Wave-energy patterns in carotid, brachial, and radial arteries: a noninvasive approach using wave-intensity analysis

被引:112
作者
Zambanini, A
Cunningham, SL
Parker, KH
Khir, AW
Thom, SAM
Hughes, AD
机构
[1] St Marys Hosp, Dept Clin Pharmacol, Fac Med, London W2 1NY, England
[2] Univ London Imperial Coll Sci Technol & Med, Physiol Flow Studies Grp, Dept Bioengn, London, England
来源
AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY | 2005年 / 289卷 / 01期
关键词
hemodynamics; wave transmission; ultrasound; tonometry;
D O I
10.1152/ajpheart.00636.2003
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
The study of wave propagation at different points in the arterial circulation may provide useful information regarding ventriculoarterial interactions. We describe a number of hemodynamic parameters in the carotid, brachial, and radial arteries of normal subjects by using noninvasive techniques and wave-intensity analysis (WIA). Twenty-one normal adult subjects ( 14 men and 7 women, mean age 44 +/- 6 yr) underwent applanation tonometry and pulsed-wave Doppler studies of the right common carotid, brachial, and radial arteries. After ensemble averaging of the pressure and flow-velocity data, local hydraulic work was determined and a pressure-flow velocity loop was used to determine local wave speed. WIA was then applied to determine the magnitude, timings, and energies of individual waves. At all sites, forward-traveling ( S) and backward-traveling ( R) compression waves were observed in early systole. In mid- and late systole, forward-traveling expansion waves ( X and D) were also seen. Wave speed was significantly higher in the brachial (6.97 +/- 0.58 m/s) and radial (6.78 +/- 0.62 m/s) arteries compared with the carotid artery (5.40 +/- 0.34 m/s; P < 0.05). S-wave energy was greatest in the brachial artery (993.5 +/- 87.8 mJ/m(2)), but R-wave energy was greatest in the radial artery (176.9 +/- 19.9 mJ/m(2)). X-wave energy was significantly higher in the brachial and radial arteries (176.4 +/- 32.7 and 163.2 +/- 30.5 mJ/m(2), respectively) compared with the carotid artery (41.0 +/- 9.4 mJ/m(2); P < 0.001). WIA illustrates important differences in wave patterns between peripheral arteries and may provide a method for understanding ventriculoarterial interactions in the time domain.
引用
收藏
页码:H270 / H276
页数:7
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