https://scholars.lib.ntu.edu.tw/handle/123456789/590589
標題: | Evaluation of vertebral artery hypoplasia and asymmetry by color-coded duplex ultrasonography | 作者: | JIANN-SHING JENG Yip P.-K. |
公開日期: | 2004 | 卷: | 30 | 期: | 5 | 起(迄)頁: | 605-609 | 來源出版物: | Ultrasound in Medicine and Biology | 摘要: | Distinguishing stenosis and hypoplasia of the extracranial vertebral artery (VA) is clinically important, but there is no agreement in defining VA hypoplasia. We endeavored to attain reference values for VA flow volume by color Doppler ultrasonography (CDU), analyze age and gender effects on VA flow volume and develop a definition of VA hypoplasia. CDU was performed in 447 subjects free of cerebrovascular diseases or carotid stenosis. The VA diameter, peak systolic velocity, end-diastolic velocity, time-averaged mean velocity, resistance index (RI) and flow volume were recorded bilaterally. We found significant asymmetries in diameter, flow velocities and flow volume with left-sided dominance. Diameters were different on left (0.297 ± 0.052 cm) and right (0.323 ± 0.057) sides (p < 0.001). Flow volume was different on right (83.0 ± 36.9 mL/min) and left (96.6 ± 42.4) sides (p < 0.001). Women had significantly smaller diameters, higher flow velocities and lower RIs than men. VA flow volume did not change with aging. We defined hypoplasia as a significant decrease in flow velocities and increase in RI for VA diameters < 0.22 cm. This definition is supported by findings of an increase in ipsilateral flow resistance (RI ? 0.75), contralateral diameter (side-to-side diameter difference ? 0.12 cm), and flow volume (side-to-side flow volume ratio ? 5). This definition and these reference values may lead to better differentiation between congenital variation and steno-occlusion clinically. (E-mail: jsjeng@ccms.ntu.edu.tw) ? 2004 World Federation for Ultrasound in Medicine & Biology. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-2942596166&doi=10.1016%2fj.ultrasmedbio.2004.03.004&partnerID=40&md5=1a6cae0c42ca516af6094adf6ecb8f14 https://scholars.lib.ntu.edu.tw/handle/123456789/590589 |
ISSN: | 3015629 | DOI: | 10.1016/j.ultrasmedbio.2004.03.004 | SDG/關鍵字: | Cardiovascular system; Disease control; Hemodynamics; Medicine; Tissue; Ultrasonics; Color Doppler ultrasonography (CDU); Vertebral artery (VA); Blood vessels; adolescent; adult; aged; artery blood flow; artery diameter; artery dysplasia; article; carotid artery obstruction; cerebrovascular disease; controlled study; differential diagnosis; Doppler echography; evaluation; female; flow rate; heart ventricle enddiastolic pressure; human; major clinical study; male; priority journal; vertebral artery; vertebral artery hypoplasia; vertebral artery stenosis; Adolescent; Adult; Aged; Aged, 80 and over; Aging; Blood Flow Velocity; Female; Hemodynamic Processes; Humans; Male; Middle Aged; Sex Factors; Ultrasonography, Doppler, Color; Vertebral Artery |
顯示於: | 醫學院附設醫院 (臺大醫院) |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。