Impact of coronary tortuosity on coronary pressure: Numerical simulation study

Li, Y., Shi, Z., Cai, Y., Feng, Y., Ma, G., Shen, C., Li, Z., & Liu, N. (2012) Impact of coronary tortuosity on coronary pressure: Numerical simulation study. PLoS ONE, 7(8), e42558.

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Abstract

Background:

Coronary tortuosity (CT) is a common coronary angiographic finding. Whether CT leads to an apparent reduction in coronary pressure distal to the tortuous segment of the coronary artery is still unknown. The purpose of this study is to determine the impact of CT on coronary pressure distribution by numerical simulation.

Methods:

21 idealized models were created to investigate the influence of coronary tortuosity angle (CTA) and coronary tortuosity number (CTN) on coronary pressure distribution. A 2D incompressible Newtonian flow was assumed and the computational simulation was performed using finite volume method. CTA of 30°, 60°, 90°, 120° and CTN of 0, 1, 2, 3, 4, 5 were discussed under both steady and pulsatile conditions, and the changes of outlet pressure and inlet velocity during the cardiac cycle were considered.

Results:

Coronary pressure distribution was affected both by CTA and CTN. We found that the pressure drop between the start and the end of the CT segment decreased with CTA, and the length of the CT segment also declined with CTA. An increase in CTN resulted in an increase in the pressure drop.

Conclusions:

Compared to no-CT, CT can results in more decrease of coronary blood pressure in dependence on the severity of tortuosity and severe CT may cause myocardial ischemia.

Impact and interest:

8 citations in Scopus
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7 citations in Web of Science®

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8 since deposited on 18 Nov 2015
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ID Code: 90303
Item Type: Journal Article
Refereed: Yes
DOI: 10.1371/journal.pone.0042558
ISSN: 1932-6203
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Li et al.
Copyright Statement: This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Deposited On: 18 Nov 2015 02:15
Last Modified: 11 Dec 2015 02:43

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