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Free radicals and myocardial injury: pharmacologic implications.

A GROWING NUMBER of articles purport to demonstrate the importance of oxygen free radicals in a variety of pathophysiologic processes, including injury due to radiation, inflammation, and oxygen toxicity. The purpose of this essay is to examine the hypothesis that activated oxygen species may play a role in the extension of myocardial injury due to ischemia followed by reperfusion. Activated oxygen species include-superoxide anion, hydrogen peroxide, and hydroxyl radical. By virtue of