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                            [content] => *! The study examines how hypoxia and reoxygenation affect the relaxation of monkey coronary arteries by comparing their response under normal conditions, low oxygen (hypoxia), and after reintroducing oxygen (reoxygenation). *! Results showed that both hypoxia and reoxygenation hindered the artery's ability to relax in response to certain medications (nitroglycerin and isosorbide dinitrate), but not others (8-bromoguanosine-3',5'-cyclic monophosphate and isoproterenol). *! Treatment with specific inhibitors, such as apocynin and oxypurinol, significantly improved this impairment, indicating that different sources of superoxide production are involved during hypoxia (from NAD
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