Long-Term Risk of Stroke after Transient Ischemic Attack

Area of Science:

• Neurology
• Cardiology
• Public Health

Background:

• Transient ischemic attack (TIA) carries a significant stroke risk without active management.
• Previous studies highlighted the need for rapid TIA patient management.
• This study evaluates stroke risks following the implementation of a more active TIA management approach.

Purpose of the Study:

• To investigate long-term stroke risks after implementing active TIA management.
• To assess the predictive value of the ABCD2 score in this context.

Main Methods:

• Utilized data from Sweden's national stroke registry (Riksstroke) and cause-of-death register (2011-2012).
• Monitored stroke occurrence and evaluated risk using Cox regression.
• Assessed ABCD2 score predictive value via receiver operating characteristics curve analysis.

Main Results:

• 14,102 patients experienced 15,068 TIA episodes; 3.9% had subsequent strokes.
• Significant stroke risk factors included age, prior TIA, atrial fibrillation (AF), oral anticoagulant (OAC) use, hypertension treatment, and specific ABCD2 score components.
• The ABCD2 score showed correlation with stroke but had low predictive value.

Conclusions:

• Stroke risk post-TIA appears lower than in prior studies, potentially due to improved secondary prevention.
• Inadequate hypertension treatment and underuse of OACs for AF are identified concerns.
• The clinical utility of the ABCD2 score for predicting long-term stroke risk remains uncertain.