title: TIA offers a warning sign that a stroke may be on its way.
abstract: Transient ischaemic attack (TIA) produces brief stroke-like symptoms due to temporary disruption of blood to the brain. It is characterised by focal symptoms, specific to one location or function, lasting less than 24 hours. TIAs are a warning sign that the individual is at risk of a stroke or myocardial infarction and national stroke guidelines recommend assessment at a neurovascular clinic within seven days. They are most severe at onset and gradually resolve. Symptoms usually involve loss of movement, speech or sensation rather than positive symptoms such as pins and needles. Despite the short duration of symptoms, ignoring the episode can have serious consequences. Risk of stroke is 8 per cent in the first seven days after a TIA and 12 per cent in the first month but the most likely cause of death post TIA is heart disease. The high level of risk means that patients should not drive during the month following a TIA.