Table 4.
Presence of a relative cerebellar and brainstem hypoperfusion in the non-VADa and BAC cohort with UIV patients.
| Indicators (n) | Hypoperfusion | No hypoperfusion | P |
|---|---|---|---|
| Non-VAD cohort (n = 43) | 35 (81.40) | 8 (18.60) | 0.005 |
| Normal VA cohort (n = 23) | 11 (47.83) | 12 (52.17) | |
| Non-VAD side (n = 43) | 26 (60.47) | 17 (39.53) | 0.000 |
| VAD side (n = 43) | 9 (20.93) | 34 (79.07) | |
| BACb cohort (n = 39) | 30 (76.92) | 9 (23.08) | 0.034 |
| Normal BA cohort (n = 27) | 14 (51.85) | 13 (48.15) | |
| Opposite of BACc (n = 36) | 25 (69.44) | 11 (30.56) | 0.000 |
| BAC side (n = 36) | 5 (13.89) | 31 (86.11) |
All values given as absolute numbers (%). VAD, vertebral artery dominance; BA, basilar artery; BAC, basilar artery curvature.
a
Defined by the opposite side to the VAD and VAH, and exclude stenosis or occlusion.
b
Defined by the BAC cohort, exclude VAS or VAO, BAS.
c
Defined by the opposite direction side to BAC, and clear “C” or “J” type curvature toward either the left or the right sides. And exclude VAS or VAO, BAS.