Peripheral Arterial Disease: What It Is and How It Is Treated

Written by Medicover Team and Medically Reviewed by Dr Jagadeesh Chandra Bose Y , Cardiologists

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Peripheral arterial disease is a condition in which arteries outside the heart and brain become narrowed or blocked, reducing blood flow to the limbs. Although the legs are most commonly affected, PAD can also involve the arteries supplying the arms and other parts of the body.

The most common cause is atherosclerosis. Reduced circulation can cause muscle pain during activity and, in advanced disease, pain at rest, ulcers, tissue damage, or gangrene. PAD is also a marker of a higher risk of heart attack and stroke because the underlying arterial disease may affect blood vessels throughout the body.

What Are the Types of Peripheral Arterial Disease?

Peripheral arterial disease can be described according to its underlying cause, location, and severity. Most cases are caused by atherosclerosis, while less common forms result from other vascular conditions.

Atherosclerotic PAD: The most common form, caused by plaque buildup that narrows or blocks arteries supplying the limbs.
Thromboangiitis obliterans (Buerger disease): A rare inflammatory condition strongly associated with tobacco use that affects small and medium-sized blood vessels, usually in the hands and feet.
Acute limb ischemia: A sudden reduction or loss of blood flow to a limb, commonly caused by a blood clot or an embolus. This is a medical emergency.
Chronic limb-threatening ischemia: Advanced PAD in which severely reduced blood flow causes persistent pain at rest, non-healing wounds, or tissue loss.

PAD can also affect different arterial locations, including the arteries of the pelvis, thighs, lower legs, and arms.

What Are the Symptoms of Peripheral Arterial Disease?

Some people with PAD have no symptoms, particularly in the early stages. When symptoms occur, they are usually related to reduced blood flow to the legs and feet.

Leg pain during walking: Cramping, aching, or heaviness in the calf, thigh, or buttock that develops with activity and improves after resting is a common symptom.
Numbness or weakness: Reduced circulation may cause numbness, weakness, or a heavy feeling in the legs or feet.
Cold feet or legs: One foot or leg may feel noticeably colder than the other because of reduced blood flow.
Skin color changes: The skin may appear pale, bluish, or otherwise different in color compared with the unaffected limb.
Slow-healing wounds: Cuts, sores, or ulcers on the feet and legs may take longer than usual to heal.
Hair and nail changes: Reduced circulation may cause decreased hair growth on the legs and slower toenail growth.
Pain at rest: Advanced PAD can cause persistent foot or leg pain, particularly at night or when lying down.
Erectile dysfunction: Reduced blood flow can contribute to erectile dysfunction in some men.

Sudden severe pain, marked paleness or coldness of a limb, sudden numbness or weakness, or loss of a pulse may indicate an acute arterial blockage and requires emergency medical attention.

What Are the Causes of Peripheral Arterial Disease?

The most common cause of PAD is atherosclerosis, which occurs when cholesterol, fats, and other substances accumulate inside the arterial walls and form plaques. These plaques narrow the arteries and restrict blood flow.

Atherosclerosis: Plaque buildup inside the arteries is the leading cause of peripheral arterial disease.
Smoking: Tobacco use damages blood vessels, accelerates atherosclerosis, and significantly increases the risk of PAD.
Diabetes: High blood sugar can damage blood vessels and increase the risk of plaque formation and peripheral artery disease.
High blood pressure: Persistent hypertension can damage artery walls and promote atherosclerosis.
High cholesterol: Elevated levels of LDL cholesterol can contribute to plaque buildup and arterial narrowing.
Blood clots: A clot can sometimes block an artery and cause an acute reduction in blood flow.
Blood vessel inflammation or injury: Certain inflammatory or vascular conditions can damage arteries and impair circulation.

When Should You See a Doctor for Peripheral Arterial Disease?

Consult a cardiologist or healthcare provider if you develop symptoms that may indicate reduced blood flow to the legs or feet, particularly if you have risk factors such as smoking, diabetes, high blood pressure, or high cholesterol.

Leg pain or cramping while walking that improves with rest
Numbness, weakness, or persistent coldness in the feet or legs
Changes in skin color or reduced hair growth on the legs
Slow-healing sores or ulcers on the feet or legs
Persistent foot or leg pain, especially at rest

Get medical help immediately if:

Sudden severe pain develops in a leg or foot
A limb suddenly becomes pale, blue, cold, numb, or weak
You suddenly lose movement or sensation in an affected limb
A wound develops rapidly worsening pain, discoloration, or signs of severe infection

These symptoms may indicate acute limb ischemia or another serious vascular complication requiring urgent treatment.

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How Is Peripheral Arterial Disease Diagnosed?

Diagnosing PAD involves reviewing symptoms and cardiovascular risk factors, examining the limbs, and assessing arterial blood flow. Early diagnosis is important because PAD can indicate widespread atherosclerotic disease and an increased risk of cardiovascular complications.

Physical Examination

The healthcare provider may examine the legs and feet for changes in skin color, temperature, wounds, hair growth, and muscle condition. Pulses in the legs and feet may also be checked for reduced or absent blood flow.

Ankle-Brachial Index

The ankle-brachial index (ABI) is a common, non-invasive test that compares blood pressure at the ankle with blood pressure in the arm. A reduced ankle pressure can indicate impaired blood flow to the legs.

Duplex Ultrasound

Doppler or duplex ultrasound uses sound waves to evaluate blood flow through the arteries and can help identify areas of narrowing or blockage.

CT Angiography and MR Angiography

CT angiography (CTA) and magnetic resonance angiography (MRA) can provide detailed images of blood vessels and help identify the location and extent of arterial narrowing or blockage, particularly when an intervention is being considered.

Catheter Angiography

Catheter-based angiography may be performed when detailed visualization of the arteries is required, particularly when a procedure to restore blood flow is planned.

What Are the Treatment Options for Peripheral Arterial Disease?

Treatment for PAD aims to improve symptoms, increase walking ability, reduce the risk of heart attack and stroke, and prevent complications such as ulcers, tissue loss, and limb loss. The treatment approach depends on the severity of disease and the individual's overall health.

Lifestyle Changes

Smoking cessation: Stopping tobacco use is one of the most important steps for slowing disease progression and reducing cardiovascular risk.
Regular physical activity: A structured walking or supervised exercise program can improve walking ability and symptoms in many people with PAD.
Healthy diet: A balanced diet low in saturated and trans fats and rich in vegetables, fruits, whole grains, and other nutrient-dense foods supports cardiovascular health.
Weight management: Maintaining a healthy weight can help control cardiovascular risk factors.
Diabetes management: Maintaining blood glucose within the recommended range helps reduce vascular and foot-related complications.
Blood pressure and cholesterol control: Managing these risk factors can slow atherosclerosis and reduce cardiovascular risk.

Medications

Antiplatelet medicines: Medicines such as aspirin or clopidogrel may be prescribed to reduce the risk of cardiovascular events in appropriate patients.
Statins: Cholesterol-lowering medicines help reduce LDL cholesterol and cardiovascular risk.
Blood pressure medicines: Antihypertensive treatment may be used when high blood pressure is present.
Diabetes medicines: Appropriate glucose-lowering treatment may be required to control diabetes and reduce vascular complications.
Cilostazol: May improve walking distance in selected patients with intermittent claudication, but it is not suitable for people with certain forms of heart failure.

Angioplasty and Stenting

For selected patients with significant symptoms or severe arterial narrowing, an endovascular procedure such as angioplasty may be used to widen a narrowed artery. A stent may be placed in some cases to help maintain blood flow.

Bypass Surgery

When arterial blockages are extensive or cannot be adequately treated with endovascular procedures, bypass surgery may be considered. The procedure creates an alternative pathway for blood to flow around the blocked section of an artery.

Treatment of Foot Wounds

People with advanced PAD or diabetes may require specialized care for foot ulcers, infections, or tissue damage. Severe cases may require revascularization and, when tissue is no longer viable, surgical removal of damaged tissue.

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What Are the Risk Factors for Peripheral Arterial Disease?

Several factors increase the likelihood of developing PAD. Some can be modified through lifestyle changes and medical treatment, while others, such as age and family history, cannot be changed.

Smoking and tobacco use: Tobacco exposure is one of the strongest modifiable risk factors for PAD.
Diabetes: Diabetes increases the risk of arterial disease and complications involving the feet.
High blood pressure: Long-term hypertension can damage arteries and accelerate plaque formation.
High cholesterol: High LDL cholesterol contributes to atherosclerosis.
Older age: The risk of PAD increases with age, particularly after 65 years.
Family history: A family history of PAD, heart disease, or stroke may increase susceptibility.
Obesity: Excess body weight is associated with several cardiovascular risk factors that can contribute to PAD.
Physical inactivity: A sedentary lifestyle is associated with a higher risk of cardiovascular disease and PAD.
Kidney disease: Chronic kidney disease is associated with an increased risk of peripheral arterial disease.

What Are the Complications of Peripheral Arterial Disease?

Without appropriate management, PAD can progressively reduce blood flow and lead to serious complications. It is also associated with an increased risk of cardiovascular disease.

Chronic limb-threatening ischemia: Severe reduction in blood flow can cause persistent pain, ulcers, and tissue loss.
Non-healing wounds: Poor circulation can prevent cuts and ulcers on the feet or legs from healing normally.
Infection: Poor blood supply can make wounds more difficult to heal and increase the risk of serious infection.
Gangrene: Severe loss of blood flow can cause tissue death and may require surgical treatment or amputation.
Acute limb ischemia: A sudden arterial blockage can threaten the viability of a limb and requires emergency treatment.
Heart attack and stroke: PAD reflects systemic atherosclerosis and is associated with an increased risk of cardiovascular and cerebrovascular events.

How Can Peripheral Arterial Disease Be Prevented?

Not all cases of PAD can be prevented, but controlling cardiovascular risk factors can significantly reduce the likelihood of developing or worsening the disease.

Do not smoke or use tobacco products.
Exercise regularly and maintain an active lifestyle.
Follow a heart-healthy, balanced diet.
Maintain healthy cholesterol and blood pressure levels.
Control diabetes and monitor blood glucose as advised.
Maintain a healthy body weight.
Attend regular medical check-ups when you have cardiovascular risk factors.
Inspect the feet regularly, especially if you have diabetes or reduced circulation.

What Is the Outlook for People With Peripheral Arterial Disease?

The outlook for PAD depends on the severity of arterial disease, the presence of other health conditions, and how effectively risk factors are controlled. Many people can improve their walking ability and reduce symptoms through exercise, lifestyle changes, medications, and appropriate vascular treatment.

Because PAD is associated with a higher risk of heart attack and stroke, long-term management should address overall cardiovascular health rather than focusing only on leg symptoms. Regular follow-up helps monitor circulation, treatment response, and the development of complications.

Frequently Asked Questions

1. How do I recognize the signs of peripheral arterial disease?

Look for leg pain, cramping, numbness, or weakness during exercise that improves with rest. Also note slow-healing wounds on legs or feet.

2. What lifestyle changes should I make to manage peripheral arterial disease effectively?

Quit smoking, maintain a healthy weight, follow a heart-healthy diet, exercise regularly, control blood pressure and cholesterol levels.

3. How can peripheral arterial disease affect the body in the long term?

Peripheral arterial disease can lead to reduced blood flow to limbs, causing pain, slow wound healing, tissue damage, and in severe cases, amputation.

4. What steps should I take for the management of peripheral arterial disease?

Manage PAD with lifestyle changes like quitting smoking, regular exercise, healthy diet. Medications or surgery may be needed in severe cases.

5. Can peripheral arterial disease return even after successful treatment?

Yes, peripheral arterial disease can return even after successful treatment due to underlying risk factors like smoking, high cholesterol, and diabetes.