Quantification of patient-specific coronary material properties and their correlations with plaque morphological characteristics: An in vivo IVUS study

Liang Wang, Akiko Maehara, Xiaoguo Zhang, Rui Lv, Yangyang Qu, Xiaoya Guo, Jian Zhu, Zheyang Wu, Kristen L. Billiar, Jie Zheng, Lijuan Chen, Genshan Ma, Gary S. Mintz, Dalin Tang

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Background: A method using in vivo Cine IVUS and VH-IVUS data has been proposed to quantify material properties of coronary plaques. However, correlations between plaque morphological characteristics and mechanical properties have not been studied in vivo. Method: In vivo Cine IVUS and VH-IVUS data were acquired at 32 plaque cross-sections from 19 patients. Six morphological factors were extracted for each plaque. These samples were categorized into healthy vessel, fibrous plaque, lipid-rich plaque and calcified plaque for comparisons. Three-dimensional thin-slice models were constructed using VH-IVUS data to quantify in vivo plaque material properties following a finite element updating approach by matching Cine IVUS data. Effective Young's moduli were calculated to represent plaque stiffness for easy comparison. Spearman's rank correlation analysis was performed to identify correlations between plaque stiffness and morphological factor. Kruskal-Wallis test with Bonferroni correction was used to determine whether significant differences in plaque stiffness exist among four plaque groups. Result: Our results show that lumen circumference change has a significantly negative correlation with plaque stiffness (r = −0.7807, p = 0.0001). Plaque burden and calcification percent also had significant positive correlations with plaque stiffness (r = 0.5105, p < 0.0272 and r = 0.5312, p < 0.0193) respectively. Among the four categorized groups, calcified plaques had highest stiffness while healthy segments had the lowest. Conclusion: There is a close link between plaque morphological characteristics and mechanical properties in vivo. Plaque stiffness tends to be higher as coronary atherosclerosis advances, indicating the potential to assess plaque mechanical properties in vivo based on plaque compositions.

Original languageEnglish
Pages (from-to)21-27
Number of pages7
JournalInternational Journal of Cardiology
Volume371
DOIs
StatePublished - Jan 15 2023

Keywords

  • Coronary atherosclerosis
  • Finite element analysis
  • In vivo plaque material properties
  • Plaque morphology
  • Vulnerable plaque

Fingerprint

Dive into the research topics of 'Quantification of patient-specific coronary material properties and their correlations with plaque morphological characteristics: An in vivo IVUS study'. Together they form a unique fingerprint.

Cite this