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Proceedings Paper

The characterisation of blood rotation in a human heart chamber based on statistical analysis of vorticity maps
Author(s): Kelvin K. L. Wong; Richard M. Kelso; Stephen G. Worthley; Prashanthan Sanders; Jagannath Mazumdar; Derek Abbott
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Paper Abstract

Modelling of non-stationary cardiac structures is complicated by the complexity of their intrinsic and extrinsic motion. The first known study of haemodynamics due to the beating of heart was made by Leonardo Da Vinci, giving the idea of fluid-solid interaction by describing how vortices develop during cardiac structural interaction with the blood. Heart morphology affects in changes of cardio dynamics during the systolic and diastolic phrases. In a chamber of the heart, vortices are discovered to exist as the result of the unique morphological changes of the cardiac chamber wall by using flow-imaging techniques such as phase contrast magnetic resonance imaging. The first part of this paper attempts to quantify vortex characteristics by means of calculating vorticity numerically and devising two dimensional vortical flow maps. The technique relies on determining the properties of vorticity using a statistical quantification of the flow maps and comparison of these quantities based on different scenarios. As the characteristics of our vorticity maps vary depending on the phase of a cardiac cycle, there is a need for robust quantification method to analyse vorticity. In the second part of the paper, the approach is then utilised for examining vortices within the human right atrium. Our study has shown that a proper quantification of vorticity for the flow field can indicate the strength and number of vortices within a heart chamber.

Paper Details

Date Published: 30 December 2008
PDF: 10 pages
Proc. SPIE 7270, Biomedical Applications of Micro- and Nanoengineering IV and Complex Systems, 72700W (30 December 2008); doi: 10.1117/12.810703
Show Author Affiliations
Kelvin K. L. Wong, The Univ. of Adelaide (Australia)
Richard M. Kelso, The Univ. of Adelaide (Australia)
Stephen G. Worthley, The Univ. of Adelaide (Australia)
Prashanthan Sanders, The Univ. of Adelaide (Australia)
Jagannath Mazumdar, The Univ. of Adelaide (Australia)
Derek Abbott, The Univ. of Adelaide (Australia)

Published in SPIE Proceedings Vol. 7270:
Biomedical Applications of Micro- and Nanoengineering IV and Complex Systems
Dan V. Nicolau; Guy Metcalfe, Editor(s)

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