Table 2 Hemodynamic parameters at different time points in four groups (n = 75 per group)

 Baseline

89.7 ± 9.2

91.5 ± 9.1

 10 min_Anesthesia

69.7 ± 6.1^a

90.5 ± 9.0^c

 30 min_Anesthesia

71.5 ± 6.7^a

92.8 ± 9.3^c

 60 min_Anesthesia

72.8 ± 7.4^a

97.7 ± 9.6^c

 End of operation

75.9 ± 8.1^a

98.3 ± 10.5^c

 Baseline

81.5 ± 8.3

82.3 ± 8.1

 10 min_Anesthesia

67.5 ± 6.2^a

66.5 ± 7.4^a

 30 min_Anesthesia

69.7 ± 8.2^a

66.6 ± 8.9^a

 60 min_Anesthesia

71.3 ± 8.4^a

68.8 ± 8.7^a

 End of operation

71.5 ± 8.6^a

71.3 ± 8.9^a

 Baseline

10,451.3 ± 269.5

10,490.2 ± 290.8

 10 min_Anesthesia

7572.7 ± 187.6^a

9605.6 ± 301^c

 30 min_Anesthesia

7691.3 ± 279.4^a

9609.8 ± 306.5^c

 60 min_Anesthesia

7718.6 ± 286.2^a

10,313.5 ± 287.3^c

 End of operation

7995.4 ± 297.3^a

10,482.7 ± 291.5^c

 Baseline

8.6 ± 1.2

8.5 ± 1.3

 10 min_Anesthesia

3.9 ± 1.1^a

5.8 ± 1.1^ac

 30 min_Anesthesia

4.0 ± 1.1^a

6.1 ± 1.0^ac

 60 min_Anesthesia

4.5 ± 1.0^a

6.3 ± 1.1^ac

 End of operation

4.7 ± 1.1^a

6.5 ± 1.0^ac

 Baseline

98.6 ± 1.1

98.8 ± 1.0

 10 min_Anesthesia

98.1 ± 1.1

98.6 ± 1.2

 30 min_Anesthesia

98.5 ± 1.2

98.7 ± 1.2

 60 min_Anesthesia

98.4 ± 1.0

98.7 ± 1.1

 End of operation

98.3 ± 1.3

98.8 ± 1.0

 Baseline

6.99 ± 1.12

7.07 ± 1.12

 10 min_Anesthesia

4.44 ± 0.84^a

6.21 ± 1.17^c

 30 min_Anesthesia

4.68 ± 1.00^a

6.30 ± 1.31^c

 60 min_Anesthesia

4.93 ± 1.05^a

6.52. ± 1.3^c

 End of operation

4.96 ± 1.08^a

6.78 ± 1.39^c

 Baseline

85.3 ± 5.0

85.4 ± 5.2

 10 min_Anesthesia

65.3. ± 6.4^a

92.5 ± 7.3^c

 30 min_Anesthesia

66.4 ± 6.5^a

93.6 ± 7.2^c

 60 min_Anesthesia

68.3 ± 6.7^a

93.8 ± 7.3^c

 End of operation

68.6 ± 6.9^a

94.1 ± 7.8^c