We studied the effect of α-adrenoreceptor agonist clonidine hydrochloride in concentrations of 10-10 M on inotropy, chronotropy, and coronary flow in Langendorff-isolated heart of adult rats. It was found that α-adrenoreceptor agonist changed all studied parameters. Left ventricular myocardium contraction force decreased after application of all tested concentrations, the maximum effect was observed at a concentration of 10 M. Stimulation of α-adrenergic receptors in concentrations of 10, 10, and 10 M produced a two-phase effect (initial increase and a subsequent decrease) on the coronary flow. Clonidine hydrochloride in the maximum concentration (10 M) caused a decrease in HR in one group and an increase in the other.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.