Table 2.

Autoregulation Indices

Variable	Normotensive	Hypertensive	Stroke
MCA side	Right	Right	Non-stroke-side
ARI	5.7 ± 3.3	6.1 ± 2.6	6.1 ± 2.6
RoR – descending slope	0.7 ± 0.1	1.1 ± 0.6	0.6 ± 0.2
RoR – ascending slope	0.5 ± 0.1	1.6 ± 1.0	0.6 ± 0.2
MCA side	Left	Left	Stroke-side
ARI	5.9 ± 3.2	5.9 ± 2.6	5.1 ± 1.9
RoR-descending slope	0.6 ± 0.1	0.8 ± 0.4	0.5 ± 0.2
RoR-ascending slope	0.5 ± 0.1	1.5 ± 1.0	0.6 ± 0.2

Autoregulation index (ARI) and the rate of autoregulation (RoR) for the right and left MCAs in the normotensive and hypertensive groups and for the non-stroke and stroke side MCA in the stroke group. RoR – descending slope of the linear portion of the BP and BFV reduction between the baseline and BP minimum. RoR – ascending slope of the linear portion of the BP and BFV increase between BP minimum and maximum during the VM. ARI and RoR were not significantly different between the groups. Data are presented as mean ± SE