Document Detail

Lack of beta-adrenergic activity of isoflurane in the dog: a comparison of circulatory effects of halothane and isoflurane after propranolol administration.
MedLine Citation:
PMID:  14656     Owner:  NLM     Status:  MEDLINE    
The studies were undertaken to determine whether isoflurance inhalation is associated with a degree of beta-adrenergic action that is potentially important in clinical situations, and to compare the circulatory tolerance to isoflurane and halothane in dogs following beta blockade. We measured arterial and pulmonary artery pressure, left and right ventricular filling pressure, heart rate and cardiac output, and derived stroke volume and systemic and pulmonary vascular resistances in 13 mongrel dogs. The haemodynamic response to 1 MAC and 2 MAC isoflurane was studied in seven dogs and was similar before and after propranolol 0.1mg/kg i.v. In six dogs, propranolol 0.5mg/kg caused no significant changes in the circulatory response to 1 MAC and 2 MAC isoflurane or 1 MAC halothane. However, in three dogs, administration of 2 MAC halothane after propranolol 0.5mg/kg resulted in such profound circulatory depression as to preclude further study. These data suggest that (a) isoflurane possesses no clinically important beta-adrenergic stimulating activity; (b) there is no adverse drug interaction upon the circulation with the combination of isoflurane and propranolol; (c) in the presence of moderated profound beta-adrenergic blockade, 2 MAC isoflurane may be tolerated better than 2 MAC halothane.
D M Philbin; E Lowenstein
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  British journal of anaesthesia     Volume:  48     ISSN:  0007-0912     ISO Abbreviation:  Br J Anaesth     Publication Date:  1976 Dec 
Date Detail:
Created Date:  1977-05-27     Completed Date:  1977-05-27     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372541     Medline TA:  Br J Anaesth     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1165-70     Citation Subset:  IM    
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MeSH Terms
Adrenergic beta-Agonists / pharmacology
Blood Circulation / drug effects*
Drug Tolerance
Halothane / pharmacology*
Isoflurane / pharmacology*
Methyl Ethers / pharmacology*
Propranolol / pharmacology*
Receptors, Adrenergic / drug effects*
Receptors, Adrenergic, beta / drug effects*
Reg. No./Substance:
0/Adrenergic beta-Agonists; 0/Methyl Ethers; 0/Receptors, Adrenergic; 0/Receptors, Adrenergic, beta; 151-67-7/Halothane; 26675-46-7/Isoflurane; 525-66-6/Propranolol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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