Between-method correlation in quantifying internal carotid stenosis.

Sitzer, Matthias; Fürst, G.; Fischer, H; Siebler, Mario; Fehlings, T; Kleinschmidt, Andreas; Kahn, T.; Steinmetz, Helmuth

doi:10.1161/01.str.24.10.1513

Cited by 95 publications

(55 citation statements)

References 34 publications

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“…4 ' 14 Exclusion criteria were application of an ionic contrast medium within 24 hours before or after the intended application of SH U 508 A, pregnancy or lactation, or a history of galactosemia. Written informed consent was obtained from each patient before entry into the study.…”

Section: Subjects and Methods Patientsmentioning

confidence: 99%

“…4 -5 ' 1520 - 21 Compared with continuous-wave Doppler sonography and conventional duplex B-mode imaging, nonenhanced CDDI has already improved the sensitivity for detecting minimal residual blood flow in preocclusive conditions. 4 -8 - 22 Our data suggest that enhanced CDDI may go one step further by being capable of detecting flow even within the narrowest parts of high-grade stenoses and in the poststenotic slow-flow segment, where flow signal intensities may be below the detection thresholds of nonenhanced CDDI (Fig 3).…”

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confidence: 99%

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Usefulness of an intravenous contrast medium in the characterization of high-grade internal carotid stenosis with color Doppler-assisted duplex imaging.

Sitzer

Fürst

Siebler

et al. 1994

Stroke

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Background and PurposeThe remaining limitations of ultrasonographic imaging in accurately quantifying internal carotid stenosis or diagnosing internal carotid occlusion may be overcome by enhancing the echogenicity of flowing arterial blood with contrast agents. This study assessed the usefulness of the intravenous (transpulmonary) contrast medium SH U 508 A in improving the characterization and quantification of severe internal carotid stenosis.Methods We examined 32 patients (30 had vessels with a stenosis of greater than 70% luminal narrowing and 2 had vessel occlusions) using a 7.5 -MHz linear-array transducer for color Doppler-assisted duplex imaging before and after injection of the contrast medium.Results The SH U 508 A-induced increase in carotid blood echogenicity began 11 ±2 (mean±SD) seconds after the start

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Section: Subjects and Methods Patientsmentioning

confidence: 99%

mentioning

confidence: 99%

Usefulness of an intravenous contrast medium in the characterization of high-grade internal carotid stenosis with color Doppler-assisted duplex imaging.

Sitzer

Fürst

Siebler

et al. 1994

Stroke

Self Cite

View full text Add to dashboard Cite

show abstract

“…"Pseudo-occlusion" has been used for the appearance of a collapsed artery, [1][2][3][4][5][6][7][8][9]11,[13][14][15][16][17][18][19][20][45][46][47][48][56][57][58][59][60][61][62][65][66][67][68][69][70] but also quite literally when diagnosis changed from occlusion to patent after re-review (not necessarily with distal collapse. 10,12,55,63,64,81 String Sign. The "string sign" was first used for distal ICA collapse in spontaneous dissection as coined by Ojemann et al in 1972.…”

Section: Figmentioning

confidence: 99%

Carotid Near-Occlusion: A Comprehensive Review, Part 1—Definition, Terminology, and Diagnosis

Johansson

Fox

2015

AJNR Am J Neuroradiol

105

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SUMMARY:Carotid near-occlusion is distal ICA luminal collapse beyond a tight stenosis, where the distal lumen should not be used for calculating percentage stenosis. Near-occlusion with full ICA collapse is well-known, with a threadlike lumen. However, near-occlusion without collapse is often subtle and can be overlooked as a usual severe stenosis. More than 10 different terms have been used to describe near-occlusion, sometimes causing confusion. This systematic review presents what is known about carotid near-occlusion. In this first part, the foci are definition, terminology, and diagnosis. ABBREVIATION: ECA ϭ external carotid artery

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“…Ultrasonographic evaluation of arterial stenoses and occlusions was performed according to previously published criteria. 17,18 …”

Section: Eccs Studiesmentioning

confidence: 99%

Assessment of ≥50% and <50% Intracranial Stenoses by Transcranial Color-Coded Duplex Sonography

Baumgartner

Mattle

Schroth

1999

Stroke

269

184

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Background and Purpose-A favorable risk-benefit ratio for warfarin compared with aspirin has been reported for the prevention of major vascular events in symptomatic Ն50% intracranial stenoses. Transcranial color-coded duplex sonography (TCCS) criteria providing an accurate detection of Ն50% and Ͻ50% stenoses of the anterior, middle, and posterior cerebral arteries and basilar and vertebral arteries were evaluated retrospectively with angiography used as the standard of reference. Methods-Prospectively collected TCCS, extracranial color-coded duplex sonography, and intra-arterial digital subtraction angiography data of 310 patients were reviewed. The patients had angiography for confirmation of symptomatic extracranial Ն70% carotid stenoses, symptomatic stenoses (peak systolic velocity higher than the corresponding mean value ϩ2 SDs of 104 normal subjects), and occlusions of the middle cerebral or basilar artery previously assessed by ultrasound. The sonographer was not aware of angiographic findings. Results-TCCS would have detected all 31 of Ն50% intracranial stenoses with 1 false-positive and 35 of 38 Ͻ50% stenoses with 3 false-positives. One of 69 stenoses (1%) and 280 of 2741 normal arteries (10%) were missed because of inadequate insonation windows. The corresponding peak systolic velocity cutoffs for Ն50%/Ͻ50% stenoses were Ն155/Ն120 cm/s (anterior cerebral artery), Ն220/Ն155 cm/s (middle cerebral artery), Ն145/Ն100 cm/s (posterior cerebral artery), Ն140/Ն100 cm/s (basilar artery), and Ն120/Ն90 cm/s (vertebral artery). Conclusions-TCCS may reliably assess Ն50% and Ͻ50% basal cerebral artery narrowing and prove useful for noninvasive management of patients with symptomatic intracranial stenoses. (Stroke. 1999;30:87-92.)

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Between-method correlation in quantifying internal carotid stenosis.

Abstract: Background and Purpose: The degree of internal carotid stenosis has emerged as the most important predictor of ischemic stroke in extracranial carotid artery disease. The purpose of this study was to assess

Cited by 95 publications

References 34 publications

Usefulness of an intravenous contrast medium in the characterization of high-grade internal carotid stenosis with color Doppler-assisted duplex imaging.

Usefulness of an intravenous contrast medium in the characterization of high-grade internal carotid stenosis with color Doppler-assisted duplex imaging.

Carotid Near-Occlusion: A Comprehensive Review, Part 1—Definition, Terminology, and Diagnosis

Assessment of ≥50% and <50% Intracranial Stenoses by Transcranial Color-Coded Duplex Sonography

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