Describes a temporary set of symptoms due to ischaemia in the posterior circulation of the brain

Aetiology

• Caused by narrowing of the posterior circulation arteries, most commonly due to arteriosclerosis

Clinical features

• Causes vertigo on looking up
• For diagnosis of VBI need other symptoms of impaired circulation in posterior brain associated with the vertigo
  • Visual disturbance
  • Weakness
  • Numbness

Investigations

• Bloods: FBC, U+Es, LFTs, cholesterol, electrolytes, coag screen
• Imaging:
  • CT/MRI
  • CTA or MRA: can be used to detect atherosclerosis and other diseases in the posterior circulation arteries

Management

• Management of atherosclerosis risk factors
• Some patients may be suitable for surgery