Subarachnoid haemorrhage (SAH)
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Subarachnoid haemorrhage (SAH)
- Dense material in the basal cisterns and fissures is due to acute bleeding into the subarachnoid space
- Blood in the subarachnoid space can fill or partly fill the sulci, fissures, basal cisterns and ventricles
Clinical information
- (All 3 images on this page)
- Sudden onset of severe - 'worst ever' - headache
Subarachnoid haemorrhage (SAH)
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Subarachnoid haemorrhage (SAH)
- Occasionally blood is seen layered over the tentorium which appears denser than is normally seen
Subarachnoid haemorrhage (SAH)
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Subarachnoid haemorrhage (SAH)
- Blood in the ventricles may be the only sign of subarachnoid haemorrhage
- When a CT scan is acquired the patient lies supine and any blood in the lateral ventricles will collect posteriorly
- Calcification of the choroid plexus is a normal finding which should not be mistaken for intraventricular blood