Document Detail


Effects of left circumflex coronary flow transducer implantation on posterior wall innervation.
MedLine Citation:
PMID:  3826398     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To determine whether dissection around a coronary artery and implantation of a flow transducer resulted in partial regional denervation of the heart, the effects of bilateral stimulation of the ansae subclaviae were evaluated on regional left ventricular (LV) wall thickening (WT) and tissue norepinephrine content in four groups of dogs following 1) sham operations (n = 6),2) implantation of a Doppler flow transducer on the left circumflex coronary artery (n = 6), 3) selective circumflex coronary artery denervation with topical phenol application (n = 5), and 4) selective denervation of the posterior LV wall by extensive surgical stripping of the left circumflex coronary artery and local application of phenol (n = 6). One week later after anesthesia (chloralose 100 mg/kg) and a second thoracotomy for implantation of ultrasonic WT crystals, stimulation of the ansae subclaviae increased posterior WT by 67 +/- 9% in the sham group, 71 +/- 14% in the flow probe group, and did not increase systolic WT in the denervated group. In the posterior LV wall, norepinephrine levels were reduced (P less than 0.01) in the denervated group (6 +/- 4 pg/mg) but not in the flow probe group (629 +/- 4 pg/mg) compared with the sham group (589 +/- 88 pg/mg). Selective left circumflex coronary artery denervation did not result in either diminished norepinephrine levels in the posterior LV wall nor diminished response of WT to sympathetic nerve stimulation. Thus chronic instrumentation applied properly to the left circumflex coronary artery does not result in significant regional denervation of the posterior myocardium.
Authors:
D R Knight; J X Thomas; W C Randall; S F Vatner
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The American journal of physiology     Volume:  252     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1987 Mar 
Date Detail:
Created Date:  1987-04-16     Completed Date:  1987-04-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  H536-9     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
Animals
Coronary Circulation*
Coronary Vessels / innervation*
Denervation
Dogs
Electric Stimulation
Myocardium / metabolism
Norepinephrine / metabolism
Regional Blood Flow
Sympathetic Nervous System / physiology
Ventricular Function
Grant Support
ID/Acronym/Agency:
HL-33065/HL/NHLBI NIH HHS; HL-33107/HL/NHLBI NIH HHS; HL-33743/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
51-41-2/Norepinephrine

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


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