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Measuring Post-Stroke Cerebral Edema, Infarct Zone and Blood-Brain Barrier Breakdown in a Single Set of Rodent Brain Samples
Published on: October 23, 2020
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Reperfusion after ischemic stroke is associated with reduced brain edema
Hannah J Irvine1,2, Ann-Christin Ostwaldt1,2, Matthew B Bevers3
11 Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA.
Summary
Improved blood flow after stroke (reperfusion) was linked to reduced brain swelling and midline shift in patients. This suggests reperfusion may mitigate harmful edema, even with modest improvements in perfusion.
Area of Science:
- Neuroscience
- Radiology
- Cardiovascular Medicine
Background:
- Rapid revascularization is crucial for acute stroke treatment.
- Animal studies indicate that reperfusion edema might counteract the benefits of reperfusion therapy.
- Understanding the relationship between reperfusion and edema in human stroke patients is essential.
Purpose of the Study:
- To investigate the association between reperfusion and reperfusion edema in acute stroke patients.
- To quantify the impact of reperfusion on brain swelling and midline shift.
- To determine if reperfusion independently predicts reduced edema.
Main Methods:
- Analysis of patient data from the Echoplanar Imaging Thrombolysis Evaluation Trial (EPITHET) and Mechanical Retrieval and Recanalization of Stroke Clots Using Embolectomy (MR RESCUE) cohorts.
- Measurement of reperfusion percentage using perfusion-weighted imaging lesion volume changes.
- Quantification of midline shift and swelling volume on follow-up MRI scans.
Main Results:
- Reperfusion was significantly associated with less midline shift (Spearman ρ = -0.46 to -0.49, P < 0.001).
- Higher reperfusion correlated with lower swelling volumes (EPITHET: ρ = -0.56, P < 0.001; MR RESCUE: ρ = -0.27, P = 0.026).
- Multivariable analyses confirmed reperfusion as an independent predictor of reduced midline shift and swelling volume.
Conclusions:
- Reperfusion in acute stroke patients is associated with reduced brain edema.
- Even modest improvements in perfusion appear to mitigate brain swelling.
- These findings highlight the importance of successful reperfusion in managing stroke-related edema.
