Alternative Names: PVD, Peripheral Artery Disease, Peripheral Arterial Disease, PAD, Leg Artery Disease
Peripheral vascular disease (PVD) refers to diseases of the arteries and veins that are located outside the heart and brain. It is a common circulatory problem in which narrowed arteries reduce blood flow to the limbs.
When PVD develops, the body's extremities (usually the legs) receive insufficient blood to satisfy their needs, causing symptoms such as leg pain when walking.
Incidence; Causes and Development; Contributing Risk Factors
About 5% of people over the age of 50 are believed to suffer from peripheral artery
disease. Peripheral artery disease is slightly more common in men than in women.
Peripheral artery disease is often caused by atherosclerosis. Although we usually think of the heart when discussing atherosclerosis, it can and usually does affect other arteries in the body as well; when it occurs in the arteries supplying blood to the limbs, it causes peripheral vascular disease.
A number of conditions such as vasculitis may cause damage to blood vessels throughout the body. Injuries to blood vessels (such as those occurring in a car accident or sports injury), blood-clotting disorders, and damage to blood vessels during surgery can also lead to tissue ischemia.
Other less common causes include blood vessel inflammation, injury to the limbs, unusual muscle or ligament anatomy, or radiation exposure.
Risk factors for peripheral vascular disease are similar to those for atherosclerosis and include:
The risk factors are additive, meaning that a person with a combination of two risk factors – diabetes and smoking, for example – has an increased likelihood of developing more severe peripheral artery
disease than a person with only one risk factor.
Signs and Symptoms
Approximately half of people with PVD do not experience any symptoms, but for those with symptoms the most common is leg pain when walking (intermittent claudication
). Symptoms of PVD depend upon the location and extent of the blocked arteries
- Painful cramping in the hip, thigh or calf muscles after activity such as walking or climbing stairs (Intermittent claudication)
- Leg numbness or weakness of the calf muscle
- Atrophy of the calf muscle
- Coldness in the lower leg or foot, especially when compared with the other side
- Sores on the toes, feet or legs that won't heal
- A change in the color of the legs
- Feet turn pale when elevated, and dark red when lowered
- Hair loss or slower hair growth on the feet and legs
- Slower growth and/or thickening of the toenails
- Shiny skin on your legs
- No pulse or a weak pulse in your legs or feet
- Erectile dysfunction in men
- (In critical cases) Rest pain, which occurs when the artery occlusion is so severe that there is not enough blood and oxygen supply to the lower extremities even at rest. The pain typically affects the feet, is usually severe, and occurs at night when lying down.
As peripheral artery disease progresses, pain may occur even when at rest or when lying down, and it may be severe enough to disrupt sleep.
Diagnosis and Tests
Signs of peripheral vascular
disease include weak or absent pulse in the extremities; sounds (bruits) that can be heard with a stethoscope; blood pressure changes in the limbs between rest and exercise (the treadmill test); skin color and nail changes due to tissue ischemia
Radiologic imaging techniques including Doppler ultrasound, Duplex ultrasound, and MRI angiography are used to help diagnose peripheral vascular disease.
Treatment and Prevention
Treatment goals include pain relief, improving exercise tolerance, and preventing critical artery
occlusion, heart attacks and strokes.
Peripheral vascular disease can be successfully treated by lifestyle alterations, medications, angioplasty and related treatments, or surgery. Lifestyle alterations also help prevent PVD and include quitting tobacco, exercising and eating a healthy diet.
Smoking cessation eliminates a major risk factor for disease progression and lowers the incidences of rest pain and need for amputations. It also helps prevent heart attacks and strokes.
Properly supervised exercise can condition the muscles to use oxygen more effectively and improve circulation.
Medications may be required and include:
- Cholesterol-lowering drugs such as statins
- Medications such as cilostazol (Pletal) and pentoxifylline (Trental) which increase blood supply to the extremities
- Medications to control high blood pressure
- Antiplatelet medications such as aspirin and clopidogrel (Plavix) to reduce blood clotting
- Anticoagulant medications prevent blood clotting for those at risk. Examples are heparin and warfarin (Coumadin)
Other risk factors, such as diabetes
, poor lipid
levels, and high blood pressure should be reduced as far as is possible.
When experiencing pain while lying down, hanging your legs over the edge of your bed or walking around your room may temporarily relieve the pain.
Angioplasty is a nonsurgical procedure that can widen a narrowed or blocked arteries. In more difficult cases, surgical techniques such as bypass surgery (creating detours around a blocked artery) or endarterectomy (cleaning out plaque buildup inside an artery) can be used.
Seek medical attention if...
If you have leg pain, numbness or other symptoms, don't dismiss them as a normal part of aging – see your doctor.