Table 1:

Diameters (μm) of murine cerebral arteries measured in vivo using DSA

	Mouse 1	Mouse 2	Mouse 3	Mouse 4	Mouse 5	Mean ± 1 SD	P Value
ICA
0′	145	183	150	172	154	160.8 ± 16.05	<.05
15′	158	210	180	178	182	181.6 ± 18.57
30′	122	169	138	152	140	144.2 ± 17.50	<.05
ACA
0′	105	143	108	112	105	114.6 ± 16.13	<.05
15′	136	165	127	117	116	132.2 ± 20.07
30′	101	128	96	106	96	105.4 ± 13.30	<.05
MCA
0′	109	152	123	128	112	124.8 ± 17.08	<.05
15′	116	176	145	135	120	138.4 ± 24.03
30′	107	131	118	126	99	116.2 ± 13.22	<.05

Note:—Initially, DSA measurements were performed in a status of normocapnia (mice breathing room air; time point 0′). Dilation of cerebral arteries was measured 15 minutes after induction of hypoxic hypercapnia (time point 15′). Finally, constriction of cerebral arteries was measured after breathing oxygenated room air (time point 30′).