Glutamate and its synthetic analogues N-methyl-d-aspartate (NMDA), kainate, and alpha-amino-3-hydroxy-5-methylisoxazole-4-propionate (AMPA) are potent dilator agents in the cerebral circulation. The close linkage between neural activity-based release and actions of glutamate on neurons and the related decrease in cerebral vascular resistance is a classic example in support of the concept of tig...

The pyridazine ring is present in various biologically active compounds and some pyridazine compounds have been reported as valuable cardiovascular agents. Benzimidazole-pyridazinone compound, 4,5-dihydro-6-[2-(4-methoxyphenyl)-1H-benzimidazole-5-yl]-5-methyl-3(2H)pyridazinone (pimobedan or vetmedin) is a potent cardiovascular agent. It is a non adrenergic, non-glycoside inotropic drug with vas...

Vasodilating agents were tested on smooth-muscle strips of small arterial blood vessels of dog and rabbit skin and mesentery, and two patterns of reaction were demonstrated. The type 1 vasodilating agents, for example nicotinate, caused relaxation of contracted strips or blocked their contraction. The type 2 vasodilating compounds, histamine, choline esters, and bradykinin, either caused contra...

background: deliberate hypotension is a strategy that reduces intraoperative bleeding and increases the speed of surgery in otolaryngology procedures. magnesium (mg) sulfate is a vasodilator agent that reduces intraoperative hypnotic requirements and in combination with analgesic agents, it reduces intraoperative and postoperative pain. in this study we evaluated the use of intravenous mg sulfa...

Vasodilating agents were tested on smooth-muscle strips of small arterial blood vessels of dog and rabbit skin and mesentery, and two patterns of reaction were demonstrated. The type 1 vasodilating agents, for example nicotinate, caused relaxation of contracted strips or blocked their contraction. The type 2 vasodilating compounds, histamine, choline esters, and bradykinin, either caused contra...

There has been considerable interest in the development of novel compounds with anticonvulsant, antidepressant, analgesic, antiinflammatory, antiplatelet, antimalarial, antimicrobial, antimycobacterial, antitumoral, vasodilator, antiviral and antischistosomiasis activities. Hydrazones possessing an azometine -NHN=CH- proton constitute an important class of compounds for new drug development. Th...

Studies have been so far made on the benzodioxane derivatives as a cardiovascular drug which were reported as a peripheral vasodilator, or as a hypotensive agent by Schaper et al. (1) and Green et al. (2). 8-[(1, 4-benzodioxan-2-yl) methyl]-3-oxo-l-thia-4, 8-dia zaspiro-[4, 5]-decane maleate (Y-3506) was found desirable as a peripheral vasodilator with low toxicity among the new derivatives syn...