[Retracted] Effect of Dexmedetomidine Combined with Ropivacaine on Cognitive Dysfunction and Inflammatory Response in Patients Undergoing Craniocerebral Surgery

Figure 4

Comparison of heart rate between the two groups at different times. Note: the abscissa from left to right represents T0, T1, T2, T3, and T4, and the ordinate represents heart rate. There was no statistically significant difference in the comparison of the heart rate at T0 between the experimental group () and the control group (; , ). There was no statistically significant difference in the comparison of the heart rate at T1 between the experimental group () and the control group (; , ). There was no statistically significant difference in the comparison of the heart rate at T2 between the experimental group () and the control group (; , ). There was no statistically significant difference in the comparison of the heart rate at T3 between the experimental group () and the control group (; , ). There was no statistically significant difference in the comparison of the heart rate at T4 between the experimental group () and the control group (; , ).