Last reviewed 01/2018
Following a TIA, there is an:
- risk of stroke after TIA was 14.5% at 1 year (1)
- a systematic review revealed risk of stroke was 9.9%, 13.4%, and 17.3% at 2, 30, and 90 days (2)
- risks for myocardial infarction or non-stroke vascular death after transient ischaemic attack are each 2% per year (3)
The exact risk depends upon the type, frequency and cause of the TIA. For example, several episodes associated with greater than 75% stenosis of one carotid artery carries a much worse prognosis than a single attack in a patient with mild hypertension.
- (1) Neurology. 2004 Jun 8;62(11):2015-20
- (2) Wu CM et al. Early risk of stroke after transient ischemic attack: a systematic review and meta-analysis. Arch Intern Med. 2007 Dec 10;167(22):2417-22.
- (3)Touze E et al. Risk of myocardial infarction and vascular death after transient ischemic attack and ischemic stroke: a systematic review and meta-analysis. Stroke 2005;36:2748-55