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The risk stratification based on the CHA₂DS₂-VASc may predict the response to intravenous thrombolysis after stroke

Manuel Cappellari1, Paolo Bovi, Nicola Micheletti

  • 1Stroke Unit, Division of Neurology, Department of Neuroscience, Azienda Ospedaliera Univarsitaria Integrata, Piazzale A. Stefani 1, 37126, Verona, Italy, manuel_cappellari@libero.it.

Journal of Neurology
|August 15, 2013
PubMed

Insights

The CHA2DS2-VASc score predicts response to intravenous thrombolysis in stroke patients. Low-risk patients benefit most, while very high-risk patients show a failed response to this treatment.

Area of Science:

  • Neurology
  • Cardiology
  • Emergency Medicine

Background:

  • The CHA2DS2-VASc score is established for assessing thromboembolic risk in patients with atrial fibrillation (AF).
  • Its utility in predicting treatment response to intravenous thrombolysis in acute stroke is less understood.
  • Understanding risk stratification may optimize thrombolytic therapy selection and outcomes.

Purpose of the Study:

  • To evaluate if prestroke CHA2DS2-VASc score stratification predicts patient response to intravenous (IV) thrombolysis.
  • To determine if baseline risk influences outcomes like major improvement or functional status post-thrombolysis.

Main Methods:

  • Analysis of prospectively collected data from 516 AF and non-AF stroke patients treated with IV thrombolysis.
  • Outcomes assessed at 24 hours (NIHSS score) and 3 months (mRS score).
  • Multivariate analysis used to compare outcomes across different CHA2DS2-VASc risk categories.

Main Results:

  • Lower odds of major improvement and excellent outcomes were observed in patients with intermediate (CHA2DS2-VASc=1), moderately high (CHA2DS2-VASc=2), and very high (CHA2DS2-VASc>3) risk scores compared to low-risk (CHA2DS2-VASc=0).
  • Higher odds of deterioration or unfavorable outcomes were seen only in the very high-risk group.
  • A low-risk CHA2DS2-VASc score predicted an effective response to IV thrombolysis.

Conclusions:

  • Prestroke CHA2DS2-VASc score is a significant predictor of IV thrombolysis response in stroke patients.
  • Low-risk patients are more likely to respond effectively, whereas very high-risk patients have a higher likelihood of failed response.
  • Risk stratification using CHA2DS2-VASc may aid in personalizing thrombolytic treatment decisions for stroke patients.

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