Doppler blood velocity waveforms and the relation to peripheral resistance in the brachial artery.
The relationship between peripheral resistance and the Doppler blood velocity indices--pulsatility index (PI), A/B ratio, resistance index (RI), and the minimum velocity (Vmin)--was evaluated in the brachial arteries of five young women. All the indices showed a very good correlation with resistance (r greater than 94%); the regression line for both PI and A/B were linear, whereas the relationships between resistance and RI, and resistance and Vmin, were best described by a logarithmic and by power function, respectively. Although the women were carefully selected to be as alike as possible, there were significant differences in the individual slopes of the regression lines.
Legarth
J
J
Department of Obstetrics and Gynaecology, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia.
Nolsoe
C
C
D000328:Adult; D001783:Blood Flow Velocity / Q000502:physiology*; D001916:Brachial Artery / Q000502:physiology*; D005260:Female; D006801:Humans; D011673:Pulsatile Flow / Q000502:physiology; D014465:Ultrasonics; D014463:Ultrasonography; D014655:Vascular Resistance / Q000502:physiology