Differences in intravascular ultrasound and histological findings in culprit coronary plaques between ST-segment

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Intravascular Ultrasound Image-Based Finite Element Modeling Approach for Quantifying In Vivo Mechanical Properties of Human Coronary Artery
06:18

Intravascular Ultrasound Image-Based Finite Element Modeling Approach for Quantifying In Vivo Mechanical Properties of Human Coronary Artery

Published on: December 6, 2024

Cheol Whan Lee1, Ilseon Hwang, Chan-Sik Park

  • 1Department of Medicine, University of Ulsan, Seoul, Korea.

Journal of Thrombosis and Thrombolysis
|September 6, 2013
PubMed

Insights

Vulnerable plaques causing ST-segment elevation myocardial infarction (STEMI) exhibit greater plaque burden, inflammation, and thrombi. Intravascular ultrasound and histology revealed these differences compared to stable angina, confirming vulnerable plaque characteristics.

Area of Science:

  • Cardiovascular Medicine
  • Interventional Cardiology
  • Pathology

Background:

  • Understanding vulnerable plaques is crucial for managing ST-segment elevation myocardial infarction (STEMI).
  • Culprit coronary lesions are key to identifying plaques responsible for STEMI.
  • Comparing plaque characteristics in STEMI versus stable angina can elucidate STEMI mechanisms.

Purpose of the Study:

  • To compare intravascular ultrasound (IVUS) and histological findings in culprit coronary plaques.
  • To identify differences between plaques from STEMI patients and those with stable angina.

Main Methods:

  • IVUS and histological analysis of culprit coronary plaques from 94 patients (54 STEMI, 40 stable angina).
  • Tissue specimens obtained via directional coronary atherectomy prior to percutaneous coronary intervention.
  • Comparison of plaque characteristics, inflammation markers (CD68, CD31), and smooth muscle actin.

Main Results:

  • STEMI group showed more frequent plaque rupture and thrombi.
  • Minimal lumen area site in STEMI had greater vessel area, remodeling index, plaque burden, and smaller lumen area.
  • Increased CD68 and CD31 immunopositivity in STEMI group; increased α-smooth muscle actin in stable angina group.

Conclusions:

  • Culprit lesions in STEMI patients demonstrate higher plaque burden, remodeling index, and thrombi.
  • Increased inflammation and neovascularization are characteristic of STEMI culprit lesions.
  • Findings support the concept of vulnerable plaques driving STEMI.

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