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Table 4: Cerebral blood flow and metabolism in the normal and increased OEF groups
Normal OEF (n = 9) Increased OEF (n = 4)
Ipsilateral MCA 
    CBF (mL · 100 g⁻¹ · min⁻¹) 42.6 ± 8.1 40.9 ± 8.1
    OEF (%) 43.1 ± 3.9 53.7 ± 3.1
    CBV (mL · 100 g⁻¹)^* 4.3 ± 1.3 6.3 ± 1.4
    CMRO₂ (mL · 100 g⁻¹ · min⁻¹) 3.3 ± 0.6 3.4 ± 0.5
    CBF/CBV (min⁻¹)^* 10.5 ± 2.9 6.6 ± 1.2
Ipsilateral corona radiata 
    CBF 30.6 ± 9.2 28.9 ± 4.9
    OEF 39.2 ± 7.7 46.8 ± 5.5
    CBV^* 3.1 ± 1.3 5.0 ± 0.7
    CMRO₂ 2.1 ± 0.5 2.1 ± 0.3
    CBF/CBV^* 11.5 ± 6.0 6.0 ± 1.5
Contralateral MCA 
    CBF 46.8 ± 5.7 42.7 ± 11.4
    OEF^† 41.8 ± 3.9 50.0 ± 4.3
    CBV 4.3 ± 1.2 5.5 ± 1.6
    CMRO₂ 3.5 ± 0.5 3.3 ± 0.7
    CBF/CBV 11.6 ± 3.3 8.4 ± 3.9
Ipsilateral ACA 
    CBF 41.3 ± 6.2 36.0 ± 8.9
    OEF^† 40.8 ± 3.8 50.4 ± 5.7
    CBV 4.6 ± 1.4 5.5 ± 1.2
    CMRO₂ 3.0 ± 0.3 2.8 ± 0.6
    CBF/CBV 10.0 ± 4.1 6.7 ± 2.0
Ipsilateral PCA 
    CBF 43.8 ± 8.3 41.0 ± 7.2
    OEF^† 44.3 ± 4.2 53.5 ± 4.4
    CBV 4.4 ± 1.5 6.3 ± 1.7
    CMRO₂ 3.2 ± 0.5 3.4 ± 0.6
    CBF/CBV 10.0 ± 3.4 6.7 ± 1.2
Note:—CBF indicates cerebral bloodflow; OEF, oxygen extraction fraction; CBV, cerebral blood volume; CMRO₂, cerebral metabolic rate of oxygen; MCA, middle cerebral artery; ACA, anterior cerebral artery; PCA, posterior cerebral artery.
* P < .05.
† P < .01.