Table 2.

Baseline cerebral blood flow and cerebrovascular reactivity in each perfusion territory per patient group.

			Cerebral blood flow/cerebrovascular reactivity
	Hemisphere	N	ACA	MCA	PCA
Healthy subjects	Both	29	52 ± 8.1/48 ± 9.9	53 ± 7.7/49 ± 10	47 ± 9.8/61 ± 10
Asymptomatic patients
Patients with ICA stenosis	Ipsilateral	27	49 ± 8.2/45 ± 9.4	47 ± 7.6/43 ± 8.1	44 ± 6.7/59 ± 10
	Contralateral		50 ± 9.4/44 ± 9.6	49 ± 6.6/45 ± 9.8	44 ± 7.3/60 ± 11
Patients with ICA occlusion	Ipsilateral	9	48 ± 8.6/35 ± 11a	43 ± 6.6a/32 ± 10b	42 ± 8.6/48 ± 10
	Contralateral		47 ± 9.1/38 ± 11	47 ± 6.1/39 ± 10	42 ± 8.5/50 ± 11
Symptomatic patients
Patients with ICA stenosis	Ipsilateral	23	44 ± 6.9b/34 ± 7.8bc	41 ± 6.0b/32 ± 7.5bc	42 ± 5.9/57 ± 11
	Contralateral		45 ± 6.8/45 ± 8.7	43 ± 4.8/45 ± 9.1	42 ± 5.2/58 ± 11
Patients with ICA occlusion	Ipsilateral	29	44 ± 9.4a/19 ± 10bd	40 ± 8.8b/13 ± 9.8bd	42 ± 9.2/35 ± 12b
	Contralateral		48 ± 9.7/35 ± 13b	49 ± 9.0/28 ± 9.7b	43 ± 8.8/36 ± 11b

ACA: anterior cerebral artery; ICA: internal carotid artery; MCA: middle cerebral artery; PCA: posterior cerebral artery.

^aDifference (p < 0.001) in baseline CBF or cerebrovascular reactivity in each of the indicated cerebral perfusion territories between the indicated patient groups and the healthy subjects.

^bDifference (p < 0.001) in baseline CBF or cerebrovascular reactivity in each of the indicated cerebral perfusion territories between the indicated patient groups and the healthy subjects.

^cDifference (p < 0.005) in cerebrovascular reactivity in each of the indicated cerebral perfusion territories between patients with symptomatic ICA stenosis, and patients with asymptomatic ICA stenosis.

^dDifference (p < 0.001) in cerebrovascular reactivity in each of the indicated cerebral perfusion territories between patients with symptomatic ICA occlusion, and patients with asymptomatic ICA occlusion.