Document Detail


Coronary vasodilation caused by intravenous cocaine in the anesthetized beagle.
MedLine Citation:
PMID:  2383802     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The aim of this study was to determine the effect of intravenous cocaine on the coronary circulation in the dog. Sixteen beagles separated into three groups were administered either cocaine (n = 8) or lidocaine (n = 4) at doses of 0.4, 2.0, and 10.0 mg/kg under conditions of constant coronary blood flow. A third group of beagles (n = 4) was administered cocaine under conditions of natural coronary blood flow. In the first group, the lowest dose of cocaine had no significant effect on coronary perfusion pressure, even though it increased mean systemic arterial pressure by 10% (p less than 0.05). The second two doses decreased coronary perfusion pressure by 13 (p less than 0.05) and 68% (p less than 0.05), respectively. In the second group, the lowest dose of lidocaine did not significantly affect coronary perfusion pressure. However, the second two doses significantly decreased coronary perfusion pressure by 22 (p less than 0.05) and 45% (p less than 0.05), respectively. Under conditions of natural coronary blood flow and coronary perfusion pressure, these same doses of cocaine increased coronary blood flow by 25, 63, and 175%, respectively. All coronary vascular responses occurred 60 s after administration of cocaine or lidocaine. We conclude that cocaine causes rapid, dose-dependent coronary vasodilation in the anesthetized beagle. The coronary vasodilation appears to be related to cocaine's known, local anesthetic properties.
Authors:
G S Friedrichs; H M Wei; G F Merrill
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Canadian journal of physiology and pharmacology     Volume:  68     ISSN:  0008-4212     ISO Abbreviation:  Can. J. Physiol. Pharmacol.     Publication Date:  1990 Jul 
Date Detail:
Created Date:  1990-09-20     Completed Date:  1990-09-20     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0372712     Medline TA:  Can J Physiol Pharmacol     Country:  CANADA    
Other Details:
Languages:  eng     Pagination:  893-7     Citation Subset:  IM    
Affiliation:
Graduate Program in Physiology and Neurobiology, Rutgers University, New Brunswick, NJ 08903.
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MeSH Terms
Descriptor/Qualifier:
Anesthesia
Animals
Cocaine / administration & dosage,  pharmacology*
Coronary Circulation / drug effects*
Dogs
Dose-Response Relationship, Drug
Electrocardiography
Female
Hemodynamics / drug effects
Injections, Intravenous
Lidocaine / pharmacology
Male
Vasodilation / drug effects*
Chemical
Reg. No./Substance:
137-58-6/Lidocaine; 50-36-2/Cocaine

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


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