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Intravascular Ultrasound Image-Based Finite Element Modeling Approach for Quantifying In Vivo Mechanical Properties of Human Coronary Artery
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Relation between individual plaque components and overall plaque burden in the prospective, multicenter virtual

Jie Qian1, Akiko Maehara, Gary S Mintz

  • 1Cardiovascular Research Foundation and Columbia University Medical Center, New York, New York, USA.

The American Journal of Cardiology
|August 8, 2009
PubMed

Insights

The absolute amount of each virtual histologic intravascular ultrasound plaque component, not the relative amount, correlates with total plaque burden. This finding is crucial for accurately analyzing plaque composition in cardiovascular disease research.

Area of Science:

  • Cardiovascular Imaging
  • Interventional Cardiology
  • Biomedical Engineering

Background:

  • The relationship between total plaque burden and the composition of atherosclerotic plaque components (fibrous tissue, fibrofatty plaque, dense calcium, necrotic core) is not fully understood.
  • Virtual Histologic Intravascular Ultrasound (VH-IVUS) provides detailed plaque characterization, but its interpretation in the context of overall plaque burden requires further investigation.

Purpose of the Study:

  • To investigate the impact of total plaque burden on the absolute and relative amounts of individual VH-IVUS plaque components.
  • To determine how changes in plaque components relate to overall plaque size in a large patient cohort.

Main Methods:

  • Analysis of grayscale and VH-IVUS data from 990 patients in the global VH-IVUS registry.
  • Linear regression modeling to assess correlations between total plaque burden and absolute/relative cross-sectional areas of fibrous tissue, fibrofatty plaque, dense calcium, and necrotic core.
  • Subgroup analyses based on gender, age, and acute coronary syndromes.

Main Results:

  • Absolute cross-sectional areas of all four plaque components (fibrous tissue, fibrofatty plaque, dense calcium, necrotic core) correlated with total plaque cross-sectional area.
  • Fibrous tissue showed a stronger correlation with total plaque area compared to other components.
  • Increases in plaque area were primarily driven by fibrous tissue (50%), followed by gradual increases in other components.
  • No significant correlation was found between the *relative* amounts of plaque components and total plaque cross-sectional area.

Conclusions:

  • Only the absolute area of each plaque component, not its relative proportion, is significantly correlated with overall plaque area.
  • VH-IVUS plaque component analysis must account for variations in total plaque mass to ensure accurate interpretation.
  • These findings have implications for understanding atherosclerosis progression and guiding treatment strategies.

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