Biomaterial Database

Effect of ketamine on contractile performance of isolated frog myocardium and comparison of ketamine, thiopental and droperidol. 1992

L Akbaş, and Y Sarioğlu, and T Utkan

Department of Pharmacology, Cumhuriyet University, Faculty of Medicine, Sivas, Turkey.

The influence of ketamine on the inotropic and chronotropic responsiveness of heart muscle was examined in spontaneously beating frog ventricular preparations. Ketamine produced a slight positive inotropic effect in isolated strips from the ventricle of the frog at 10(-5) M concentration. It does, however, possess negative inotropic properties at the higher doses studied (> or = 10(-4) M). Ketamine also decreased the heart rate of the ventricle at doses greater than 10(-4) M. Prior muscarinic blockade with atropine (10(-6) M) and histaminergic- H2 blockade with cimetidine (10(-5) M), did not affect the negative inotropic action of ketamine. Thiopental and droperidol also depressed the contractile performance of the frog myocardium. pD2 values of ketamine, thiopental and droperidol were found to be 3.44 +/- 0.63, 3.36 +/- 0.74, 4.18 +/- 0.45 respectively. These results suggest that the negative inotropic effects of ketamine is evident only at high concentrations and appears to be non specific.

UI	MeSH Term	Description	Entries
D007649	Ketamine	A cyclohexanone derivative used for induction of anesthesia. Its mechanism of action is not well understood, but ketamine can block NMDA receptors (RECEPTORS, N-METHYL-D-ASPARTATE) and may interact with sigma receptors.	2-(2-Chlorophenyl)-2-(methylamino)cyclohexanone,CI-581,Calipsol,Calypsol,Kalipsol,Ketalar,Ketamine Hydrochloride,Ketanest,Ketaset,CI 581,CI581
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
D011898	Ranidae	The family of true frogs of the order Anura. The family occurs worldwide except in Antarctica.	Frogs, True,Rana,Frog, True,True Frog,True Frogs
D003864	Depression, Chemical	The decrease 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 Depression,Chemical Depressions,Depressions, Chemical
D004329	Droperidol	A butyrophenone with general properties similar to those of HALOPERIDOL. It is used in conjunction with an opioid analgesic such as FENTANYL to maintain the patient in a calm state of neuroleptanalgesia with indifference to surroundings but still able to cooperate with the surgeon. It is also used as a premedicant, as an antiemetic, and for the control of agitation in acute psychoses. (From Martindale, The Extra Pharmacopoeia, 29th ed, p593)	Dehydrobenzperidol,Dehidrobenzperidol,Droleptan,Inapsine
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
D013874	Thiopental	A barbiturate that is administered intravenously for the induction of general anesthesia or for the production of complete anesthesia of short duration.	Penthiobarbital,Thiomebumal,Thiopentobarbital,Bomathal,Nesdonal,Pentothal,Pentothal Sodico,Sodipental,Thionembutal,Thiopental Nycomed,Thiopental Sodium,Thiopentone,Tiobarbital Braun,Trapanal
D066298	In Vitro Techniques	Methods to study reactions or processes taking place in an artificial environment outside the living organism.	In Vitro Test,In Vitro Testing,In Vitro Tests,In Vitro as Topic,In Vitro,In Vitro Technique,In Vitro Testings,Technique, In Vitro,Techniques, In Vitro,Test, In Vitro,Testing, In Vitro,Testings, In Vitro,Tests, In Vitro,Vitro Testing, In