Table IX.
Correlation between Fisher grade and symptomatic cerebral vasospasm (SCVS).
| Group | N | SCVS | Incidence |
|---|---|---|---|
| Grade I–II | 22 | 4 | 18.2% |
| Grade III–IV | 27 | 15 | 55.6% |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.