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We demonstrated a dose-dependent inhibitory effect of novel imidazobenzoimidazole derivatives RU-353 and RU-563 on cerebral blood flow and systemic blood pressure in narcotized rats. The effects of RU-353 increased, while the effect of RU-563 decreased with increasing the dose.
Tetrindole (a tetracyclic antidepressant, reversible MAO inhibitor of the A type) and desipramine (a tricyclic antidepressant, nonselective inhibitor of the reverse catecholamine trapping) produce opposite hemodynamic effects in stroke-prone hypertensive rats (SHR-SP): tetrindole reduced, whereas desipramine increased, the heart rate and arterial pressure.… (More)
Bradysole (1 mg/kg intravenously) induced a moderate increase in cerebral bloodflow and a minor decrease in systemic blood pressure in narcotized rats. These effects were less pronounced compared to the effects of dibasole (bradysole structural analog) in the same dose.
The effect of cavinton (vinpocetine) on the systemic and regional hemodynamic parameters was studied by the radioactive microsphere technique in experiments on conscious and anesthetized rats. Intravenous administration of cavinton (10 mg/kg) was followed by the development of hypotension and bradycardia in conscious and anesthetized animals. Administration… (More)
In anesthetized cats, comparative characteristics of hemodynamics and biochemical indications of postischemic period in respect to autohemoperfusion with stable blood volume and perfusion pressure, were determined. Cerebral ischemia was caused by the 15-min stop of the perfusing pump or flowmeter and a decrease of systemic arterial blood pressure to 40 ml… (More)
Changes in systemic and regional hemodynamic during sound-induced convulsions were measured with microsphere technique in genetically epilepsy-prone rats of Krushinsky-Molodkina (KM-rats) strain. Blood pressure increased from 103 till 178 mm Hg and cardiac index rose from 27.3 till 49.3 ml/min/100 g b. w. during convulsions. Blood flow was increased in the… (More)
1-min forceful immersion in water increased mean arterial pressure by 24% in Ondatra, decreased their heart rate by 71% and cardiac output by 36% Respective figures in Wistar rats were as follows: 19%, 62%, and 46% decrease. By the 50th sec of immersion cerebral blood flow increased 13-fold in Ondatra and 6-fold in Wistar rats.
Single intravenous injection of antidepressant tetrindol (1 and 10 mg/kg), a reversible monoamine oxidase A inhibitor, dose-dependently decreased heart rate and mean arterial pressure (in a concentration of 10 mg/kg) in alert NMRI mice and Sprague-Dawley rats. Nitric oxide synthase blockade with L-NAME attenuated tetrindol-induced bradycardia in rats and… (More)
In acute experiments on anesthetized cats with cerebral ischemia in conditions of autohemoperfusion of cerebral and peripheral vessels with a stable volume of blood we found that lithium oxybutirate and new GABA derivatives: LOS 1-84 and LOS 5-79 affect the cerebral blood flow and metabolism in the brain. Prophylactic intravenous injection of lithium… (More)
Resistography was applied in acute cat experiments to study the effects of GABA and piracetam on the neurogenic pressor vascular reactions of cerebral and hind limb vessels, induced by stimulation of bulbar structures (locus coeruleus field), of the cervical sympathetic and tibial nerves. GABA (50 mg/kg) and piracetam (100 mg/kg) reduced the central and… (More)