Table 3 Comparison of blood flow change of vertebrobasilar artery between two groups in TCD examination (\( \overline{\mathrm{x}} \) ± s, v/cms⁻¹)

Observation group (n = 80)

BA

44.52 ± 5.53^a

24.38 ± 8.39^a

32.46 ± 9.46^a

0.73 ± 0.12^a

0.67 ± 0.12^a

VA

Left

33.63 ± 10.09^a

20.30 ± 6.69^a

24.36 ± 7.38^a

0.79 ± 0.12^a

0.65 ± 0.07^a

Right

33.95 ± 11.02^a

18.06 ± 6.45^a

25.18 ± 8.36^a

0.77 ± 0.13^a

0.66 ± 0.16^a

Control group (n = 80)

BA

53.92 ± 9.86

27.56 ± 8.95

36.46 ± 8.46

0.70 ± 0.08

0.62 ± 0.05

VA

Left

45.36 ± 9.34

20.33 ± 7.63

30.14 ± 7.46

0.71 ± 0.09

0.58 ± 0.06

Right

43.26 ± 9.78

22.36 ± 7.56

28.60 ± 7.08

0.71 ± 0.11

0.56 ± 0.03