Differentiation of true transient ischemic attack versus transient ischemic attack mimics
Ali Noureddine1, Kavian Ghandehari2, Mohammad Taghi Shakeri3
1Department of Neurology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Iranian Journal of Neurology
|November 26, 2014
Summary
Ten percent of suspected transient ischemic attack (TIA) patients were actually stroke mimics. Clinical factors like hypertension and aphasia predict true TIA, but diagnosis requires a stroke neurologist.
Area of Science:
- Neurology
- Cerebrovascular Diseases
- Diagnostic Accuracy
Background:
- Transient ischemic attack (TIA) mimic rates range from 9-31% in existing literature.
- Accurate differentiation between TIA and stroke mimics is crucial for appropriate patient management.
- This study addresses the need to quantify stroke mimic prevalence in suspected TIA cases.
Purpose of the Study:
- To determine the proportion of stroke mimics among patients presenting with suspected TIA.
- To identify clinical predictors that differentiate true TIA from stroke mimics.
Main Methods:
- A prospective observational study conducted at Ghaem Hospital, Mashhad, Iran (2012-2013).
- Consecutive patients with suspected TIA were enrolled and followed for 3 months.
- Initial diagnosis by neurology resident; final diagnosis by stroke subspecialist after follow-up.
Main Results:
- Out of 310 assessed patients, 10% were classified as TIA mimics.
- Hypertension, aphasia, symptom duration, and older age were significant predictors of true TIA.
- Migraine was the most frequent cause of stroke mimic in this cohort.
Conclusions:
- Many clinical signs and symptoms have limited value in distinguishing true TIA from non-cerebrovascular events.
- The predictive utility of any sign or symptom for TIA requires interpretation by a specialized stroke neurologist.
- Accurate diagnosis of TIA versus mimicry necessitates expert clinical judgment and comprehensive evaluation.
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