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Related Experiment Videos

Stroke and dolichoectatic intracranial arteries.

W Rautenberg1, A Aulich, J Röther

  • 1Department of Neurology, Klinikum Mannheim, University of Heidelberg, Germany.

Neurological Research
|January 1, 1992
PubMed
Summary

Dolichoectatic intracranial arteries, particularly in the vertebrobasilar system, were diagnosed in 45 patients. This condition, often linked to stroke, shows reduced blood flow velocities and is well-imaged with non-invasive techniques.

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Area of Science:

  • Neurology
  • Vascular Medicine
  • Radiology

Background:

  • Dolichoectasia involves abnormal widening and elongation of arteries.
  • Intracranial dolichoectasia, especially of the vertebrobasilar system, can lead to neurological deficits.
  • The role of dolichoectatic intracranial arteries in stroke pathogenesis is not fully understood.

Purpose of the Study:

  • To establish the diagnosis of dolichoectatic intracranial arteries in a patient cohort.
  • To investigate the clinical manifestations and hemodynamic characteristics of dolichoectasia.
  • To evaluate the diagnostic utility of various imaging modalities.

Main Methods:

  • Retrospective analysis of 45 patients diagnosed with dolichoectatic intracranial arteries over 6 years.
  • Assessment of vertebrobasilar dolichoectasia prevalence and associated ischemic events.

Related Experiment Videos

  • Transcranial Doppler (TCD) ultrasound to measure blood flow velocities in dolichoectatic basilar arteries.
  • Comparison with an age-adjusted control group.
  • Magnetic Resonance (MR) angiography for vascular imaging.

    • Main Results:

    • Dolichoectasia of the vertebrobasilar system was the most common finding (n=39).
    • Twenty-two patients experienced brain stem ischemia, and 10 had hemispheric events.
    • Significantly reduced peak and mean flow velocities were observed in patients with dolichoectatic basilar arteries compared to controls (p < 0.00001).
    • MR-angiography provided excellent visualization of the vascular abnormality.

    Conclusions:

    • Combined use of CT, TCD, MRI, and MR-angiography enables reliable non-invasive diagnosis of dolichoectatic intracranial arteries.
    • Dolichoectatic intracranial arteries appear to play an underestimated role in stroke, particularly affecting vertebrobasilar circulation.