Less commonly, cerebral infarction may result from:
cerebral vasospasm:
following subarachnoid haemorrhage
migraine
haemodynamic effects:
following a rapid fall in local perfusion pressure in severe systemic hypotension or cardiac arrest
carotid occlusion in patients with an inadequate collateral supply from the contralateral carotid artery
subclavian steal syndrome - usually causes TIA
vasculitis - a rare but important cause of cerebral infarction as immediate immunosuppressive therapy is indicated; more common causes include giant cell arteritis, polyarteritis nodosa, systemic lupus erythematosus, Takayasu's disease, radiation angiopathy
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