Skip to Main Content

INTRODUCTION

Occlusive or inflammatory disease that develops within the peripheral arteries, veins, or lymphatics. Pathologic contributors include atherosclerosis, thromboembolism, vasculitis, and fibromuscular dysplasia.

ARTERIOSCLEROSIS OF PERIPHERAL ARTERIES

HISTORY

Most common symptom is intermittent claudication, a muscular aching or cramping with exercise, quickly relieved by rest. Pain in buttocks and thighs suggests aortoiliac disease; calf muscle pain implies femoral or popliteal artery disease. More advanced arteriosclerotic obstruction results in pain at rest; painful ulcers of the feet (sometimes painless in diabetics) may result.

PHYSICAL EXAMINATION

Decreased peripheral pulses (ankle:brachial index usually <0.90; <0.5 indicates severe ischemia), blanching of affected limb with elevation, dependent rubor (redness). Ischemic ulcers or gangrene of toes may be present.

LABORATORY

Segmental pressure measurements and Doppler ultrasound of peripheral pulses before and immediately after exercise localizes stenoses; magnetic resonance angiography, computed tomographic angiography (CTA), or conventional arteriography is performed if mechanical revascularization (surgical or percutaneous) is planned.

TREATMENT

TREATMENT Arteriosclerosis

Most pts can be managed medically with daily exercise program, careful foot care (especially in diabetics), treatment of hypercholesterolemia, and local debridement of ulcerations. Abstinence from cigarettes is mandatory. Antiplatelet and statin therapies are indicated to reduce future cardiovascular events. Some, but not all, pts note symptomatic improvement with drug therapy (cilostazol or pentoxifylline). Pts with severe claudication, rest pain, or gangrene are candidates for revascularization (arterial reconstructive surgery or percutaneous transluminal angioplasty/stent placement).

OTHER CONDITIONS THAT IMPAIR PERIPHERAL ARTERIAL FLOW

ARTERIAL EMBOLISM

Most common sources are thrombus or vegetation in the heart or aorta, or paradoxically from a venous thrombus through a right-to-left intracardiac shunt.

HISTORY

Sudden pain or numbness in an extremity in the absence of previous history of claudication.

PHYSICAL EXAMINATION

Absent pulse, pallor, and decreased temperature of limb distal to the occlusion. Diagnosis confirmed by CT, MR, or conventional angiography.

TREATMENT

TREATMENT Arterial Embolism

IV heparin is administered to prevent propagation of clot. For acute severe ischemia, immediate endovascular or surgical embolectomy is indicated. Thrombolytic therapy (e.g., tissue plasminogen activator, reteplase, or tenecteplase) may be effective for recent (<2 weeks) thrombus within atherosclerotic vessel or arterial bypass graft.

ATHEROEMBOLISM

A subset of acute arterial occlusion due to embolization of fibrin, platelets, and cholesterol debris from more proximal atheromas or aneurysm; typically occurs after intraarterial instrumentation. Depending on location, may lead to stroke, renal insufficiency, or pain and tenderness in embolized tissue. Atheroembolism to lower extremities results in blue toe syndrome, which can progress to necrosis and gangrene. Treatment is supportive; for recurrent ...

Pop-up div Successfully Displayed

This div only appears when the trigger link is hovered over. Otherwise it is hidden from view.