Biomaterial Database

Comparison of ejection fraction and segmental circumferential fiber shortening velocity in the anesthetized and conscious canine. 1979

M M Laks, and L Greenless, and D Garner

A chronically and transseptally implanted left atrial catheter was utilized to perform repeated cineangiography in the conscious dog. The advantage of this preparation is that catheter placement does not require a thoracotomy. Left ventricular function was compared in the same pentobarbital-anesthetized and conscious dog. Anesthesia significantly depressed myocardial function as was demonstrated by a decrease in ejection fraction and segmental circumferential fiber shortening velocity (VCF) and an increase in end-diastolic volume. In addition, no difference in Vcf occurred between the base and the apex. Since anesthesia produced regional difference in the degree of depression of VCF, we conclude that anesthesia will produce patterns of ventricular contraction which are variable and unpredictable. Consequently, we recommend the use of the conscious dog and this preparation in order to evaluate myocardial function.

UI	MeSH Term	Description	Entries
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
D010424	Pentobarbital	A short-acting barbiturate that is effective as a sedative and hypnotic (but not as an anti-anxiety) agent and is usually given orally. It is prescribed more frequently for sleep induction than for sedation but, like similar agents, may lose its effectiveness by the second week of continued administration. (From AMA Drug Evaluations Annual, 1994, p236)	Mebubarbital,Mebumal,Diabutal,Etaminal,Ethaminal,Nembutal,Pentobarbital Sodium,Pentobarbital, Monosodium Salt,Pentobarbitone,Sagatal,Monosodium Salt Pentobarbital
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
D006321	Heart	The hollow, muscular organ that maintains the circulation of the blood.	Hearts
D006328	Cardiac Catheterization	Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.	Catheterization, Cardiac,Catheterization, Heart,Heart Catheterization,Cardiac Catheterizations,Catheterizations, Cardiac,Catheterizations, Heart,Heart Catheterizations
D006439	Hemodynamics	The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.	Hemodynamic
D000777	Anesthetics	Agents capable of inducing a total or partial loss of sensation, especially tactile sensation and pain. They may act to induce general ANESTHESIA, in which an unconscious state is achieved, or may act locally to induce numbness or lack of sensation at a targeted site.	Anesthetic,Anesthetic Agents,Anesthetic Drugs,Anesthetic Effect,Anesthetic Effects,Agents, Anesthetic,Drugs, Anesthetic,Effect, Anesthetic,Effects, Anesthetic
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