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The effects of vehicle and five doses of 17β-estradiol (expressed as bolus dose in ng kg−1+infusion rate in ng kg−1 min−1) on the total number of ventricular premature beats (VPBs) in each individual anaesthetized (a) female and (b) male rat which survived the 25 min period of myocardial ischaemia. *P<0.05, **P<0.01, ***P<0.001, compared to vehicle, Kruskal Wallis test.
