Definition of TIA is, patient signs and symptoms resolve by: (A) 24 hours, (B) 36 hours, (C) 48 hours, (D) 72 hours
Answer is A. When blood flow is quickly restored, brain tissue can recover fully and the patient's symptoms are only transient, this is called a transient ischemic attack (TIA). The definition of TIA requires that all neurologic signs and symptoms resolve within 24 h without evidence of brain infarction on brain imaging. Most TIAs last <1 h.Stroke has occurred if the neurologic signs and symptoms last for >24 h or brain infarction is demonstratedRef: Harrison 19e pg: 2559