Biomaterial Database

Haemodynamic effects of Ro 13-6438, a new inotropic agent with vasodilating properties. 1986

S Braun, and B Shargorodsky, and U Talit, and S Laniado

The chemical class 1,5 dihydroimidazo (2,1-6) guinazolin-2(3H)ones has been shown to have positive inotropic activity, some of its members displaying a favourable ratio between positive inotropic and chronotropic activity. This study was designed to determine the cardiovascular properties of Ro 13-6483, a non-glycoside, non-catechol positive inotropic agent, in anaesthetized, open chest mongrel dogs. Ro 13-6483 (1 mg/kg) was administered intravenously over a 5-min period to 6 dogs. Haemodynamic changes were measured continuously over a period of 45 min. Ro 13-6438 increased stroke volume by 61.9% (p less than 0.001) and cardiac output by 53.3% (p less than 0.001). Systolic and diastolic blood pressure decreased significantly (p less than 0.01). Heart rate did not change. The lowering of the blood pressure, without a significant increase in heart rate, observed after Ro 13-6483 administration might prove to be of value in patients with congestive heart failure, since Ro 13-6483 would reduce afterload and improve the competency of the heart, in addition to the positive inotropic effects.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D009200	Myocardial Contraction	Contractile activity of the MYOCARDIUM.	Heart Contractility,Inotropism, Cardiac,Cardiac Inotropism,Cardiac Inotropisms,Contractilities, Heart,Contractility, Heart,Contraction, Myocardial,Contractions, Myocardial,Heart Contractilities,Inotropisms, Cardiac,Myocardial Contractions
D011799	Quinazolines	A group of aromatic heterocyclic compounds that contain a bicyclic structure with two fused six-membered aromatic rings, a benzene ring and a pyrimidine ring.	Quinazoline
D004285	Dogs	The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)	Canis familiaris,Dog
D004353	Drug Evaluation, Preclinical	Preclinical testing of drugs in experimental animals or in vitro for their biological and toxic effects and potential clinical applications.	Drug Screening,Evaluation Studies, Drug, Pre-Clinical,Drug Evaluation Studies, Preclinical,Drug Evaluations, Preclinical,Evaluation Studies, Drug, Preclinical,Evaluation, Preclinical Drug,Evaluations, Preclinical Drug,Medicinal Plants Testing, Preclinical,Preclinical Drug Evaluation,Preclinical Drug Evaluations,Drug Screenings,Screening, Drug,Screenings, Drug
D005260	Female		Females
D006439	Hemodynamics	The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.	Hemodynamic
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013268	Stimulation, Chemical	The increase in a measurable parameter of a PHYSIOLOGICAL PROCESS, including cellular, microbial, and plant; immunological, cardiovascular, respiratory, reproductive, urinary, digestive, neural, musculoskeletal, ocular, and skin physiological processes; or METABOLIC PROCESS, including enzymatic and other pharmacological processes, by a drug or other chemical.	Chemical Stimulation,Chemical Stimulations,Stimulations, Chemical
D014665	Vasodilator Agents	Drugs used to cause dilation of the blood vessels.	Vasoactive Antagonists,Vasodilator,Vasodilator Agent,Vasodilator Drug,Vasorelaxant,Vasodilator Drugs,Vasodilators,Vasorelaxants,Agent, Vasodilator,Agents, Vasodilator,Antagonists, Vasoactive,Drug, Vasodilator,Drugs, Vasodilator