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Unstable angina and elevated c-reactive protein levels predict enhanced vasoreactivity of the culprit lesion

F Tomai1, F Crea, A Gaspardone

  • 1Cattedra di Cardiochirurgia, Università di Roma Tor Vergata, Rome, Italy. f.tomai@tiscalinet.it

Circulation
|September 26, 2001
PubMed

Insights

Inflammation, indicated by C-reactive protein (CRP) levels, enhances coronary artery reactivity in patients with unstable angina. This suggests inflammatory mechanisms play a key role in modulating atherosclerotic plaque reactivity.

Area of Science:

  • Cardiology
  • Vascular Biology
  • Inflammation Research

Background:

  • Plaque inflammation may influence coronary vasomotion.
  • Systemic C-reactive protein (CRP) levels are investigated for their association with coronary vasoreactivity.

Purpose of the Study:

  • To assess the relationship between systemic CRP levels and coronary vasoreactivity in patients with stable or unstable angina.
  • To determine if inflammation modulates coronary atherosclerotic plaque reactivity.

Main Methods:

  • Quantitative coronary angiography was used to measure minimal luminal diameter (MLD) changes.
  • Patients underwent a cold pressor test (CPT) and nitroglycerin (NTG) administration.
  • Serum CRP levels were measured and categorized as normal or elevated.

Main Results:

  • Unstable angina patients showed greater MLD reduction during CPT and increase after NTG compared to stable angina patients.
  • Elevated CRP levels correlated with greater MLD reduction during CPT and increase after NTG.
  • Multivariate analysis identified unstable angina and elevated CRP as independent predictors of enhanced vasoreactivity.

Conclusions:

  • Enhanced vasoreactivity of the culprit lesion is confirmed in unstable angina patients.
  • Inflammatory mechanisms, evidenced by CRP, significantly modulate coronary atherosclerotic plaque reactivity.
  • Inflammation may partially explain the enhanced vasoreactivity observed in unstable plaques.
Abstract

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