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ATP (the upper panel) and creatine phosphate (CP) contents (the lower panel) of perfused hearts untreated or treated 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 untreated group (0 μM propranolol; P<0.05). #Significantly different from the normoxic heart of the untreated ischaemic/reperfused group (P<0.05).
