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Effects of 1 μM raloxifene on action potential duration. (a) Sample recording of the membrane potential during steady–state stimulation at 1 Hz in normal Tyrode (NT) and in the presence of 1 μM Raloxifene (1 Ral). (b) Bar graphs showing significantly shortened times-to-50% and 90% repolarisation of the membrane (APD50 and APD90, respectively) in the presence of raloxifene (n=27, *P<0.05, **P<0.01).
