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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

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.
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    Title
    • Effects of Bileaflet Mechanical Mitral Valve Rotational Orientation on Left Ventricular Flow Conditions
    Date Created
    2015-06-26
    Resource Type
  • Text
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    Identifier
    • Digital object identifier: 10.2174/1874192401509010062
    • Identifier Type
      International standard serial number
      Identifier Value
      1874-1924
    Note
    • 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

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    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

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