Fiziologicheskiĭ zhurnal SSSR imeni I. M. Sechenova
-
Fiziol Zh SSSR Im I M Sechenova · Jun 1991
[Microvascular reactivity and transcapillary fluid exchange in the lungs].
In anesthetized cats and rabbits responses of terminal pulmonary vessels to alveolar hypoxia, noradrenaline, histamin, acetylcholine and serotonine, were studied. The role of the vascular bed tone in regulation of pulmonary filtration-absorption function, was studied. ⋯ Their contribution to hemodynamic shifts in microcirculation was insignificant. Pulmonary vasomotor responses cannot be a reason for considerable extravascular accumulation of fluid in the lungs at a normal hydraulic permeability of alveolar-capillary membrane.
-
Fiziol Zh SSSR Im I M Sechenova · May 1991
[The effect of local electrostimulation of nerve tissue on its blood supply indices in extreme brain states].
The specifics of local blood flow (LBF) was studied in the areas of electrical stimulation. The occurring changes are determined primarily by the functional state of neural tissue in the stimulation area as well as in the whole brain. The cortex develops an insrement of the LBF after stimulation by the 4th-5th day whereas no such tendency was found in the white matter.
-
Fiziol Zh SSSR Im I M Sechenova · Apr 1991
[Changes in the systemic and regional hemodynamics, hydration and engorgement of the lungs during occlusion of the thoracic aorta].
The occlusion of the rat aorta's thoracic portion induces within 30 min hemodynamic shifts in major and minor circulation typical for a hypertensive incident. The occurring 4-5-fold increase of the lung venous pressure leads to no regular lung oedema and is of no major importance for its pathogenesis.
-
Fiziol Zh SSSR Im I M Sechenova · Nov 1989
Review[The neurogenic mechanism of the regulation of cerebral circulation and the linking of blood flow-metabolism function].
The neurogenic link of the CBF regulation provides the "microflow-metabolism-function" coupling by means of external innervation of the brain vessels. According to the principle of regulation through input, the latter can be the level of emotional tension (excitement) and not the current metabolic demands. The neurogenic link cannot be the mechanism of the CBF local self-regulation. The regulation of adequate blood supply of the brain for maintenance of the "function-metabolism-microflow" coupling is carried out by metabolic link of regulatory system.
-
Fiziol Zh SSSR Im I M Sechenova · Aug 1989
Comparative Study[The interrelations of arterial pressure, cardiac output and coronary blood flow during orthostatic reactions].
The influence of hypotension induced with orthostasis, upon cardiac output and coronary flow was studied in anesthetized cats. The body tilt to 15-60 degrees lowered the mean arterial pressure parallel with reduction of cardiac output. Under the tilt up to 30 degrees and 60 degrees, a significant difference was found in decrease of systolic but not diastolic pressures. ⋯ The findings suggest a participation of vascular constrictor responses in the forming of orthostatic reactions. The coronary flow decrease only began with the tilt up to 30 degrees. Its extent did not depend on the intensity of hypotension being, probably, the result of the reduction of the heart work.