An Engineering Analysis of the Aortic Valve Dynamics in Patients with Rotary Left Ventricular Assist Devices

    Authors

    G. Faragallah;M. A. Simaan

    Comments

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    Abbreviated Journal Title

    J. Healthc. Eng.

    Keywords

    aortic valve; left ventricular assist devices; bridge to recovery; HEART-FAILURE; THERAPY; Health Care Sciences & Services

    Abstract

    The use of a rotary Left Ventricular Assist Device (LVAD) as a bridge-to-recovery treatment is gaining considerable attention in the LVAD research community. Using a mathematical model of the cardiovascular-LVAD system, this paper intends to define the critical control parameters in terms of power and rotational speed of the LVAD to ensure normal dynamics of the aortic valve for different levels of patient's activity and severity of heart failure. The effects of permanent closure of the aortic valve on the hemodynamics of the patient and the pump flow characteristics, if the critical control values are exceeded, are also examined. Additionally, LVAD power and speed control parameters that yield a given percentage of the cardiac cycle during which the aortic valve remains open are examined indicating that the severity of the heart failure is a very important factor in deciding the appropriateness of the LVAD as a bridge-to recovery treatment.

    Journal Title

    Journal of Healthcare Engineering

    Volume

    4

    Issue/Number

    3

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    307

    Last Page

    327

    WOS Identifier

    WOS:000323893100001

    ISSN

    2040-2295

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