EpistemisIschemic pain at rest in the lower extremities
Specialty: Cardiovascular.
Why it occurs
- Advanced obliterative peripheral arteriopathy (Leriche-Fontaine Stage III or IV)
- Acute arterial thrombosis in situ on atherosclerotic plaque
- Acute arterial embolism of the extremity (cardiac or aortic origin)
- Thromboangitis obliterans (Buerger's disease)
- Critical ischemia associated with diabetic nephropathy or calciphylaxis
Initial workup
Determination of the Ankle-Brachial Index (ABI), which typically shows values less than 0.40 in critical rest ischemia; Arterial Doppler ultrasound of the lower extremities to localize the level and extent of arterial occlusions; Computed tomography angiography (CT-Angio) of the lower limbs or percutaneous digital subtraction arteriography (gold standard for surgical or endovascular planning); General analysis with lipid profile, kidney function, blood glucose and inflammatory markers.
red flags
Intolerable and continuous pain in the foot or toes (typically exacerbated by recumbency and relieved by hanging the leg from the edge of the bed) accompanied by extreme unilateral coldness of the foot, cadaverous pallor progressing to cyanosis or purplish discoloration, paresthesias, paralysis or motor weakness of the foot (absence of dorsiflexion), complete loss of distal pulses (pedio and tibialis posterior) or presence of painful ischemic ulcers or digital gangrene. It constitutes a condition of critical ischemia of the extremity with imminent risk of amputation or sepsis, requiring emergency revascularization.
Standard management
- Cilostazol — phosphodiesterase III inhibitor with peripheral vasodilator and antiplatelet effect, indicated in chronic peripheral arterial disease; 100 mg twice daily orally, contraindicated in heart failure of any degree
- Acetylsalicylic acid — antiplatelet agent indicated to reduce the risk of major cardiovascular events; 100 mg once a day orally
- Clopidogrel — alternative or complementary antiplatelet agent; 75 mg once daily orally
- Enoxaparin — low molecular weight heparin indicated immediately in cases of suspected acute embolic or thrombotic arterial ischemia; 1 mg/kg every 12 hours subcutaneously
- Atorvastatin (high-potency statin for the stabilization of atherosclerotic plaques and reduction of vascular risk; 40 to 80 mg once daily orally).
Educational guidance for study. It is NOT a prescription recommendation. The actual choice depends on the cause, the patient, and current guidelines.
- Area
- Cardiovascular
- Listed causes
- 5
- Treatment options
- 5