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• n  any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland

• We know that when catecholamine levels are high, there tends to be more platelet aggregation, which makes a heart attack more likely.
• We know that when catecholamine levels are high, there tends to be more platelet aggregation, which makes a heart attack more likely.