Fig. 7
![Fig. 7](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12885-021-08938-7/MediaObjects/12885_2021_8938_Fig7_HTML.png)
A shows the mean arterial pressure (MAP) changes at different times in each group. In both groups, the MAP showed significant changes over time, with *P < 0.001. B shows the heart rate (HR) changes at different times in each group. In both groups, the HR showed significant changes over time, with *P < 0.05. P, paravertebral block; R, retrolaminar block