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Between-method correlation in quantifying internal carotid stenosis

M Sitzer1, G Fürst, H Fischer

  • 1Department of Neurology, Heinrich-Heine-University, Düsseldorf, Germany.

Stroke
|October 1, 1993
PubMed
Summary
This summary is machine-generated.

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Noninvasive techniques like continuous-wave Doppler and color duplex ultrasonography accurately assess internal carotid artery stenosis compared to angiography. These methods are reliable for treatment decisions in carotid artery disease.

Area of Science:

  • Vascular imaging and diagnostics
  • Neurology and stroke prevention
  • Medical technology assessment

Background:

  • Internal carotid artery stenosis is a key predictor of ischemic stroke.
  • Accurate quantification of stenosis is crucial for patient management.
  • Intra-arterial angiography is the current gold standard for measurement.

Purpose of the Study:

  • To validate noninvasive techniques against intra-arterial angiography for internal carotid stenosis.
  • To assess the accuracy of Doppler ultrasonography and magnetic resonance angiography.
  • To determine the suitability of noninvasive methods for clinical decision-making.

Main Methods:

  • Compared intra-arterial digital subtraction angiography with noninvasive methods.
  • Evaluated continuous-wave Doppler, pulsed-wave Doppler, color Doppler duplex, and MRA.

Related Experiment Videos

  • Analyzed 77 cases of stenosis and 20 of occlusion in symptomatic patients.

    • Main Results:

    • Continuous-wave Doppler, color duplex, and MRA showed strong correlations (r > .90) with angiography.
    • Continuous-wave Doppler and color duplex had higher predictive values for 70%-99% stenosis.
    • Ultrasonographic techniques were more accurate for high-grade stenosis due to MRA's "flow gap" issue.

    Conclusions:

    • Noninvasive methods effectively identify and quantify high-grade internal carotid stenosis.
    • These techniques are sufficient for guiding treatment decisions.
    • The accuracy of Doppler and color duplex for 60%-99% stenosis may be underestimated.