The objective of this study was to explore the effects of myocardial bridge compression on blood flow, normal stress, circumferential stress and shear stress in mural coronary artery. An original mural coronary artery simulative device has been greatly improved and its measured hemodynamic parameters have been expanded from a single stress (normal stress) to multiple stresses to more fully and accurately simulate the true hemodynamic environment under normal stress, circumferential stress and shear stress. This device was used to more fully explore the relationship between hemodynamics and mural coronary atherosclerosis under the combined effects of multiple stresses. Results obtained from the mural coronary artery simulator showed stress abnormality to be mainly located in the proximal mural coronary artery where myocardial bridge compression was intensified and average and fluctuation values (maximum minus minimum) of proximal stress were significantly increased by 27.8% and 139%, respectively. It is concluded that myocardial bridge compression causes abnormalities in the proximal hemodynamics of the mural coronary artery. This is of great significance for understanding the hemodynamic mechanism of coronary atherosclerosis and has potential clinical value for the pathological effect and treatment of myocardial bridge.
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Original Research
Simulated coronary arterial hemodynamics of myocardial bridging
Hao Ding1, Ying Zhang2, Yujia Liu2, Zhilin Liu3, Chunxun Shi2, Zhichao Nie2, Zhehua Chen1, Yanjun Zeng4,*
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1
Shanghai University of Medicine & Health Sciences, Shanghai 201318, P. R. China
2
School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
3
Shanghai General Hospital, Shanghai 200080, P. R. China
4
Biomechanics & Medical Information Institute, Beijing University of Technology, No. 100 PingLeYuan, Beijing, 100022, P. R. China
*Correspondence: yjzeng@bjut.edu.cn (Yanjun Zeng)
Rev. Cardiovasc. Med. 2019, 20(4), 273–280;
https://doi.org/10.31083/j.rcm.2019.04.554
Submitted: 26 August 2019 | Accepted: 11 December 2019 | Published: 30 December 2019
Copyright: © 2019 Ding et al. Published by IMR Press.
This is an open access article under the CC BY-NC 4.0 license
https://creativecommons.org/licenses/by/4.0/.
Abstract
Keywords
Myocardial bridge
coronary artery
atherosclerosis
hemodynamics
simulative device
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Figure 1.