Effects of Plaque Classification and Bifurcation Angle on Coronary Plaques: A Hemodynamic Simulation
10.16156/j.1004-7220.2022.04.16
- VernacularTitle:冠状动脉斑块分型及分叉角度对斑块影响的血液动力学模拟
- Author:
Xiaotong YAN
1
;
Kai YUE
1
;
Yan ZHANG
1
;
Xinxin ZHANG
1
Author Information
1. School of Energy and Environmental Engineering, University of Science and Technology Beijing
- Publication Type:Journal Article
- Keywords:
coronary artery;
bifurcation angle;
plaque classification;
blood flow;
fluidsolid interaction simulation
- From:
Journal of Medical Biomechanics
2022;37(4):E676-E683
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the influence of plaque classification and bifurcation angle on hemodynamics in coronary artery, so as to further discuss the influence on vulnerable atherosclerotic plaques. Methods Based on average geometric parameters of human coronary bifurcation vessels, the model of fluid-solid interaction for coronary bifurcation vessels with different plaque classifications and vessel bifurcation angles was constructed, and the distributions of blood flow velocity, pressure and shear stress at critical positions were investigated. Results The upstream shoulder of the plaque was the site with the highest shear stress on plaque surface, which was prone to ulceration or rupture with further growth. When there were plaques on one side of the bifurcation vessels, the shear stress at the carina of bifurcations was greater than that at the bilateral plaques. The pressure and shear stress at the carina of bifurcations gradually increased as the bifurcation angle decreased. Conclusions When there are plaques on one side of the bifurcation vessels, the probability of ulceration or rupture is greater. The presence of plaque in main vessels can promote formation and growth of the plaque at bifurcations. The inner wall of blood vessels at the carina of bifurcations is more easily damaged in the case of small angle vessels. The results can provide theoretical references for the design and optimization of vulnerable atherosclerotic plaque treatment.
