PubMed Health⌕ Search

Biomedical subjects

L S Ivanov

Publications and source records attributed to L S Ivanov.

8 recordsLinked to original sources
PubMed1992

[The reactivity of the skeletal muscle arterioles of rats to noradrenaline after whole-body gamma irradiation at a dose of 1 Gy].

Male Wistar rats were exposed by total gamma-irradiation at 1 Gy, Reactions of skeletal muscle arterioles and mean arterial pressure on intravenous doses of noradrenaline (0.1, 0.3, 1.0 and 3.0 micrograms/kg) was studied by intravital microscopy in acute experiments 1, 3 and 5-6 days after irradiation. The exposure causes arterial hypotension on day 1 after that as well as marked reduction of spontaneous arteriole vasomotions and decrease of arteriole constrictions at any doses and dates under study. There are no differences of arterial pressure reaction amplitudes in per cent between control and exposed animals at any doses and dates under investigation.

Animals↗
PubMed1976

[Modeling microcirculatory disorders using an ultraviolet laser].

Reactions of microvessels and mast cells to laser irradiation were studied in rat mesentery by applying the method of intravital microscopy. An ultra-violet laser (gamma=337 nm) was used. The diameter of the laser beam was changed from 2 to 100 mum. Different irradiation doses provoked either an increase of vascular permeability or thrombus formation or hemorrhage. Apart from the vascular wall injury, factors accompanying the damage of red blood cells and other cells of the blood may play a role in the process of thrombus formation. Changes of the vascular diameter and permeability after laser irradiation of mast cells are probably connected with the release of histamine and serotonin contained in them.

Animals↗