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Pulse wave propagation

J K Li, J Melbin, R A Riffle

    Circulation Research
    |August 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Pulse wave propagation is influenced by vessel geometry and viscosity. Accounting for nonlinearities and vessel taper resolves discrepancies between experimental and theoretical findings in vascular dynamics.

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    Area of Science:

    • Biomedical Engineering
    • Cardiovascular Physiology
    • Fluid Dynamics

    Background:

    • Pulse wave propagation is crucial for understanding cardiovascular health.
    • Existing models often show discrepancies between theoretical predictions and experimental data.
    • Vascular properties like elasticity, geometry, and viscosity play significant roles.

    Purpose of the Study:

    • To evaluate the contributions of vascular properties to pulse wave propagation.
    • To resolve discrepancies between different experimental methods and theoretical models.
    • To identify factors explaining variations in phase velocity and attenuation.

    Main Methods:

    • Utilized a three-point pressure technique for measurements in canine arteries (abdominal aorta, carotid, iliac, femoral).

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  • Employed both linear and nonlinear computational methods.
  • Analyzed pulse wave transmission along a continuous path (abdominal aorta to femoral artery).

    • Main Results:

    • Vessel geometric variations fully explain observed changes in phase velocity.
    • Phase velocity is frequency-independent above approximately 4 Hz.
    • Attenuation increases with higher frequencies.
    • Incorporating geometric taper, nonlinear compliance, viscosity, and nonlinear equations of motion reconciles theoretical and experimental results.

    Conclusions:

    • Vascular geometry is the primary determinant of phase velocity.
    • Nonlinear effects and viscosity are essential for accurately modeling pulse wave propagation.
    • A comprehensive model considering all factors resolves previous discrepancies in the field.