[Blood distribution in the human leg arteries during orthostasis: role of the hydrostatic factor and posturotonic straining of the anti-gravity muscles].
Ultrasonic visualization and dopplerography were used to study volumetric blood flows along the femoral artery, deep artery of the thigh, and the popliteal and sural arteries in normal volunteers. Active standing test resulted in significant blood redistribution among the arteries with prioritized blood supply to predominantly anti-g muscles but not to predominantly locomotor muscles. Elimination of static loading on the anti-g muscles by weight removal (transfer of the body mass on the other leg) was conducive to the opposite effect, i.e. absolute and relative decreases in the intensity of blood flow along the sural artery and a relatively more marked blood redistribution toward the deep artery of the thigh.
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D000328:Adult; D001783:Blood Flow Velocity / Q000502:physiology; D004244:Dizziness; D005260:Female; D005263:Femoral Artery / Q000000981:diagnostic imaging / Q000502:physiology*; D006801:Humans; D008124:Locomotion / Q000502:physiology; D035002:Lower Extremity / Q000098:blood supply* / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011150:Popliteal Artery / Q000000981:diagnostic imaging / Q000502:physiology*; D016909:Tibial Arteries / Q000000981:diagnostic imaging / Q000502:physiology*; D014463:Ultrasonography