Abstract
Biomechanics plays a critical role in coronary artery disease development. FSI simulation is commonly used to understand the hemodynamics and mechanical environment associated with atherosclerosis pathology. To provide a comprehensive characterization of patient-specific coronary biomechanics, an analysis of FSI simulation in the spatial and temporal domains was performed. In the current study, a three-dimensional FSI model of the LAD coronary artery was built based on a patient-specific geometry using COMSOL Multiphysics. The effect of myocardial bridging was simulated. Wall shear stress and its derivatives including time-averaged wall shear stress, wall shear stress gradient, and OSI were calculated across the cardiac cycle in multiple locations. Arterial wall strain (radial, circumferential, and longitudinal) and von Mises stress were calculated. To assess perfusion, vFFR was calculated. The results demonstrated the FSI model could identify regional and transient differences in biomechanical parameters within the coronary artery. The addition of myocardial bridging caused a notable change in von Mises stress and an increase in arterial strain during systole. The analysis performed in this manner takes greater advantage of the information provided in the space and time domains and can potentially assist clinical evaluation.
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Abbreviations
- LAD:
-
Left anterior descending coronary artery
- CFD:
-
Computational fluid dynamics
- FSI:
-
Fluid–structure interaction
- OSI:
-
Oscillatory shear index
- vFFR:
-
Virtual fractional flow reserve
- FFR:
-
Fractional flow reserve
- CTA:
-
Computed tomography angiography
- WSS:
-
Wall shear stress
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This work was partially supported by the 5T32GM127253 Scholars in BioMedical Sciences Program at Stony Brook University.
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Fandaros, M., Li, Y.Y., Cao, J.J. et al. A spatiotemporal analysis of the left coronary artery biomechanics using fluid–structure interaction models. Med Biol Eng Comput 61, 1533–1548 (2023). https://doi.org/10.1007/s11517-023-02791-5
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DOI: https://doi.org/10.1007/s11517-023-02791-5