Figure 1: Comparison of the ECG-R-R and ECG-ST in rats for each group ( each group). ECG images are examples of four groups, involving 10 cardiac cycles in each figure. We can find out the changes in these pictures, normal group example ((a), R-R interval is 1.31 ms and ST amplitude is 0.06 mV), model group example ((b), R-R interval is 1.68 ms, and ST amplitude is 0.13 mV), PC6 group example ((c), R-R interval is 1.42 ms, and ST amplitude is 0.1 mV) and LI4 group example ((d), R-R interval is 1.42 ms, and ST amplitude is 0.09 mV). R-R interval prolonged and ST amplitude heightened in (b) while these two values diminished in (c, d). versus normal; versus model; versus PC6.