Document Detail


Changes in regional vascular resistance in canine aortic coarctation.
MedLine Citation:
PMID:  6400379     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Aortic coarctation was created experimentally in dogs and regional blood flows were measured at various times thereafter with radioactive microspheres in the conscious state. Mean arterial pressure increased moderately proximal to the stenosis, whereas distally it was reduced below control immediately, returning progressively toward control over 28 days. Blood flows were compared in tissues that are found both proximally and distally (skeletal muscles, skin and bones). In several groups of muscles located in the anterior part of the body, vascular conductance increased during the first hours after coarctation, then decreased below control. A similar pattern was observed in muscles of the hind leg. In the skin and in the bones of the front leg and of the hind leg, vascular conductance also increased in the early stages and decreased during the late stages. It therefore appears that aortic coarctation in dogs is characterized by a late generalized decrease in vascular conductance that extends to tissues which are never exposed to increased arterial pressure. These findings suggest that a systemic vasoconstrictor influence (possibly the measured increase in plasma renin activity) overrides local mechanisms in the control of regional circulations.
Authors:
J F Liard; J C Spadone
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of hypertension. Supplement : official journal of the International Society of Hypertension     Volume:  2     ISSN:  0952-1178     ISO Abbreviation:  J Hypertens Suppl     Publication Date:  1984 Dec 
Date Detail:
Created Date:  1986-06-25     Completed Date:  1986-06-25     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8501422     Medline TA:  J Hypertens Suppl     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  S375-7     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Aortic Coarctation / physiopathology*
Dogs
Hemodynamics
Male
Microspheres
Regional Blood Flow
Renin / blood
Time Factors
Vascular Resistance*
Grant Support
ID/Acronym/Agency:
HL 29587-01/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
EC 3.4.23.15/Renin

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


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