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Coronary Collateral Circulation in Acute and Chronic Myocardial Ischemia

  • Bernd Winkler
  • Thomas Schmidt
  • Wolfgang Schaper

Abstract

We have recently demonstrated in different animal species that myocardial infarct (MI) size depends mainly on the amount of acute coronary collateral blood flow and time of occlusion (TOC) [1]. In these experiments, myocardial infarction was produced by occlusion of a branch of the left anterior descending artery (LAD). Coronary blood flow was measured by the tracer microsphere technique. The amount of infarcted tissue was determined histochemically by negative pNBT staining and related to the size of the myocardium which was supplied by the occluded coronary vessel. Animals with very low acute residual blood flow develop myocardial infarction rapidly and to a larger extent (rats, rabbits, and pigs) than animals with a noticeable acute collateral blood flow (cats and dogs). No myocardial infarction could be detected in guniea pigs even after an occlusion of 24 h. These results are summarized in Table 1 and Fig. 1. In Table 1, the imbalance between blood flow in the occluded myocardial tissue and tissue perfused by normal coronary arteries is expressed as the supply/ demand ratio (SDR).

Keywords

Infarct Size Left Anterior Descend Myocardial Blood Flow Coronary Flow Reserve Coronary Blood Flow 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Winkler B, Sass S, Binz K, Schaper W (1986) Myokardiale Durchblutung und Myokardinfarkt in Ratten, Meerschweinchen, Kaninchen und Katzen. In: Burger OK, Grosdanoff P, Henschler D, Kraupp O, Schnieders B (eds) Aktuelle Probleme der Biomedizin. Gruyter, Berlin, pp 27–34Google Scholar
  2. 2.
    Schaper W (1979) (ed) The pathophysiology of myocardial perfusion. Elsevier/North-Holland, AmsterdamGoogle Scholar

Copyright information

© Springer-Verlag Tokyo 1988

Authors and Affiliations

  • Bernd Winkler
  • Thomas Schmidt
  • Wolfgang Schaper
    • 1
  1. 1.Department of Experimental CardiologyMax-Planck InstituteBad NauheimFederal Republic of Germany

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