Correlation between ivy proliferation and MRA stage and angiographic findings
| MRA Stage (IDH) | MRA Stage (ILDH) | rACCT Ratio | |
|---|---|---|---|
| Ivy unsymmetric (n = 22) | 2.95 ± 0.39* | 2.60 ± 0.50 | 2.10 ± 0.24* (n = 9) |
| Ivy symmetric (n = 12) | 2.78 ± 0.39 (left side) | 2.88 ± 0.33 (right side) | 1.10 ± 0.23 (n = 7) |
Note:—IDH indicates ivy-dominant hemisphere; ILDH, ivy less-dominant hemisphere; rACCT, regional arteriocapillary circulation time.
* P < .05 (comparison between IDH and ILDH in ivy unsymmetric or right and left in patients with symmetric ivy sign on MRA and comparison between patients with ivy unsymmetric sign and those with ivy symmetric sign of rACTT ratio on angiography).