Document Detail

Effects of nitroglycerin-induced hypotension on myocardial blood flow in a two vessel occlusion-stenosis anesthetized canine model.
MedLine Citation:
PMID:  3928728     Owner:  NLM     Status:  MEDLINE    
The effects of acute occlusion of the left anterior descending coronary artery on regional blood flow (microspheres) to the remote bed supplied by either an unstenosed or a stenosed circumflex coronary artery were assessed during the infusion of intravenous nitroglycerin in 11 open chest barbiturate-anesthetized mongrel dogs. Left anterior descending coronary artery occlusion in the presence of an unstenosed left circumflex artery during nitroglycerin infusion caused systolic aortic and distal circumflex pressure to decrease significantly from 98 +/- 4 to 91 +/- 3 and from 99 +/- 4 to 92 +/- 3 mm Hg, respectively. Remote circumflex bed flow was unchanged. The infusion of intravenous nitroglycerin in the presence of a left circumflex stenosis (gradient 31 +/- 3 mm Hg) reduced systolic aortic and distal circumflex pressure to 98 +/- 2 (p = 0.001) and 71 +/- 4 mm Hg (p = 0.001), respectively, and lowered remote circumflex bed endocardial flow from 1.00 +/- 0.08 to 0.79 +/- 0.07 ml/min per g (p = 0.001). When the left anterior descending coronary artery was occluded under these conditions, systolic aortic and distal left circumflex pressure decreased to 89 +/- 3 (p = 0.005) and 62 +/- 4 mm Hg (p = 0.08), respectively. Remote circumflex artery bed endocardial and transmural flow were significantly reduced to 0.58 +/- 0.07 (p = 0.01) and 0.65 +/- 0.07 ml/min per g (p = 0.03), respectively.(ABSTRACT TRUNCATED AT 250 WORDS)
J A Gascho; M S Mahanes; T L Flanagan; G A Beller
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of the American College of Cardiology     Volume:  6     ISSN:  0735-1097     ISO Abbreviation:  J. Am. Coll. Cardiol.     Publication Date:  1985 Oct 
Date Detail:
Created Date:  1985-10-24     Completed Date:  1985-10-24     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8301365     Medline TA:  J Am Coll Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  856-63     Citation Subset:  AIM; IM    
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MeSH Terms
Coronary Circulation / drug effects*
Coronary Disease / drug therapy,  physiopathology*
Coronary Vessels / physiology
Hypotension / chemically induced,  physiopathology*
Models, Biological
Myocardial Infarction / drug therapy
Nitroglycerin / therapeutic use*
Grant Support
Reg. No./Substance:

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

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