Table 1 Mean value (v) and standard deviation (sd) for Delta Cerebral Venous Outflow (DCDVI), Distal Jugular and Vertebral Draining Index (DJVDI), Collateral FLow Index (CFI) and Cerebral Collateral Draining Index (CCDI)

Supine

Controls

v

5

45

1

33

sd

10

17

3

24

Patients

v

-42

33

61

53

sd

82

17

27

23

Upright

Controls

v

41

9

39

sd

10

19

16

Patients

v

41

33

40

sd

24

31

31