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Effect of Angiotensin-Converting Enzyme Inhibitors on Myocardial Perfusion

Conference paper

Abstract

Inhibition of the angiotensin I-converting enzyme (ACE) results in diminished production of angiotensin II which is the active vasoconstrictor peptide of the renin- angiotensin system. The effect of ACE inhibitors is, however, complex. Apart from their interference with the plasmatic or vascular renin-angiotensin system, they may affect the central [5] and, in particular, the sympathetic nervous system [3, 34] as well as the kallikrein-kinin system [28] and prostaglandins [43]. Finally, angiotensin II acts in a directly positively inotropic way [32], increases vascular permeability [26], and may attract neutrophils [15, 21]. Some converting enzyme inhibitors have been claimed to have free radical scavenger potency as do other drugs possessing an (SH) sulfhydryl-group [37]. Thus, there are multiple ways how ACE inhibitors may influence the heart and coronary circulation. Coronary circulation, however, is a peculiar topic for the pharmacologist since it is influenced by many factors including metabolic demand of the heart and mechanical compression of the coronary vasculature by cardiac contraction.

Keywords

Myocardial Perfusion Myocardial Ischemia Plasma Renin Activity Coronary Blood Flow Coronary Stenosis 
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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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • G. Ertl
    • 1
  1. 1.Medizinische KlinikJulius-Maximilians-UniversitätWürzburgGermany

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