Average flow velocity and flow volume rate of the basilar artery in posterior circulation ischemia and control groups
| PCI Group | Control Group | P* | |
|---|---|---|---|
| Range of interest, cm2 | 0.10 ± 0.03 | 0.11 ± 0.03 | NS |
| Maximum average velocity, cm/s | 29.2 ± 9.2 | 38.5 ± 8.2 | <.005 |
| Minimum average velocity, cm/s | 10.0 ± 4.0 | 11.3 ± 5.0 | NS |
| Mean average velocity, cm/s | 18.0 ± 5.6 | 22.6 ± 5.0 | <.01 |
| Flow volume rate, mL/min | 103.3 ± 37.3 | 148.8 ± 40.0 | <.001 |
Note.—PCI indicates posterior cerebral ischemia.
* Student t test.