Hemodynamic values for the hemisphere ipsilateral to the occlusion in patients with (n = 9) and with leptomeningeal collateral vessels
| Leptomeningeal Vessels Present | No Leptomeningeal Vessels | |||||
|---|---|---|---|---|---|---|
| CBF* | Transit Time | Trailing Edge | CBF | Transit Time | Trailing Edge | |
| Anterior frontal | 31 ± 9 | 83 ± 46 | 2436 ± 275† | 31 ± 2 | 25 ± 15 | 1648 ± 201 |
| Posterior frontal | 29 ± 5† | 196 ± 103 | 2700 ± 469 | 47 ± 6 | 85 ± 32 | 1598 ± 348 |
| Frontal parietal | 45 ± 4 | 228 ± 53 | 2362 ± 208 | 52 ± 6 | 97 ± 76 | 2103 ± 259 |
| Parietal occipital | 41 ± 11 | 529 ± 163 | 2089 ± 285 | 33 ± 10 | 411 ± 106 | 2185 ± 271 |
| Occipital | 54 ± 13 | 381 ± 138 | 1815 ± 128† | 47 ± 5 | 359 ± 94 | 2388 ± 203 |
* Cerebral blood flow values are given in milliliters/minute/100 g, and transit and trailing edge times, in milliseconds.
† A statistically significant difference between the patients with and without leptomeningeal vessels (t test, P < .05).