Impact of cyclic bending on coronary hemodynamics

Journal article


Wang, J., Fang, R., Wu, H., Xiang, Y., Mendieta, J.B., Paritala, P.K., Fan, Z., Anbananthan, H., Catano, J.A.A., Raffel, O.C. and Li, Z. (2023). Impact of cyclic bending on coronary hemodynamics. Biomechanics and Modeling in Mechanobiology. 22, pp. 729-738. https://doi.org/10.1007/s10237-022-01677-z
AuthorsWang, J., Fang, R., Wu, H., Xiang, Y., Mendieta, J.B., Paritala, P.K., Fan, Z., Anbananthan, H., Catano, J.A.A., Raffel, O.C. and Li, Z.
Abstract

It remains unknown that the degree of bias in computational fluid dynamics results without considering coronary cyclic bending. This study aims to investigate the influence of different rates of coronary cyclic bending on coronary hemodynamics. To model coronary bending, a multi-ring-controlled fluid–structural interaction model was designed. A coronary artery was simulated with various cyclic bending rates (0.5, 0.75 and 1 s, corresponding to heart rates of 120, 80 and 60 bpm) and compared against a stable model. The simulated results show that the hemodynamic parameters of vortex Q-criterion, temporal wall shear stress (WSS), time-averaged WSS (TaWSS) and oscillatory shear index (OSI) were sensitive to the changes in cyclic rate. A higher heart rate resulted in higher magnitude and larger variance in the hemodynamic parameters. Whereas, the values and distributions of flow velocity and relative residence time (RRT) did not show significant differences between different bending periods. This study suggests that a stable coronary model is not sufficient to represent the hemodynamics in a bending coronary artery. Different heart rate conditions were found to have significant impact on the hemodynamic parameters. Thus, cyclic bending should be considered to mimic the realistic hemodynamics in future patient-specific coronary hemodynamics studies.

KeywordsCoronary cyclic bending, Hemodynamics, Fluid-structure interaction
Year2023
Journal Biomechanics and Modeling in Mechanobiology
Journal citation22, pp. 729-738
PublisherSpringer
ISSN1617-7940
Digital Object Identifier (DOI)https://doi.org/10.1007/s10237-022-01677-z
Publication dates
Print05 Jan 2023
Publication process dates
Accepted05 Dec 2022
Deposited20 Mar 2024
Accepted author manuscript
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Open
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