Document Detail

Lactate release during the recovery period of pacing-induced angina in assessment of myocardial ischaemia.
MedLine Citation:
PMID:  3956525     Owner:  NLM     Status:  MEDLINE    
Myocardial lactate (L) metabolism was tested in 27 stable angina patients during atrial pacing (AP) and in the recovery period (R) from AP-induced angina pectoris. The recovery period was assessed in order to evaluate the changes in the rate of L release and detect possible relationships with the severity of ischaemic damage. The following variables were assessed: coronary sinus blood flow (CSBF), left ventricular end-diastolic pressure (LVEDP), lactate extraction ratio (L%), lactate extraction or release rate (LR) and myocardial oxygen consumption (MVO2) at the onset of AP (AP1), during angina (AP2), and 30 s, 2 and 4 min (R1, R2 and R3) after AP ceased. At Ap2, negative L% and LR values (-39.37 +/- 43.3, -3.2 +/- 2.9) were found, in spite of a rise in CSBF (+86%, P less than 0.001). Furthermore, LVEDP showed its maximal increase in AP2 (+27%, P less than 0.001). Compared to AP2, L% resulted unchanged in R1, while LR showed a mild decrease (from -3.2 +/- 2.9 to +2.06 +/- 2.93). Lactate production was converted to extraction in R3 only. Since lactate production and release are progressively reduced with increasing severity of ischaemic damage, AP2 coronary sinus lactate release should largely arise from the less damaged areas (i.e. the outer myocardial layers) and the contribution of the more damaged areas (i.e. the inner myocardial layers) should be more limited. After AP ceases, the mild ischaemic areas should recover more rapidly than the severely ischaemic areas, where the damage only declines, leading to a temporary increase in lactate production and release.(ABSTRACT TRUNCATED AT 250 WORDS)
F Cuccurullo; A Mezzetti; V Tomassetti; E Porreca; M D Guglielmi; M Pasquale; D Lapenna; L Marzio; G Poggiopollini; S Lenzi
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  European heart journal     Volume:  7     ISSN:  0195-668X     ISO Abbreviation:  Eur. Heart J.     Publication Date:  1986 Jan 
Date Detail:
Created Date:  1986-05-22     Completed Date:  1986-05-22     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8006263     Medline TA:  Eur Heart J     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  77-85     Citation Subset:  IM    
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MeSH Terms
Angina Pectoris / blood*
Cardiac Pacing, Artificial*
Coronary Disease / blood*
Lactates / blood*
Lactic Acid
Middle Aged
Myocardium / metabolism
Oxygen Consumption
Reg. No./Substance:
0/Lactates; 50-21-5/Lactic Acid

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

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