Background: Rapid yet comprehensive neuroimaging protocols are required for patients with suspected acute stroke. However, stroke mimics can account for approximately one in five clinically diagnosed acute ischemic strokes and the rate of thrombolyzed mimics can be as high as 17%. Therefore, to accurately determine the diagnosis and differentiate mimics from true transient ischemic attacks, acute ischemic stroke is a challenge to every clinician.
Discussion: Medical history and neurological examination, noncontract head computed tomography, and routine magnetic resonance imaging play important roles in the assessment and management of patients with transient neurological attacks in the emergency department. This review attempts to summarize how neuroimaging can be utilized to help differentiate the most common mimics from transient ischemic attack and acute ischemic stroke. Conclusion: Although imaging can help direct critical triage decisions for intravenous thrombolysis or endovascular therapy, more detailed medical history and neurological examination are crucial for making a prompt and accurate diagnosis for transient neurological attack patients. K E Y W O R D S acute ischemic stroke, computed tomography, magnetic resonance image, transient and neurological attack, transient ischemic attack 1 INTRODUCTION Transient neurological attacks (TNAs) are common causes of emergency department (ED) visits. The final diagnosis of patients with TNAs can be divided into three categories: transient ischemic attack (TIA), acute ischemic stroke (AIS), and mimics (Mimics) after obtaining medical history, neurological examination, laboratory tests, and neuroimaging. As the risk of stroke recurrence or progression is highest in the 90 days following the first episode of either TIA or AIS, these two causes are of greatest concern. However, focal ischemia is not the cause of most TNAs. According to the literature, Mimics account for This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.