Background and Purpose: The role played by post-stroke inflammation after an ischemic event in limiting functional recovery remains unclear. One component of post-stroke inflammation is disruption of the blood-brain barrier (BBB). This study examines the relationship between post-stroke BBB disruption and functional outcome. >bold<>italic<Methods:>/italic<>/bold< Acute stroke patients treated with thrombolysis underwent magnetic resonance imaging scanning 24 h and 5 days after their initial event. BBB permeability maps were generated from perfusion weighted imaging. Average permeability was calculated in the affected hemisphere. Good functional outcome, defined as a modified Rankin score of 0 or 1, was compared with average permeability using logistic regression. >bold<>italic<Results:>/italic<>/bold< Of the 131 patients enrolled, 76 patients had the necessary data to perform the analysis at 24 h, and 58 -patients had data for the 5-day assessment. Higher BBB permeability measured at 24 h (OR 0.57; 95% CI 0.33-0.99, >italic
/italic< = 0.045) and at 5 days (OR 0.24; 95% CI 0.09-0.66, >italic
/italic< = 0.005) was associated with worse functional outcome 1-3 months after the acute ischemic stroke. For every percentage increase in BBB disruption at 5 days, there was a 76% decrease in the chance of achieving a good functional outcome after stroke. Multivariate analysis found this to be independent of age, stroke volume, or clinical stroke severity. >bold<>italic<Conclusions:>/italic<>/bold< Post-stroke BBB disruption appears to be predictive of functional outcome irrespective of stroke size.
ASJC Scopus subject areas
- Clinical Neurology
- Cardiology and Cardiovascular Medicine