Table 3.
Baseline cerebral blood flow and cerebrovascular reactivity in each perfusion territory per patient group.
| Cerebral blood flow/cerebrovascular
reactivity |
|||||
|---|---|---|---|---|---|
| Hemisphere | N | ACA | MCA | PCA | |
| Patients with ICA stenosis | |||||
| No collateral flow | Ipsilateral | 35 | 47 ± 7.9/39 ± 7.9 | 45 ± 7.5/37 ± 9.0 | 44 ± 6.4/58 ± 10 |
| Contralateral | 48 ± 8.2/45 ± 9.3 | 47 ± 6.2/45 ± 9.9 | 44 ± 6.5/57 ± 9.6 | ||
| Anterior collateral flow | Ipsilateral | 15 | 45 ± 8.4/33 ± 8.5a | 43 ± 7.4/36 ± 9.0 | 42 ± 6.5/58 ± 10 |
| Contralateral | 48 ± 9.6/43 ± 8.7 | 43 ± 6.9/45 ± 8.4 | 42 ± 6.1/60 ± 11 | ||
| Secondary collateral flow | Ipsilateral | 0 | |||
| Contralateral | |||||
| Patients with ICA occlusion | |||||
| Anterior collateral flow | Ipsilateral | 11 | 48 ± 9.1/24 ± 14 | 43 ± 7.6/27 ± 13 | 44 ± 8.4/44 ± 14 |
| Contralateral | 50 ± 9.5/40 ± 15 | 49 ± 9.4/32 ± 14 | 44 ± 9.2/48 ± 15 | ||
| Posterior-to-anterior | Ipsilateral | 17 | 41 ± 8.8/24 ± 12 | 39 ± 8.5/16 ± 11b | 37 ± 9.4/41 ± 14 |
| collateral flow | Contralateral | 44 ± 9.1/36 ± 13 | 47 ± 9.1/34 ± 13 | 40 ± 8.5/40 ± 14 | |
| Secondary collateral flow | Ipsilateral | 10 | 42 ± 8.7/20 ± 13 | 38 ± 9.3/9 ± 10c | 43 ± 8.3/31 ± 13 |
| Contralateral | 49 ± 9.4/37 ± 14 | 48 ± 5.9/29 ± 10 | 44 ± 7.7/34 ± 10 | ||
ACA: anterior cerebral artery; ICA: internal carotid artery; MCA: middle cerebral artery; PCA: posterior cerebral artery.
Difference (p < 0.05) in cerebrovascular reactivity in the ipsilateral ACA territory between patients with anterior collateral flow, and patients with no collateral flow.
Difference (p < 0.005) in cerebrovascular reactivity in the ipsilateral MCA territory between patients with anterior collateral flow, and patients with posterior-to-anterior collateral flow.
Difference (p < 0.001) in cerebrovascular reactivity in the ipsilateral MCA territory between patients with anterior collateral flow, and patients with secondary collateral flow.