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Related Experiment Videos

Arterial tortuosity.

C M Wenn1, D L Newman

  • 1Department of Medical Radiations Science, Royal Melbourne Institute of Technology, Melbourne, Victoria.

Australasian Physical & Engineering Sciences in Medicine
|June 1, 1990
PubMed
Summary
This summary is machine-generated.

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Vessel tortuosity, often overlooked, increases with age, particularly in the abdominal aorta. This geometric change impacts blood flow, potentially increasing atherosclerosis risk.

Area of Science:

  • Biomedical Engineering
  • Cardiovascular Physiology
  • Medical Imaging

Background:

  • Vessel curvature (tortuosity) is typically ignored in hemodynamic studies, with vessels often modeled as straight.
  • The assumption of straight vessels is invalid, as many, like the abdominal aorta, become tortuous with age.
  • Vessel aging may lead to loss of longitudinal stiffness, contributing to increased tortuosity.

Purpose of the Study:

  • To propose a quantitative method for evaluating vessel tortuosity.
  • To assess the prevalence and degree of abdominal aorta tortuosity in relation to age.
  • To explore the hemodynamic implications and potential role of tortuosity as a risk factor for atherosclerosis.

Main Methods:

  • Quantitative evaluation of tortuosity using the standard deviation of incremental midline displacements.

Related Experiment Videos

  • Determination of tortuosity coefficients from aortograms of 92 patients.
  • Correlation of tortuosity coefficients with patient age.

    • Main Results:

    • Patients under 40 generally exhibited low tortuosity coefficients (<0.20), similar to straight vessels.
    • A significant increase in tortuosity incidence and magnitude was observed in patients over 40.
    • Some older patients showed tortuosity coefficients several times greater than those for straight vessels.

    Conclusions:

    • Vessel tortuosity increases with age, likely due to age-related changes in vessel wall stiffness.
    • Increased tortuosity can cause flow asymmetries and abnormal wall shear stress.
    • Vessel tortuosity is a potential geometrical risk factor for atherosclerosis development.