Cerebral Blood Flow Dynamics and Head-of-Bed Changes in the Setting of Subarachnoid Hemorrhage

Table 2

Average blood flow velocities and percentage changes in each vascular distribution.

(a)

Average velocity (cm/s)	Day 3		Day 7		Day 10
	Supine	Upright	Supine	Upright	Supine	Upright
MCA	79	73	111	106	90	92
SD	56	41	49	46	46	52
ACA	69	72	72	62	56	68
SD	42	46	23	23	26	39
PCA	70	75	59	68	67	72

(b)

Percentage changes from supine to upright (%)	Day 3	Day 7	Day 10
MCA	0.9	−3.2	1.0
ACA	11.1	−9.2	24.2
PCA	12.9	11.3	14.6