Blood velocity patterns in 12 arteries of 11 young adults demonstrated that peripheral resistance is of major importance for both the mean velocity and the shape of the velocity pattern.
Observational (n=11)
This physiological study demonstrates that peripheral resistance significantly influences both the mean velocity and the shape of the arterial blood velocity pattern.
Blood velocities in 12 arteries were recorded by an ultrasonic doppler flowmeter in 11 young adults. Two major types of velocity patterns existed at rest. In certain arteries (the common carotid, the external carotid, the superficial temporal and the proper palmar digital arteries) flow was towards the periphery throughout the entire pulse cycle. Other arteries (the common femoral, the popliteal, the posterior tibial and the pedal artery) exhibited retrograde flow in part of the pulse cycle. In each individual a spontaneous variation between these two velocity patterns was observed in the subclavian, the axillary, the brachial and the radial artery. The velocity pattern of each artery is described, and absolute blood velocities at recognizable instances during the pulse cycle are given. The influence of peripheral resistance on the velocity pattern was investigated by reactive hyperaemia of the femoral artery. We find that not only is there an upward displacement of the resting femoral curve relative to the line of zero, but the shape of the velocity pattern is also changed. Our conclusion is that peripheral resistance is of major importance not only for the mean velocity, but also for the shape of the velocity pattern in the artery.
Risöe et al. (1978) reported an observational. Peripheral resistance (reactive hyperaemia) was evaluated on Blood velocity patterns and absolute blood velocities. Blood velocity patterns in 12 arteries of 11 young adults demonstrated that peripheral resistance is of major importance for both the mean velocity and the shape of the velocity pattern.