Detection of carotid occlusive disease by pulsed Doppler spectral analysis.
نویسندگان
چکیده
منابع مشابه
Range-gated pulsed Doppler power frequency spectrum analysis for the diagnosis of carotid arterial occlusive disease.
Carotid arterial disease was investigated with a Duplex Scanner using Power Frequency Spectrum Analysis. Sixty-one carotid systems were evaluated noninvasively and angiographically, while 20 controls were examined and assumed to be normal. Peak frequency and 50% frequency bandwidth, a quantitative index of spectral broadening, were correlated with the percentage of stenosis. Peak frequency pred...
متن کاملSources of error in Doppler diagnosis of carotid occlusive disease.
Fifty errors with Doppler examination of 356 carotid bifurcations were examined to determine their cause and to establish methods of prevention. Only those errors related to hemodynamically significant stenosis or complete occlusion were considered. The relative frequency of errors in diagnosis of occlusion (30 false-positive or negative versus 31 true-positive) was considerably greater than th...
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BACKGROUND AND PURPOSE Distal to a hemodynamically significant stenosis, the Doppler effect becomes dampened. Thus, measuring the flow profile in the ophthalmic artery and the central retinal artery with color Doppler imaging may provide hemodynamic information about the carotid circulation. METHODS To validate the flow profile measurement with color Doppler imaging in the ophthalmic and cent...
متن کاملCarotid artery occlusive disease
• Stroke is the third most common cause of death following cardiovascular disease and cancer and is the most common cause of neurological disability. 70-85% of stroke is ischemic and 20-30% is due to atherosclerosis of CCA. • Pathogenesis: endothelial injury or dysfunction-platelet aggregation and inward migration of mononuclear cells and lymphocytes-release of growth factors-migration and prol...
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Detecting Carotid Occlusive Disease by Thermography • The ability of facial thermography to detect disease in the internal carotid artery was evaluated. Unilateral forehead cooling of 0.7°C or greater was observed in 57% of 30 cases with angiographically proved stenosis. Two provocative tests, facial cooling and a head clamp, increased the sensitivity rate to 83%. The greatest overall sensitivi...
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ژورنال
عنوان ژورنال: Journal of Neurology, Neurosurgery & Psychiatry
سال: 1984
ISSN: 0022-3050
DOI: 10.1136/jnnp.47.12.1307