TIA. Lasts less than 24 hours. Cva is a stroke that has permanent damage.
Cva. Tia is transient (brief) ischemic (low oxygen) attack (episode), mini stroke, symptom last less than 24 hours, without damage. Cva (stroke) symptom last more than 24 hours. You may recover completely, have significant damage, or die. Avoiding hypertension or treating it is important in order to prevent a first event or subsequent events (cva or tia).