Table 1.
Risk factors for the development of cerebral hyperperfusion defined by intraoperative regional cerebral oxygen saturation monitoring
| Risk factors | Postoperative hyperperfusion | p Value | |
|---|---|---|---|
| Yes (n = 8) | No (n = 72) | ||
| Age (y) (mean ± SD) | 69.6±8.0 | 68.8±6.7 | 0.6297 |
| Male gender | 8 (100%) | 67 (93%) | >0.9999 |
| Hypertension | 8 (100%) | 64 (89%) | >0.9999 |
| Diabetes mellitus | 3 (38%) | 30 (42%) | >0.9999 |
| Hyperlipidemia | 6 (75%) | 34 (47%) | 0.2633 |
| Symptomatic lesions | 7 (88%) | 52 (72%) | 0.6736 |
| Degree of ICA stenosis (%)(mean ± SD) | 90.6±8.6 | 87.4±8.4 | 0.1158 |
| Duration of ICA clamping (min) (mean ± SD) | 36.3±5.2 | 36.0±5.3 | 0.8850 |
| ATC-AR in preoperative late/early IMZ images | 1.112±0.061 | 1.007±0.054 | 0.0001 |
SD, standard deviation; ICA, internal carotid artery; ATC-AR, affected-to-contralateral side asymmetry ratio; IMZ, iomazenil.