Table 3.
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 side (n = 53) | 44 (83.02) | 9 (16.98) | 0.002 |
| Normal VA (n = 23) | 11 (47.83) | 12 (52.17) | |
| Non-VAD side (n = 53) | 35 (66.04) | 18 (33.96) | 0.000 |
| VAD side (n = 53) | 10 (18.87) | 43 (81.13) | |
| BAC (n = 49) | 39 (79.59) | 10 (20.41) | 0.012 |
| Normal BA (n = 27) | 14 (51.85) | 13 (48.15) | |
| Opposite of BACb (n = 44) | 34 (77.27) | 10 (22.73) | 0.000 |
| BAC side (n = 44) | 7 (15.91) | 37 (84.09) |
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 vertebral artery dominance and vertebral artery hypoplasia, stenosis or occlusion.
b
Defined by the opposite direction side to BAC, and clear basilar artery “C” or “J” type curvature toward either the left or the right sides.