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Critical limb ischemia: definition and natural history

S Novo1, G Coppola, G Milio

  • 1Chair of Cardiovascular Disease, University of Palermo, Italy. novosav@unipa.it

Current Drug Targets. Cardiovascular & Haematological Disorders
|September 24, 2004
PubMed

Insights

Critical limb ischemia (CLI) is a serious condition causing leg pain, ulcers, or gangrene due to blocked arteries. CLI significantly increases the risk of heart attack, stroke, and death, highlighting its public health importance.

Area of Science:

  • Vascular Medicine
  • Public Health

Background:

  • Critical limb ischemia (CLI) is defined by chronic ischemic rest pain, ulcers, or gangrene in the legs due to arterial occlusive disease.
  • CLI is distinct from acute limb ischemia and affects 500-1000 individuals per million annually, particularly older adults, smokers, and diabetics.

Purpose of the Study:

  • To highlight the severity and public health implications of critical limb ischemia.
  • To differentiate CLI from acute limb ischemia and discuss its incidence and risk factors.

Main Methods:

  • Literature review and synthesis of epidemiological data on critical limb ischemia.
  • Analysis of amputation rates and revascularization outcomes in CLI patients.
  • Comparison of CLI prognosis with intermittent claudication regarding cardiovascular events.

Main Results:

  • Amputation rates for CLI range from 10% to 40%, often reserved for cases with no graftable vessels or severe patient impairment.
  • Highly specialized centers report up to 90% revascularization attempts in CLI patients.
  • Patients with CLI face a 3-fold higher risk of myocardial infarction, stroke, and vascular death compared to those with intermittent claudication.

Conclusions:

  • Critical limb ischemia poses a significant threat to limb salvage and patient survival, negatively impacting quality of life.
  • The elevated risk of systemic vascular events underscores CLI as a critical public health issue requiring urgent attention.
  • Effective revascularization strategies and risk factor management are crucial for improving outcomes in CLI patients.

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