The Survival of Excitability, Energy Production and Energy Utilization of the Heart

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Abstract
The resistance of the whole heart to complete ischemia is greater than that of heart muscle slices. There is a great variability in the survival time of the respiratory enzymes and co-enzymes. Cardiac excitability is vulnerable to anoxia as illustrated by rapid changes in the membrane resting and action potential. The alterations may be closely related to changes in high-energy phosphate concentration. Energy utilization in heart muscle is quite resistant to anoxia. The chemical changes in heart muscle after death are discussed.