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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
Published on: August 18, 2015
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Epidemiology of transient ischemic attack in the Normandy Stroke population-based study
Romain Schneckenburger1,2,3, Marion Boulanger1,2,3, Ahmad Nehme1,2,3
1Université Caen Normandie, Caen, France.
European Stroke Journal
|May 7, 2024
Summary
The new tissue-based definition for transient ischemic attack (TIA) reduced its incidence by 27.5% but did not affect the 90-day stroke risk. This neurological emergency remains a significant public health concern.
Area of Science:
- Neurology
- Epidemiology
- Public Health
Background:
- Transient ischemic attack (TIA) is a common neurological emergency with evolving definitions and management strategies.
- Recent epidemiological data on TIA incidence and recurrence risk are limited.
- The shift from a time-based to a tissue-based definition impacts TIA classification.
Purpose of the Study:
- To assess the impact of the tissue-based TIA definition on incidence and recurrence rates.
- To provide updated epidemiological data on TIA in a population-based cohort.
- To analyze the role of MRI in TIA diagnosis.
Main Methods:
- Prospective inclusion of TIAs from the Normandy Stroke Study (May 2017-May 2021).
- Classification of TIAs as time-based (<24h) or tissue-based (<24h and no brain lesion on imaging).
- Calculation of attack and incidence rates, and 90-day ischemic stroke rates.
Main Results:
- 567 TIAs were included; 80.6% underwent brain MRI.
- The tissue-based definition identified 72.3% of cases.
- Age-standardized incidence rate was 29.7 per 100,000 person-years; 90-day recurrent stroke rate was 2.7%.
Conclusions:
- The tissue-based TIA definition reduced incidence by 27.5% compared to the time-based definition.
- The 90-day stroke rate remained unchanged regardless of MRI findings.
- The TIA burden is substantial and projected to rise with an aging population.
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