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Carotid Doppler: low velocity as a sign of significant disease

Mindy M Horrow1, Christopher A DeMauro, Joanne S Lee

  • 1Department of Radiology, Albert Einstein Medical Center, Philadelphia, PA 19141-3098, USA. horrowm@einstein.edu

Ultrasound Quarterly
|September 9, 2008
PubMed

Insights

Diagnosing internal carotid artery (ICA) stenosis often involves looking for high velocities. However, low velocities and abnormal waveforms in related arteries can also reveal significant heart and brain vascular or valvular disease.

Area of Science:

  • Vascular Ultrasound
  • Cerebrovascular Diagnostics
  • Doppler Echocardiography

Background:

  • Hemodynamically significant stenosis of the internal carotid artery (ICA) is typically identified by elevated blood flow velocities.
  • However, reduced velocities and altered waveform patterns can also indicate critical vascular or valvular pathology.

Purpose of the Study:

  • To explore the diagnostic utility of low velocities and abnormal waveforms in the internal carotid artery (ICA) and related cerebral arteries.
  • To demonstrate how these findings can identify significant vascular or valvular disease from the heart to the brain.

Main Methods:

  • Analysis of Doppler ultrasound data, focusing on velocity measurements and waveform characteristics.
  • Evaluation of the internal carotid artery (ICA), common carotid artery, and vertebral arteries (ipsilateral and contralateral).
  • Correlation of low ICA velocity and abnormal ICA waveform with findings in other visualized vessels.

Main Results:

  • Low internal carotid artery (ICA) velocities, when combined with abnormal waveforms, suggest significant pathology.
  • Abnormal velocities and waveforms in ipsilateral or contralateral ICA, common carotid artery, and vertebral arteries provide further diagnostic clues.
  • This comprehensive analysis aids in diagnosing diverse vascular and valvular conditions.

Conclusions:

  • Reduced ICA velocity and abnormal waveforms are valuable diagnostic indicators, not just elevated velocities.
  • A thorough assessment of cerebral arterial hemodynamics can uncover significant vascular and valvular disease.
  • This approach broadens the scope of ultrasound in diagnosing conditions affecting the heart-to-brain circulation.

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