Quantitation of carotid stenosis with continuous-wave (C-W) Doppler ultrasound.
نویسندگان
چکیده
منابع مشابه
Quantitation of carotid stenosis with continuous-wave (C-W) Doppler ultrasound.
Two methods for determining the degree of stenoses developing on the origin of the internal carotid were tested using non-invasive Doppler ultrasonic imaging (DOPSCAN) of the carotid bifurcations. Spectral analysis of Doppler audio recordings was utilized in determining the maximum frequencies found within the stenosis, as well as the ratio of the frequency downstream to the stenosis, to the fr...
متن کاملEvaluation of aortic stenosis by continuous wave Doppler ultrasound.
Twenty-four patients with suspected aortic stenosis (Group I) were evaluated noninvasively by continuous wave Doppler ultrasound before undergoing cardiac catheterization. Twenty normal subjects served as the control group (Group II). Maximal velocity measurements in the ascending aorta ranged from 3.0 to 5.8 m/s (mean 4.34 +/- 0.65) in Group I versus 1.0 to 1.6 m/s (mean 1.28 +/- 0.16) in Grou...
متن کاملCarotid doppler ultrasound evaluation in patients with lichen planus
Background: Lichen planus is a chronic inflammatory disease associated with an increased risk of subclinical atherosclerosis and cardiovascular diseases. This study aimed to evaluate patients with lichen planus using carotid Doppler ultrasound parameters.Methods: Forty patients with lichen planus and 40 controls were included in this study. Common carotid...
متن کاملCorrelation of continuous-wave Doppler spectral flow analysis with gross pathology in carotid stenosis.
Preoperative continuous-wave Doppler spectral analysis was used to generate two parameters, peak frequency in the internal carotid artery (fmax) and the ratio of peak frequencies in the internal and common carotid arteries (carotid index). These were compared with direct measurement of residual lumen diameter in pathologic specimens obtained from carotid endarterectomy in 37 patients. Doppler s...
متن کاملCervical carotid imaging with a continuous-wave Doppler flowmeter.
Cervical Carotid Imaging With a ContinuousWave Doppler Flowmeter • A noninvasive technique for carotid arteriography using an ultrasonic directional Doppler flowmeter to image the carotid bifurcations is described. The technique uses a position sensing arm to hold the sharply focusing probe and translates the position of arterial flow onto an image storage screen. By multiple manual sweeps acro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Stroke
سال: 1979
ISSN: 0039-2499,1524-4628
DOI: 10.1161/01.str.10.3.326