Transient ischemic attacks: Part I. Diagnosis and evaluation

Area of Science:

• Neurology
• Emergency Medicine
• Vascular Medicine

Background:

• Transient ischemic attack (TIA) is increasingly recognized as a significant predictor of future stroke.
• Delayed recognition and management of TIA symptoms can lead to missed opportunities for stroke prevention.
• The 90-day risk of stroke post-TIA is approximately 10%, with a substantial portion occurring within 48 hours.

Purpose of the Study:

• To emphasize the critical nature of Transient Ischemic Attack (TIA) as a stroke precursor.
• To highlight the urgency of emergency department evaluation for TIA symptoms.
• To outline expedited diagnostic and treatment protocols for TIA patients.

Main Methods:

• Review of current understanding of TIA as a stroke harbinger.
• Emphasis on immediate emergency department presentation for TIA symptoms.
• Recommendation for expedited history, physical examination, and laboratory testing within 180 minutes of symptom onset.
• Inclusion of immediate head computed tomographic (CT) scanning to rule out hemorrhage or mass.

Main Results:

• A 90-day stroke risk of approximately 10% following TIA.
• Elevated stroke risk in cases of internal carotid artery stenosis.
• Identification of potential misdiagnoses for TIA, including migraine, seizure, peripheral neuropathy, and anxiety.

Conclusions:

• Transient ischemic attack (TIA) is a medical emergency requiring immediate evaluation.
• Expedited assessment in the emergency department can identify candidates for thrombolytic therapy.
• Timely intervention following TIA is critical to prevent stroke and its associated disabilities.