Computed tomographic and transcranial doppler sonographic findings in acute and subacute phases of middle cerebral artery strokes

Z. Leányvári, I. Vastagh, B. Fülesdi, I. Szirmai, A. Lengyel, L. Csiba, D. Bereczki

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Purpose. The aim of this study was to compare the sensitivities of visual and densitometric analyses of CT scans and transcranial Doppler sonograms (TCD) in detecting early changes in acute stroke. Methods. CT and TCD were each performed twice in 12 patients; first in the acute phase (within 28 hours of stroke onset), then in the subacute phase (mean ± standard deviation, 6 ± 3 days after onset) of a stroke. Hypodensity on the CT scans was evaluated visually, and the optical density of both the stroke region and the corresponding region on the unaffected side was measured. Measurement of flow parameters in the middle cerebral artery was carried out with TCD before or shortly (within 4 hours) after CT scanning. Results. In the acute phase, blood flow velocities were significantly lower on the affected side than they were on the unaffected side (means, 42 ± 13 and 55 ± 25 cm/second, respectively; p = 0.012). Marked asymmetry in flow velocity was found in 3 of the 4 patients who had normal CT scans in the acute phase. The asymmetry in flow velocity disappeared by the sixth day after the stroke. The resistance index did not correlate with the final infarct size. Conclusions. In some patients, the use of TCD in acute stroke may show alterations that reflect tissue damage that is undetectable on CT. Therefore, CT and TCD should be considered complementary diagnostic tools in the acute phase of stroke.

Original languageEnglish
Pages (from-to)33-37
Number of pages5
JournalJournal of Clinical Ultrasound
Volume30
Issue number1
DOIs
Publication statusPublished - 2002

Fingerprint

Middle Cerebral Artery Infarction
arteries
strokes
sonograms
Stroke
flow velocity
asymmetry
Blood Flow Velocity
optical density
Middle Cerebral Artery
blood flow
standard deviation
damage
scanning
sensitivity

Keywords

  • Blood flow velocity
  • Computed tomography
  • Ischemic stroke
  • Middle cerebral artery
  • Transcranial Doppler ultrasonography

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology
  • Acoustics and Ultrasonics

Cite this

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title = "Computed tomographic and transcranial doppler sonographic findings in acute and subacute phases of middle cerebral artery strokes",
abstract = "Purpose. The aim of this study was to compare the sensitivities of visual and densitometric analyses of CT scans and transcranial Doppler sonograms (TCD) in detecting early changes in acute stroke. Methods. CT and TCD were each performed twice in 12 patients; first in the acute phase (within 28 hours of stroke onset), then in the subacute phase (mean ± standard deviation, 6 ± 3 days after onset) of a stroke. Hypodensity on the CT scans was evaluated visually, and the optical density of both the stroke region and the corresponding region on the unaffected side was measured. Measurement of flow parameters in the middle cerebral artery was carried out with TCD before or shortly (within 4 hours) after CT scanning. Results. In the acute phase, blood flow velocities were significantly lower on the affected side than they were on the unaffected side (means, 42 ± 13 and 55 ± 25 cm/second, respectively; p = 0.012). Marked asymmetry in flow velocity was found in 3 of the 4 patients who had normal CT scans in the acute phase. The asymmetry in flow velocity disappeared by the sixth day after the stroke. The resistance index did not correlate with the final infarct size. Conclusions. In some patients, the use of TCD in acute stroke may show alterations that reflect tissue damage that is undetectable on CT. Therefore, CT and TCD should be considered complementary diagnostic tools in the acute phase of stroke.",
keywords = "Blood flow velocity, Computed tomography, Ischemic stroke, Middle cerebral artery, Transcranial Doppler ultrasonography",
author = "Z. Le{\'a}nyv{\'a}ri and I. Vastagh and B. F{\"u}lesdi and I. Szirmai and A. Lengyel and L. Csiba and D. Bereczki",
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T1 - Computed tomographic and transcranial doppler sonographic findings in acute and subacute phases of middle cerebral artery strokes

AU - Leányvári, Z.

AU - Vastagh, I.

AU - Fülesdi, B.

AU - Szirmai, I.

AU - Lengyel, A.

AU - Csiba, L.

AU - Bereczki, D.

PY - 2002

Y1 - 2002

N2 - Purpose. The aim of this study was to compare the sensitivities of visual and densitometric analyses of CT scans and transcranial Doppler sonograms (TCD) in detecting early changes in acute stroke. Methods. CT and TCD were each performed twice in 12 patients; first in the acute phase (within 28 hours of stroke onset), then in the subacute phase (mean ± standard deviation, 6 ± 3 days after onset) of a stroke. Hypodensity on the CT scans was evaluated visually, and the optical density of both the stroke region and the corresponding region on the unaffected side was measured. Measurement of flow parameters in the middle cerebral artery was carried out with TCD before or shortly (within 4 hours) after CT scanning. Results. In the acute phase, blood flow velocities were significantly lower on the affected side than they were on the unaffected side (means, 42 ± 13 and 55 ± 25 cm/second, respectively; p = 0.012). Marked asymmetry in flow velocity was found in 3 of the 4 patients who had normal CT scans in the acute phase. The asymmetry in flow velocity disappeared by the sixth day after the stroke. The resistance index did not correlate with the final infarct size. Conclusions. In some patients, the use of TCD in acute stroke may show alterations that reflect tissue damage that is undetectable on CT. Therefore, CT and TCD should be considered complementary diagnostic tools in the acute phase of stroke.

AB - Purpose. The aim of this study was to compare the sensitivities of visual and densitometric analyses of CT scans and transcranial Doppler sonograms (TCD) in detecting early changes in acute stroke. Methods. CT and TCD were each performed twice in 12 patients; first in the acute phase (within 28 hours of stroke onset), then in the subacute phase (mean ± standard deviation, 6 ± 3 days after onset) of a stroke. Hypodensity on the CT scans was evaluated visually, and the optical density of both the stroke region and the corresponding region on the unaffected side was measured. Measurement of flow parameters in the middle cerebral artery was carried out with TCD before or shortly (within 4 hours) after CT scanning. Results. In the acute phase, blood flow velocities were significantly lower on the affected side than they were on the unaffected side (means, 42 ± 13 and 55 ± 25 cm/second, respectively; p = 0.012). Marked asymmetry in flow velocity was found in 3 of the 4 patients who had normal CT scans in the acute phase. The asymmetry in flow velocity disappeared by the sixth day after the stroke. The resistance index did not correlate with the final infarct size. Conclusions. In some patients, the use of TCD in acute stroke may show alterations that reflect tissue damage that is undetectable on CT. Therefore, CT and TCD should be considered complementary diagnostic tools in the acute phase of stroke.

KW - Blood flow velocity

KW - Computed tomography

KW - Ischemic stroke

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KW - Transcranial Doppler ultrasonography

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