the medium term. Where a formal programme is not available, a structured home-based walking plan with regular follow-up is the next best option.

3. Symptom-targeted medications

Two medications are sometimes used specifically to improve walking distance:

• Cilostazol — can extend pain-free walking distance. It is not used in people with heart failure.
• Pentoxifylline — less effective than cilostazol and used less commonly.

4. Endovascular procedures

When symptoms remain disabling despite medical therapy and exercise, or when there is rest pain, ulceration, or threatened limb loss, doctors consider procedures to reopen the artery. The first choice for most blockages today is an endovascular approach — treatment performed inside the artery through a small puncture, usually in the groin or wrist.

• Balloon angioplasty — a thin catheter with a balloon at its tip is passed to the narrowed segment and inflated to widen it.
• Drug-coated balloons — balloons coated with a medication (often paclitaxel) that helps prevent the artery from re-narrowing.
• Stenting — a small metal mesh tube placed inside the artery to hold it open. Drug-eluting stents are used in selected locations.
• Atherectomy — devices that shave, drill, or vaporise plaque to clear the artery.

Endovascular procedures generally allow same-day or next-day discharge and a quick return to walking. They may need to be repeated over the years as new narrowings develop.

5. Surgical revascularisation

Surgery remains important for long blockages, multiple-level disease, failed previous procedures, or when endovascular treatment is not feasible. The two main operations are:

• Bypass surgery — a new channel for blood is created around the blocked segment. The bypass uses either a vein taken from the leg (often the great saphenous vein, which produces the most durable results) or a synthetic tube. Common bypasses include femoro-popliteal and femoro-distal bypass.
• Endarterectomy — the artery is opened and the plaque is physically removed, then the artery is closed. This is often used in the groin (common femoral endarterectomy).

Surgery involves a longer hospital stay and recovery than endovascular treatment but can offer very durable results in the right anatomy.

6. Care of the foot in advanced disease

When PAD has caused ulcers or threatened tissue loss, treatment requires a team approach: vascular intervention to restore blood flow, wound care to manage the ulcer, infection control, offloading of pressure on the foot, and diabetes management. The goal is healing and limb preservation. Major amputation is considered only when revascularisation is not possible and the limb cannot be salvaged.

Endovascular Procedure: What to Expect

If your team plans an endovascular procedure, the typical experience is as follows.

Before the procedure

• You will have blood tests, including kidney function, because contrast dye is used.
• You may be asked to stop certain medications — or to continue antiplatelets — based on the specific plan.
• You will fast for several hours before the procedure.
• The team will explain the consent form, including risks.

During the procedure

• You are usually awake, with local anaesthetic at the puncture site and light sedation.
• A small puncture is made, most often in the groin (femoral artery) or sometimes the wrist or arm.
• A thin guidewire and catheter are passed to the narrowing, guided by X-ray and contrast dye.
• The narrowing is treated with balloon angioplasty, with or without a stent, atherectomy, or drug-coated balloon.
• After confirming a good result on imaging, the catheter is removed and pressure is applied to the puncture site, often supplemented by a small closure device.

The procedure usually takes one to two hours, depending on complexity.

After the procedure

• You lie flat for a few hours to allow the puncture to seal.
• Most patients go home the same day or the next morning.
• Walking is encouraged from the next day.
• Driving and heavy lifting are usually restricted for a few days.

Open Surgery vs Endovascular Treatment

Both approaches have a place. The choice depends on the location and length of the blockage, the quality of the arteries above and below it, the patient’s overall health and operative risk, prior procedures, and patient preference.

In general:

• Endovascular procedures tend to be preferred for shorter blockages, in older patients, in those with multiple medical conditions, and as a first attempt for most claudication that needs revascularisation. They offer shorter hospital stays, smaller wounds, and faster recovery, but may need repeat procedures.
• Open surgery tends to be preferred for long, complex disease, where endovascular treatment has failed, or where the anatomy demands a more durable repair. Bypass with vein conduit can give excellent long-term patency in the right patient.

Recovery and Aftercare

After an endovascular procedure

• Soreness at the puncture site for a few days is normal.
• Light activity can usually resume in two to three days.
• Most people return to ordinary routines within one to two weeks.
• Antiplatelet medications are continued, often with an additional medication for a defined period after stenting.

After bypass or endarterectomy

• Hospital stay is typically 3 to 7 days.
• Wound care, leg elevation, and gradual mobilisation are part of recovery.
• Full recovery commonly takes four to eight weeks.
• Walking is encouraged early. Heavy lifting and strenuous activity are restricted for several weeks.

Across both pathways

• Daily foot inspection becomes a permanent habit, especially in diabetes.
• Follow-up visits and ultrasound scans check that the treated artery remains open.
• All the risk factor control measures continue indefinitely — the procedure treats the blockage but not the underlying disease.

Lifestyle and Self-Management

Day-to-day choices have a large effect on how PAD behaves over time. The areas with the strongest evidence are:

Stopping smoking

This is the single most powerful change. Quitting slows disease progression, improves the success of any procedure, reduces the risk of heart attack and stroke, and lowers the risk of amputation. Support is widely available — counselling, nicotine replacement, and medications all improve quit rates compared with willpower alone.

Walking, every day

Even without a formal programme, a daily walking habit improves circulation by encouraging small blood vessels to develop alternative pathways around blockages. A practical pattern is to walk until pain reaches a moderate level, rest briefly, and walk again, building up to 30 to 45 minutes most days of the week.

Eating for vascular health

Diets rich in vegetables, fruit, whole grains, legumes, fish, nuts, and olive oil — broadly the Mediterranean pattern — have the strongest evidence for slowing atherosclerosis. Reducing salt, sugar, ultra-processed foods, and trans fats is also important. For South Asian patients, modest portion sizes of rice and roti, more dals and vegetables, and less deep-fried food are useful starting points.

Weight, blood pressure, and glucose

Working towards a healthy weight makes blood pressure and blood sugar easier to control, which in turn slows artery damage. Many patients find that home monitoring — a blood pressure cuff, a glucose meter where relevant — helps them stay on top of these numbers between clinic visits.

Foot care

Because PAD reduces the foot’s ability to heal, small problems can become serious. Daily habits include:

• Inspecting the feet for cuts, blisters, redness, or colour change
• Washing feet daily and drying carefully between the toes
• Wearing well-fitting, closed footwear and avoiding walking barefoot
• Keeping skin moisturised but avoiding moisture between the toes
• Getting professional help for nail care and corns rather than cutting deeply at home
• Seeing the doctor promptly for any wound that does not heal within a few days

Monitoring and Follow-up

PAD is a lifelong condition. Regular review allows your team to track disease activity, adjust medications, and intervene early if a stent or bypass shows signs of narrowing.

Typical elements of follow-up include:

• Clinical review with examination of pulses and feet, usually every 6 to 12 months for stable PAD
• Repeat ABI testing when symptoms change
• Duplex ultrasound surveillance after stenting or bypass — commonly at 1, 6, and 12 months and then yearly
• Periodic cholesterol, blood pressure, kidney function, and HbA1c checks
• Review of medication adherence and side effects

Bring a note of any change in walking distance, new foot symptoms, or new chest pain or stroke-like symptoms to each visit.

Risks and Complications

Of untreated PAD

• Worsening claudication and reduced quality of life
• Progression to rest pain
• Foot ulcers and infection
• Gangrene and risk of amputation
• Heart attack and stroke — statistically the leading causes of death in people with PAD

Of endovascular procedures

• Bruising or bleeding at the puncture site
• Pseudoaneurysm at the puncture site (a contained leak that may need ultrasound-guided treatment)
• Contrast-related kidney effects, especially in those with pre-existing kidney disease
• Allergic reaction to contrast dye
• Distal embolisation (a fragment of plaque dislodging downstream)
• Restenosis — the artery re-narrowing months or years later
• Stent fracture or thrombosis, uncommon

Of open surgery

• Wound infection
• Bleeding and need for transfusion
• Heart or lung complications during recovery
• Graft failure, either early or late
• Nerve injury near the surgical site, sometimes causing numbness

Most complications are manageable when caught early, which is part of why follow-up matters.

Living with PAD

For most people, living well with PAD means accepting it as a long-term partner that responds to attention. Many patients report that within a few months of starting a structured plan — quitting smoking, walking daily, taking their medications, and getting any needed procedure — their walking distance is noticeably better and their confidence returns.

It is also normal to feel frustrated, especially in the early months. Pain when walking can make people avoid activities they used to enjoy. Working with a vascular team that takes the time to set realistic, stepwise goals — walk to the end of the lane, then to the next corner, then to the shop and back — can rebuild momentum.

Mental health matters too. Smoking cessation is harder when life feels heavy, and depression and anxiety are more common in people with chronic vascular disease. Telling your doctor if mood is a problem opens the door to support that can make every other part of the plan easier.

Preventing Progression

Once PAD is diagnosed, the focus shifts from prevention of the disease to prevention of its progression and its consequences. The actions are largely the same as the lifestyle and medication measures already discussed, but a few points are worth restating:

• Stopping smoking — and staying stopped — matters more than any other single action.
• Taking statin and antiplatelet medications consistently, even when you feel well, is what reduces the risk of heart attack, stroke, and amputation over years.
• Regular walking maintains the gains.
• Foot care and prompt review of new wounds prevent small problems from becoming limb-threatening ones.
• Annual review with a vascular doctor or your primary care physician keeps the plan up to date.

When to Seek Urgent Care

Most PAD changes can wait for a scheduled review. Some cannot. Seek urgent or emergency care if you experience:

• A sudden, severe, cold, pale, painful leg or foot — this can mean an artery has become acutely blocked
• New numbness or weakness of the leg that comes on quickly
• A foot wound with spreading redness, pus, fever, or feeling generally unwell — possible infection
• A toe or part of the foot that has turned black
• Chest pain, breathlessness, or stroke-like symptoms (face droop, arm weakness, speech difficulty) — PAD and these events share the same underlying disease

Early action in these situations can save a limb or a life.

Frequently Asked Questions

Can PAD be cured?

PAD is a chronic condition rather than something that is permanently cured. However, it can be controlled very effectively. With good risk factor management, supervised exercise, and procedures when needed, most people see their symptoms improve substantially and their long-term risks drop.

If I have a stent or bypass, am I “fixed”?

A successful procedure restores blood flow at that segment, but the underlying atherosclerosis remains. Continuing medications, lifestyle measures, and follow-up is what keeps the treated artery open and protects the rest of the circulation. Stents and bypasses can narrow again over time, which is why surveillance scans matter.

How much walking is enough?

Current guidelines suggest aiming for 30 to 45 minutes of walking, three or more times a week. Walking until you reach moderate leg pain, resting, and then walking again is what stimulates the body to develop alternative blood flow pathways. Even shorter, more frequent walks are useful if longer sessions are not yet possible.

Is leg pain at rest always serious?

Rest pain in the foot or toes — particularly when lying down at night and relieved by hanging the leg over the side of the bed — is a sign of advanced PAD and should be assessed promptly. It is different from a passing leg cramp.

Will I need an amputation?

The large majority of people with PAD will never need an amputation. The risk rises with smoking, poorly controlled diabetes, advanced disease at diagnosis, and delays in treating foot wounds. Active management of risk factors and prompt treatment of any foot problem are what prevent this outcome in most cases.

Can I travel by air with PAD?

For stable PAD, flying is generally safe. Long flights raise the risk of blood clots in everyone; people with PAD benefit from staying well hydrated, moving around the cabin regularly, and discussing graduated compression stockings with their doctor. After a recent procedure or surgery, ask your vascular team when air travel is appropriate.

Is PAD the same as varicose veins or DVT?

No. PAD affects arteries that carry blood away from the heart. Varicose veins and deep vein thrombosis (DVT) affect veins that return blood to the heart. They can coexist but are different conditions with different treatments.

Should family members be screened?

There is no formal screening programme for PAD in most countries, but family members with diabetes, high blood pressure, high cholesterol, or a smoking history should discuss their cardiovascular risk with their doctor. Simple measures — checking blood pressure, cholesterol, and feeling the foot pulses on examination — can identify those who would benefit from further testing.

Conclusion

Peripheral artery disease is best understood as a long-term condition that responds well to a coordinated plan. The pillars are clear and consistent across major vascular guidelines: stop smoking, walk regularly, control cholesterol, blood pressure and diabetes, take protective medications, look after the feet, and use procedures — angioplasty, stenting, or bypass — when they are needed to relieve symptoms or save a limb.

Most people who follow this approach see meaningful improvements in walking distance, comfort, and confidence, and significantly reduce their long-term risk of heart attack, stroke, and amputation. The road is a long one, but it is well-mapped, and a good vascular team can help tailor it to your particular pattern of disease, your other health conditions, and the life you want to lead.