CT Perfusion Detects Tissue at Risk in Mild Stroke
Perfusion imaging adds prognostic information in patients with low National Institutes of Health Stroke Scale scores.
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By
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Kathryn Wighton
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April 27, 2026
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Clinical Scorecard: CT Perfusion Detects Tissue at Risk in Mild Stroke
At a Glance
| Category | Detail |
|---|
| Condition | Mild Acute Ischemic Stroke |
| Key Mechanisms | CT perfusion imaging to identify hypoperfusion and tissue at risk. |
| Target Population | Patients with mild acute ischemic stroke (NIHSS scores of 5 or less). |
| Care Setting | Multicenter hospitals in Australia and Indonesia. |
Key Highlights
- 22.9% of mild stroke patients showed hypoperfusion with Tmax + 6-second volumes of 15 mL or greater.
- Poor functional outcomes at 90 days correlated with Tmax + 6-second volumes ≥ 15 mL.
- Functional dependence (mRS scores of 3 to 6) occurred in 26% of patients with hypoperfusion vs 10% without.
- Large-vessel occlusion present in 11.5% of mild stroke patients.
- Independent predictors of poor outcomes include hypertension and large-vessel occlusion.
Guideline-Based Recommendations
Diagnosis
- Utilize multimodal imaging including CT perfusion to assess tissue at risk.
Management
- Monitor patients with Tmax + 6-second volumes ≥ 15 mL closely for potential interventions.
Monitoring & Follow-up
- Assess functional outcomes using modified Rankin Scale (mRS) at 90 days.
Risks
- Consider risk factors such as atrial fibrillation and baseline stroke severity in management.
Patient & Prescribing Data
Patients with mild acute ischemic stroke presenting within 24 hours of symptom onset.
Early identification of patients at risk for neurological deterioration is crucial.
Clinical Best Practices
- Implement standardized protocols for CT perfusion imaging to reduce variability.
- Consider patient history and imaging results when assessing risk for poor outcomes.
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