Objective:

To analyze the relationship between Tmax + 6-second volumes and functional outcomes, specifically focusing on the predictive value of these volumes in patients with mild acute ischemic stroke.

Approach:

Key Findings:

• 22.9% of patients with mild stroke demonstrated hypoperfusion, indicating substantial tissue at risk, with statistical significance.
• Poor functional outcomes at 90 days were significantly associated with Tmax + 6-second volumes of 15 mL or greater.
• Functional dependence occurred in 26% of patients with volumes ≥ 15 mL compared to 10% with lower volumes, highlighting the clinical relevance.
• Large-vessel occlusion was present in 11.5% of mild stroke patients, emphasizing the need for careful assessment.
• Independent predictors of poor outcomes included perfusion lesion volume ≥ 15 mL, hypertension, and large-vessel occlusion, with adjusted odds ratios provided.

Interpretation:

CT perfusion parameters can identify tissue at risk in patients with mild neurological deficits, aiding in early detection of those at risk for poor outcomes.

Limitations:

• Retrospective design may introduce selection bias, potentially affecting the generalizability of the findings.
• Inclusion limited to patients with available CT perfusion imaging, which may not represent the broader population of mild stroke patients.
• Lack of standardization in perfusion thresholds across imaging platforms could lead to variability in results and interpretations.

Conclusion:

CT perfusion can reveal at-risk tissue in mild strokes, facilitating early identification of patients vulnerable to neurological deterioration.

Sources:

• Neurological Research and Practice
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