Development and Validation of a Risk Score for Predicting Ischemic Stroke After Transient Ischemic Attack

Area of Science:

• Neurology
• Emergency Medicine
• Cardiology

Background:

• Transient ischemic attack (TIA) poses a significant risk for subsequent ischemic stroke.
• Effective risk stratification is crucial for identifying high-risk TIA patients to prevent permanent disability.
• Current methods require enhancement for accurate prediction in emergency settings.

Purpose of the Study:

• To develop and validate a novel scoring system for predicting acute ischemic stroke within 90 days post-TIA.
• To create a practical tool for use in the emergency department (ED) setting.
• To improve risk stratification accuracy for TIA patients.

Main Methods:

• Retrospective analysis of 557 TIA patients from a stroke registry (January 2011 - September 2018).
• Data collection included patient characteristics, medication history, ECG, and CT imaging.
• Multivariable logistic regression and receiver operating characteristic (ROC) analysis were used to develop the MESH score.

Main Results:

• The MESH (Medication, Electrocardiogram, Stenosis, Hypodense) score was developed, incorporating antiplatelet use, right bundle branch block, intracranial stenosis (≥50%), and hypodense area size (≥4 cm).
• The MESH score demonstrated adequate discrimination (AUC=0.78) and calibration (HL test=0.78).
• A cutoff of 2 points yielded a sensitivity of 60.71% and specificity of 81.66% for predicting 90-day stroke risk.

Conclusions:

• The MESH score offers improved accuracy for TIA risk stratification in the ED.
• This scoring system can aid clinicians in identifying high-risk TIA patients for timely intervention.
• The MESH score facilitates better management of TIA patients to prevent ischemic stroke.