Document Detail


Phosphocreatine and adenine nucleotides in postasphyxial hearts with normal basal function and normal oxygen demand.
MedLine Citation:
PMID:  3663024     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We investigated whether there is a relationship between the prolonged dysfunction after myocardial ischaemia and the postischaemic phosphocreatine overshoot phenomenon. In 16 open-chest rats 3 periods of 4 minutes of oxygen deficiency were performed and basal haemodynamic variables and the myocardial oxygen demand were determined during the recovery period. At the end of the 20 minutes recovery period, left ventricular pressure, dp/dtmax, ejection fraction, and myocardial oxygen demand were completely recovered. High energy phosphate levels, however, were still altered. The sum of adeninenucleotides was decreased to 78 +/- 4% of control (mean +/- SEM, p less than 0.05). The level of phosphocreatine was markedly elevated to 162 +/- 14 (mean +/- SEM). The persistence of the phosphocreatine overshoot phenomenon, while basal function was already normalized, indicates that a reduced function and thus a reduced energy demand of the contractile apparatus are not the cause of the phosphocreatine overshoot. We found no close relationship between high energy levels and basal function or oxygen demand in myocardium after mild oxygen deficiency.
Authors:
H M Hoffmeister; G Stein; R Storf; L Seipel
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Basic research in cardiology     Volume:  82 Suppl 2     ISSN:  0300-8428     ISO Abbreviation:  Basic Res. Cardiol.     Publication Date:  1987  
Date Detail:
Created Date:  1987-11-19     Completed Date:  1987-11-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0360342     Medline TA:  Basic Res Cardiol     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  311-6     Citation Subset:  IM    
Affiliation:
Medizinische Klinik III, Universität Tübingen, F.R.G.
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MeSH Terms
Descriptor/Qualifier:
Adenine Nucleotides / metabolism*
Animals
Anoxia / metabolism*
Coronary Disease / metabolism*
Kinetics
Male
Myocardium / metabolism*
Phosphocreatine / metabolism*
Rats
Rats, Inbred Strains
Chemical
Reg. No./Substance:
0/Adenine Nucleotides; 67-07-2/Phosphocreatine

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


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