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Carotid and femoral atherosclerotic plaques show different morphology

Fanny Herisson1, Marie-Françoise Heymann, Maud Chétiveaux

  • 1INSERM, U957, Nantes F-44000, France.

Atherosclerosis
|March 4, 2011
PubMed

Insights

Carotid and femoral artery plaques exhibit distinct histological and biochemical characteristics. Femoral plaques are more often fibrocalcific with osteoid metaplasia, while carotid plaques are typically fibrous cap atheromas.

Area of Science:

  • Vascular Biology
  • Atherosclerosis Research
  • Comparative Pathology

Background:

  • Endovascular repair outcomes differ across arterial beds.
  • Plaque characteristics may explain these outcome variations.
  • A comparative study of carotid and femoral atheroma was warranted.

Purpose of the Study:

  • To investigate differences in plaque features between carotid and femoral arteries.
  • To test the hypothesis that arterial bed-specific plaque morphology influences endovascular repair results.
  • To compare histological and biochemical profiles of carotid and femoral atheroma.

Main Methods:

  • Prospective study design comparing carotid and femoral atheroma.
  • Collection of demographic data and blood samples pre-surgery.
  • Histological (AHA grading, calcification, lipid content) and biochemical analysis of harvested plaques.

Main Results:

  • Eighty-eight plaques analyzed (45 carotid, 43 femoral) with no demographic or biological differences.
  • Carotid arteries predominantly showed fibrous cap atheroma (75%), while femoral arteries showed fibrocalcific plaques (93%).
  • Femoral plaques had higher prevalence of osteoid metaplasia (63% vs 20%), increased calcium, and lower cholesterol content compared to carotid plaques.

Conclusions:

  • Carotid and femoral artery plaques demonstrate significantly different morphologies.
  • Histological and biochemical differences suggest distinct pathobiology between carotid and femoral atheroma.
  • These findings may inform tailored endovascular repair strategies for different arterial locations.
Abstract

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