Hemodynamic status of the SPS in the cases of normal venous circulation on carotid angiography
| Demonstration/Hemodynamics | Number of Sides (%) |
|---|---|
| Partial demonstration | 10 (4.2) |
| BVR→ LMV→ PV→ posterior segments of SPS | 8 (3.4) |
| BVR→ LMV→ PV→ anterior segment of SPS | 2 (0.8) |
| Total demonstration (SS→ SPS→ CS) | 1 (0.4) |
Note:—BVR indicates basal vein of Rosenthal; CS, cavernous sinus; LMV, lateral mesencephalic vein; PV, petrosal vein; SS, sigmoid sinus.