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(A) Representative ECG of rats in different groups. (B) Effects of CNS on isoproterenol-induced electrocardiographic changes. Values expressed as the mean ± SD. Significance was assessed with a two-tailed Student’s t-test: ##p < 0.01 vs. the normal group; ∗p < 0.05, ∗∗p < 0.01 vs. the model group.
