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Local Myocardial Biochemical and Ionic Alterations During Myocardial Ischaemia and Reperfusion

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Summary

Acute myocardial ischaemia and reperfusion result in a series of inhomogeneous metabolic, ionic and neurohumoral events that explain the associated mechanical and electrical events, including cardiac death. The time course of the hydrolysis of high energy phosphates, the rise in extracellular potassium and the fall in intracellular and extracellular pH induced by acute no-flow ischaemia have been well characterised. However, the time course of the changes in intracellular sodium, calcium and magnesium levels is less clear. It appears that the changes in intracellular calcium may be pivotal to many of the biochemical and electrophysiological changes produced by the abrupt cessation of coronary arterial inflow and the associated interruption of venous washout. Consequently, agents that modify the handling of calcium by the sarcolemma and the sarcoplasmic reticulum have a significant impact on many of the metabolic, ionic and electrical abnormalities characterising acute ischaemia and reperfusion.

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Authors and Affiliations

  1. Division of Cardiology, Department of Medicine, The University of North Carolina at Chapel Hill, CB 7075 Burnett-Womack Building, Chapel Hill, North Carolina, 27599-7075, USA

    Leonard S. Gettes, Wayne E. Cascio, Timothy Johnson & William F. Fleet

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  1. Leonard S. Gettes
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  2. Wayne E. Cascio
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  3. Timothy Johnson
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  4. William F. Fleet
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Gettes, L.S., Cascio, W.E., Johnson, T. et al. Local Myocardial Biochemical and Ionic Alterations During Myocardial Ischaemia and Reperfusion. Drugs 42 (Suppl 1), 7–13 (1991). https://doi.org/10.2165/00003495-199100421-00004

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