Severity of Vasospasm | MFV Value cm/s | MCA/ICA Ratio |
---|---|---|
Normal | <85 | <3 |
Mild | <120 | <3 |
Moderate | 120 to 150 | 3 to 5.9 |
Severe | 151 to 200 | >6 |
Critical | >200 | >6 |
TCD, transcranial Doppler; MFV, mean flow velocity; MCA, middle cerebral artery; ICA, internal carotid artery.