Description
We studied left ventricular flow patterns for a range of rotational orientations of a bileaflet mechanical heart valve (MHV) implanted in the mitral position of an elastic model of a beating left ventricle (LV). The valve was rotated through 3 angular positions (0, 45, and 90 degrees) about the LV long axis. Ultrasound scans of the elastic LV were obtained in four apical 2-dimensional (2D) imaging projections, each with 45 degrees of separation. Particle imaging velocimetry was performed during the diastolic period to quantify the in-plane velocity field obtained by computer tracking of diluted microbubbles in the acquired ultrasound projections. The resulting velocity field, vorticity, and shear stresses were statistically significantly altered by angular positioning of the mechanical valve, although the results did not show any specific trend with the valve angular position and were highly dependent on the orientation of the imaging plane with respect to the valve. We conclude that bileaflet MHV orientation influences hemodynamics of LV filling. However, determination of ‘optimal’ valve orientation cannot be made without measurement techniques that account for the highly 3-dimensional (3D) intraventricular flow.
Details
Title
- Effects of Bileaflet Mechanical Mitral Valve Rotational Orientation on Left Ventricular Flow Conditions
Contributors
- Westerdale, John (Author)
- Adrian, Ronald (Author)
- Squires, Kyle (Author)
- Chaliki, Hari (Author)
- Belohlavek, Marek (Author)
- Ira A. Fulton Schools of Engineering (Contributor)
- School for the Engineering of Matter, Transport and Energy (Contributor)
Date Created
The date the item was original created (prior to any relationship with the ASU Digital Repositories.)
2015-06-26
Resource Type
Collections this item is in
Identifier
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Digital object identifier: 10.2174/1874192401509010062
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Identifier TypeInternational standard serial numberIdentifier Value1874-1924
Note
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The final version of this article, as published in The Open Cardiovascular Medicine Journal, can be viewed online at: https://benthamopen.com/ABSTRACT/TOCMJ-9-62
Citation and reuse
Cite this item
This is a suggested citation. Consult the appropriate style guide for specific citation guidelines.
Westerdale, J. C., Adrian, R., Squires, K., Chaliki, H., & Belohlavek, M. (2015). Effects of Bileaflet Mechanical Mitral Valve Rotational Orientation on Left Ventricular Flow Conditions. The Open Cardiovascular Medicine Journal, 9(1), 62-68. doi:10.2174/1874192401509010062