Table 1 Transcranial Doppler characteristics
From: Aneurysmal subarachnoid haemorrhage from a neuroimaging perspective
Artery | Window | Depth (mm) | Direction of flow | Mean flow velocity (cm/second) |
|---|---|---|---|---|
Middle cerebral | Temporal | 40 to 60 | Toward probe | 55 ± 12 |
Anterior cerebral | Temporal | 60 to 85 | Away from probe | 50 ± 11 |
Posterior cerebral | Temporal | 60 to 70 | Toward | 40 ± 10 |
Extracranial internal carotid | Submandibular | 50 | Away | 28 ± 17 |
Vertebral | Occipital | 60 to 80 | Away | 38 ± 10 |
Basilar | Occipital | 80 to 120 | Away | 41 ± 10 |