Investigation of cerebral circulation and peripheral microcirculation to passive postural orthostatic test

Abstract

Cerebral hemodynamics and peripheral microcirculation was studied in 44 men during a passive postural orthostatic test. 7 people had poor orthostatic stability (OS). The study of cerebral hemodynamics (REG) showed that in individuals with good OS during the test, the blood filling of the brain is reliably increased (p<0.05), in a group with poor OS it practically does not change. The background dates of cerebral blood flow in the group with poor stability are significantly lower (p<0.001) relative to the parameters of the group with good tolerance of the test. In a group with good OS were stable blood flow in the microvasculature during the test. In a group with poor OS , vascular responses were expressed. The arterio-venular blood flow increases, the intensity of capillary blood flow is reduced. Blood flow indices are decrease - PI 2.7 times, RI 1.9 times, this is the dilution of microcirculation vessels.