neurologic disorders
Transient Ischemic Attack (TIA)
Introduction
A transient ischemic attack (TIA) is focal brain ischemia that causes sudden, transient neurologic deficits and is not accompanied by permanent brain infarction (eg, negative results on diffusion-weighted MRI). Diagnosis is clinical. Carotid endarterectomy or stenting, antiplatelet medications, and anticoagulants decrease risk of stroke after certain types of TIA. TIA is similar to Ischemic Stroke except that symptoms usually last TIAs are most common among middle-aged and older people. TIAs markedly increase risk of stroke, beginning in the first 24 hours. 