Slow walking


FIGURE 24 Venous pressure is measured in a patient's foot. While the patient stands quietly, pressure approaches 80 mm Hg because of the hydrostatic column. When the muscle pump is evoked by slow walking, however, pressure quickly falls to less than 20 mmHg. (Modified from Noddeland H, Ingemansen R, Reed RK, Clin Physiol 1983; 3:573.)

refill from the periphery. This "muscle pump'' is very important. Figure 24 shows venous pressure in the foot of an individual standing quietly and while walking. Note how walking causes the muscle pump to greatly reduce venous pressure in the foot and that the muscle pump also increases the AP for flow through the leg muscles by lowering venous pressure as they exercise.

Suggested Readings

Fahraeus R, Lindquist T. The viscosity of the blood in narrow capillary tubes. Am J Physiol 1931; 96:562 Hallock P, Benson IC. Studies on the elastic properties of human isolated aorta. Clin Invest 1937; 16:596 Noddeland H, Ingemansen R, Reed RK. A telemetric technique for studies of venous pressure in venous blood from the human foot in orthostasis. Clin Physiol 1983; 3:573

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Get Rid of Gallstones Naturally

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