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Mitochondrial oxygen consumption rate of the left ventricular skinned bundles prepared from perfused hearts untreated (0 μM) or pretreated with 10, 30, or 100 μM propranolol at the ends of pre-ischaemia, ischaemia, and reperfusion, respectively. Each value represents the mean±s.e.mean of five experiments. #Significantly different from the corresponding untreated ischaemic or ischaemic/reperfused group (P<0.05). *Significantly different from the untreated group (P<0.05).
