Document Detail


Pharmacologic antagonism of beta adrenergic blockade in dogs. II. Hemodynamic effects of simultaneous intravenous infusion of isoproterenol and dopamine during chronic propranolol administration.
MedLine Citation:
PMID:  6243164     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Chronic beta adrenergic blockade was induced in eight dogs with 240 to 360 mg of oral propranolol dailty for 2 to 6 weeks. Beta blockade was confirmed by a minimal heart rate response to isoproterenol, 0.06 micrograms/kg/min, in a pentobarbital-anesthetized, open-chest preparation. Subsequent to confirmation of beta blockade, hemodynamic effects of isoproterenol and dopamine were examined individually and in combination. A desirable balance of arterial pressure and cardiac output was achieved by combining isoproterenol, 0.2 to 2.0 micrograms/kg/min, with dopamine, 5 to 20 micrograms/kg/min. This combination increased mean arterial pressure (109 +/- 9 versus 81 +/- 7), cardiac output (4.3 +/- .5 versus 2.8 +/- .3 L/min) and heart rate 156 +/- 4 versus 120 +/- 7) (p less than 0.05). The hemodynamic effects of combined isoproterenol-dopamine were superior to the effects of either drug alone and suggest a method for effective circulatory support of man during chronic beta adrenergic blockade.
Authors:
H M Spotnitz; G J Avery; E A Rose; A I Benvenisty; J R Malm; B F Hoffman
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of thoracic and cardiovascular surgery     Volume:  79     ISSN:  0022-5223     ISO Abbreviation:  J. Thorac. Cardiovasc. Surg.     Publication Date:  1980 Jan 
Date Detail:
Created Date:  1980-02-26     Completed Date:  1980-02-26     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0376343     Medline TA:  J Thorac Cardiovasc Surg     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  103-8     Citation Subset:  AIM; IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Blood Pressure / drug effects
Cardiac Output / drug effects
Dogs
Dopamine / pharmacology*
Drug Therapy, Combination
Heart Rate / drug effects
Hemodynamics / drug effects*
Isoproterenol / pharmacology*
Propranolol / pharmacology*
Receptors, Adrenergic, beta / drug effects
Chemical
Reg. No./Substance:
0/Receptors, Adrenergic, beta; 525-66-6/Propranolol; 7683-59-2/Isoproterenol

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


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