Fig. 7. Activity of lactate dehydrogenase (LDH) in baseline (non-experimental) ventricles, and in ventricles exposed to each of the treatments in Experiment 2. Ventricular LDH values are means + S.E.M., where 1 unit = conversion of 1 µmol substrate to product per min. There were no significant differences in average LDH activities between any of these groups (P<0.05), as determined using one-way ANOVA (N=4–7 in each group).