The Journal of Thoracic and Cardiovascular Surgery
Volume 136, Issue 4 , Pages 820-833 , October 2008

Energy loss for evaluating heart valve performance

  • Cary W. Akins, MD

      Affiliations

    • Division of Cardiac Surgery, Massachusetts General Hospital, Boston, Mass
    • Corresponding Author InformationAddress for reprints: Cary W. Akins, MD, Department of Surgery, Cox 648, Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114.
    • ,
  • Brandon Travis, PhD

      Affiliations

    • T-Forskning, Skejby Sygehus, Brendstrupgaardsvej, 8200 Ǻrhus N, Denmark
    • ,
  • Ajit P. Yoganathan, PhD

      Affiliations

    • Wallace H. Coulter School of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Ga

Received 14 August 2007 ,Revised 4 December 2007 ,Accepted 18 December 2007.

  • Image Result

    Pressure-volume diagram of one cardiac cycle.

    Pressure-volume diagram of one cardiac cycle.

  • Image Result

    Flow velocity profile under laminar conditions (A) and turbulent conditions (B).

    Flow velocity profile under laminar conditions (A) and turbulent conditions (B).

  • Image Result

    Turbulence resulting from interruption of laminar flow by an irregularity in a vessel wall.

    Turbulence resulting from interruption of laminar flow by an irregularity in a vessel wall.

  • Image Result

    Flow separation created by various shapes inserted into flow stream: A, spherical ball; B, teardrop; C, ball with lateral protrusions; D, disc.

    Flow separation created by various shapes inserted into flow stream: A, spherical ball; B, teardrop; C, ball with lateral protrusions; D, disc.

  • Image Result

    Energy changes in schematic arterial stenosis: Energy changes per unit volume of blood (top) and schematic arterial stenosis (bottom).

    Energy changes in schematic arterial stenosis: Energy changes per unit volume of blood (top) and schematic arterial stenosis (bottom).

  • Image Result

    Differences in effective orifice area depending on abrupt contraction (A) and gradual contraction (B).

    Differences in effective orifice area depending on abrupt contraction (A) and gradual contraction (B).

PII: S0022-5223(08)00465-0

doi: 10.1016/j.jtcvs.2007.12.059

The Journal of Thoracic and Cardiovascular Surgery
Volume 136, Issue 4 , Pages 820-833 , October 2008

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