Table 3.

Artery cross-sectional area and diameter at normoxia (baseline) and during systemic hypoxia.

		CSA (mm2)		Diameter (mm)
Artery		Normoxia	Hypoxia	Normoxia	Hypoxia
ICA	Right	13.5 ± 1.3	15.8 ± 1.6*	4.1 ± 0.2	4.4 ± 0.2*
	Left	13.0 ± 1.5	14.3 ± 1.7*	4.0 ± 0.2	4.2 ± 0.2*
MCA	Right	6.7 ± 0.4	7.5 ± 0.5*	2.9 ± 0.1	3.1 ± 0.1*
	Left	6.9 ± 0.4	7.5 ± 0.6*	2.9 ± 0.1	3.1 ± 0.1*
ACA	Right	5.2 ± 0.4	5.6 ± 0.4	2.6 ± 0.1	2.7 ± 0.1
	Left	4.9 ± 0.4	5.3 ± 0.7	2.5 ± 0.1	2.6 ± 0.2
VA	Right	5.6 ± 0.7	6.4 ± 1.0*	2.5 ± 0.3	2.7 ± 0.3*
	Left	6.4 ± 1.0	6.3 ± 1.0	2.4 ± 0.4	2.4 ± 0.3
BA		7.4 ± 0.7	7.3 ± 0.6	2.4 ± 0.2	2.3 ± 0.1
PCA	Right	3.8 ± 0.2	3.7 ± 0.2	4.2 ± 0.2	4.5 ± 0.3
	Left	2.2 ± 0.1	2.2 ± 0.1	2.3 ± 0.1	2.4 ± 0.1

Data are presented as mean ± SE. Anterior circulation is the top portion of table, and bottom portion of the table is the posterior circulation. ICA: internal carotid arteries; MCA: middle cerebral arteries; ACA: anterior cerebral arteries; VA: vertebral arteries; BA: basilar artery; PCA: posterior cerebral arteries; CSA: cross-sectional area.

^*Significantly different between hypoxia and normoxic baseline (p < 0.05).