Numerical study of hemodynamic and diagnostic parameters affected by stenosis in bifurcated artery
Jianfei Song1,2, Smaine Kouidri3,4, Farid Bakir1
1LIFSE, Arts et Metiers Institute of Technology, CNAM, LIFSE, HESAM University, Paris, France.
Insights
This study uses computational fluid dynamics to analyze coronary artery stenosis development. Findings reveal how initial stenosis location and severity influence lesion progression and diagnostic assessments.
Area of Science:
- Cardiovascular Research
- Biomedical Engineering
- Computational Fluid Dynamics
Background:
- Coronary artery stenosis, particularly in bifurcations, is a significant cardiovascular concern.
- Computational Fluid Dynamics (CFD) has been used to study hemodynamic changes in stenotic arteries.
- Existing research often focuses on hemodynamic parameters, with less emphasis on stenosis development and diagnostic lesion assessment.
Purpose of the Study:
- To evaluate stenosis development and diagnostic lesion assessments in bifurcated coronary arteries.
- To investigate the influence of initial stenosis location on lesion progression.
- To analyze the impact of varying stenosis severity, length, and pulse rates on hemodynamic and diagnostic parameters.
Main Methods:
- Utilized a 2D unsteady Computational Fluid Dynamics (CFD) model for a bifurcated coronary artery with an initial stenosis.
- Simulated various initial stenosis source locations.
- Investigated different stenosis severities (30%, 50%, 70% diameter stenosis), lengths (3mm, 6mm, 9mm), and pulse rates (75, 100, 120 bpm).
Main Results:
- The location of the initial stenosis source significantly impacts the orientation of subsequent stenosis development.
- Stenosis severity, length, and pulse rate were systematically varied to observe their effects.
- Hemodynamic and practical diagnostic parameters were evaluated under different conditions.
Conclusions:
- Initial stenosis location is a critical factor determining the progression pattern of coronary artery disease.
- Understanding these factors aids in developing more accurate diagnostic lesion assessments.
- CFD modeling provides valuable insights into the complex mechanisms of stenotic development in coronary bifurcations.
Abstract:
Stenosis in the bifurcated coronary artery has attracted wide attention among the researchers. Many investigations have been carried out by means of Computational Fluid Dynamics (CFD) to better understand the physical mechanism inside the stenotic bifurcated artery. However, the main focus of the existing publications is limited to the variation of hemodynamic parameters affected by the stenosis and bifurcation structure. The present study aims to make further evaluations of stenosis development and diagnostic lesion assessments based on the critical values of hemodynamic and practical diagnostic parameters. The bifurcated coronary artery with initial stenosis source has been studied in 2 D unsteady model. Different locations of initial stenosis source have been found to greatly affect the orientation of the further stenosis development. In addition, different stenosis severities (diameter stenosis: 30%, 50% and 70%), different stenosis lengths (3 mm, 6 mm and 9 mm) and different pulse rates (75 bpm, 100 bpm and 120 bpm) as controlling parameters have been investigated.
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