Question

A 46-year-old with thunderclap headache has a normal non-contrast CT head performed 8 hours after onset. Neurological exam is normal. What is the next best diagnostic step to exclude subarachnoid haemorrhage?

Accepted Answer

Lumbar puncture for xanthochromia after 12 hours from onset

Answer

Discharge with reassurance

Answer

CT angiography immediately

Answer

MRI brain with contrast

Answer

Empirical nimodipine and observe

Practice question

A 46-year-old with thunderclap headache has a normal non-contrast CT head performed 8 hours after onset. Neurological exam is normal. What is the next best diagnostic step to exclude subarachnoid haemorrhage?