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- W2061541702 abstract "Objective: The aim of this study was to compare velocities in the common carotid artery calculated by using the Doppler angle correct set at 44° and 60° (by heel-toeing the transducer) to see if there is any consistent difference in velocity values. Methods: A total number of 10 patients were selected. Each patient was examined by two sonographers who did not know the results from the other sonographer. The peak systolic velocities of both right and left mid common carotid arteries were measured three times with the angle correct set at 44° and three times at 60°. The heel-toe technique was used to get the artery parallel with the angle correct set at 44° and 60°. Intra- and interobserver errors were calculated in addition to average and standard deviations for the results obtained at 60° versus 44°. Results: A total number of 240 peak systolic velocities of CCA were obtained. All the measurements with the Doppler angle of 60° were increased compared to the measurements obtained at 44°. The average velocity of the right CCA was 93 cm/sec at 60° and 74 cm/sec at 44°, a significant difference of 19 cm/sec or 26%. Similar results were achieved on the left CCA. The average velocities of the left CCA were 98 cm/sec at 60° compared to 80 cm/sec at 44°, a significant difference of 18 cm/sec or 23%. Also, the PW spectral Doppler obtained at 44° showed a stronger Doppler trace as well as a good color filling compared to the 60° angle. Conclusions: A Doppler angle of 60° will increase the velocity values significantly compared to 44°, and this may require a new comprehensive study to compare the velocities in the stenotic ICA at 44° vs 60° with resultant changes in the ICA/CCA ratio in relation to the NASCET classification for the carotid stenosis. Because the carotid ultrasound is the examination of choice to noninvasively evaluate patients with atherosclerotic disease, the Doppler angle is critical in correctly quantifying flow velocities to categorize the severity of the carotid disease. Tabled 1ResultsRT CCA at 60°RT CCA at 44°LT CCA at 60°LT CCA at 44°Number of measurements60606060Overall average (cm/sec)93 ± 2274 ± 1598 ± 2180 ± 17Velocity change (%)+26+23 Open table in a new tab" @default.
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- W2061541702 date "2003-05-01" @default.
- W2061541702 modified "2023-09-27" @default.
- W2061541702 title "Velocity quantifications in the carotid ultrasound with Doppler angle set at 44° vs 60°" @default.
- W2061541702 doi "https://doi.org/10.1016/s0301-5629(03)00166-2" @default.
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