What is Peripheral Artery Disease (PAD)?

Peripheral artery disease is similar to coronary artery disease (CAD).

Peripheral artery disease is a narrowing of the peripheral arteries that carry blood away from the heart to other parts of the body. The most common type is lower-extremity PAD, in which blood flow is reduced to the legs and feet. Upper-extremity PAD (arms, hands and fingers) is less common but affects about 10% of the population.

Both PAD and coronary artery disease are caused by atherosclerosis, the buildup of fatty plaque in the arteries that narrows and blocks them throughout the body, including in the heart, brain, arms, legs, pelvis and kidneys. 

Quick facts about PAD

The most common symptoms of lower-extremity PAD are cramping, fatigue, aching, pain or discomfort in the leg or hip muscles while walking or climbing stairs. This pain usually goes away with rest and returns when you walk again. 

Be aware that:

• Many people mistake the symptoms of PAD for something else.
• PAD often goes undiagnosed by health care professionals.
• People with peripheral artery disease have a higher risk of coronary artery disease, heart attack and stroke.
• Left untreated, PAD can lead to gangrene and amputation.

View our interactive PAD library.

Added risks for PAD

Certain factors increase your chances for peripheral artery disease, including:

• Older age.
• High blood pressure or high cholesterol
• Smoking
• Type 2 diabetes     

The good news

If you’re at risk for peripheral artery disease or have been diagnosed with PAD:

• PAD is diagnosed in a simple, painless way.
• You can take control: Follow your doctor’s recommendations and strive to lead a heart-healthy lifestyle.
• Some cases of PAD can be managed with lifestyle changes and medication.

Atherosclerosis and PAD

If you have atherosclerosis, that means that plaque has built up inside your artery walls. Plaque is made up of deposits of fats, cholesterol and other substances. Atherosclerosis in the peripheral arteries is the most common cause of PAD.

To see how plaque limits blood flow, view our interactive PAD library.

First, plaque builds up enough to narrow an artery, which reduces blood flow. Next, if that plaque becomes brittle or inflamed, it may rupture, causing a blood clot to form. A clot can further narrow the artery or completely block it.

If the blockage remains in the peripheral arteries of the legs, it can cause pain, changes in skin color, difficulty walking and sores or ulcers. Total loss of circulation to the legs and feet can cause gangrene and the loss of a limb.

If the blockage occurs in a carotid artery, it can cause a stroke.

Watch an atherosclerosis and PAD animation

It’s important to learn the facts about PAD. The more you understand, the more you can help your doctor make an early diagnosis. PAD has common symptoms, but many people with PAD never have any symptoms.

Talk to your doctor and take control of your cardiovascular health.