Acute Stroke Protocol for Pediatric Patients
Pediatric patients (≤18 years) presenting with acute stroke symptoms should be evaluated using a rapid stroke alert protocol that includes immediate neurological assessment (ideally within 15 minutes), urgent MRI as the preferred first imaging modality, and supportive care measures including fever control, oxygen supplementation for hypoxemia, blood pressure management, and glucose normalization. 1, 2, 3
Initial Assessment and Activation
Stroke Alert Activation
- Activate a multidisciplinary stroke alert team immediately when a child presents with acute neurological deficit 4, 5, 6
- Target neurological evaluation within 15 minutes of emergency department arrival 6
- Document Pediatric National Institutes of Health Stroke Scale (PedNIHSS) score—this has become standard practice with 82% compliance in recent protocols 5
Important caveat: Approximately 40% of pediatric stroke alerts represent true stroke, transient ischemic attack (TIA), or other neurological emergencies (meningitis, encephalitis, intracranial neoplasm), while the remainder are stroke mimics (complex migraine 17%, seizure 15%) 6. This high yield justifies aggressive protocol activation.
Neuroimaging Strategy
First-Line Imaging
MRI should be the first neuroimaging study performed in stable pediatric stroke patients 2, 5, 3
- Use abbreviated/rapid MRI stroke protocols to overcome traditional challenges in pediatric patients 2
- MRI has high sensitivity for ischemic stroke and helps identify stroke mimics 2
- 76-78% of pediatric centers now use MRI as first-line imaging 5, 6
- Target time from ED arrival to MRI: median 94 minutes (though faster is better) 6
Alternative Imaging
- Non-contrast CT is acceptable if MRI is not readily available or the patient is unstable 2
- CT perfusion or MR perfusion imaging should be available for potential thrombectomy candidates 1, 4
- Median time to CT when used: 59 minutes 6
Critical point: In children with stroke-like symptoms and negative non-contrast CT, antithrombotic therapies are typically not warranted given the high rate of stroke mimics 2. MRI is needed for definitive diagnosis.
Immediate Supportive Care (Class I Recommendation)
All pediatric stroke patients require the following supportive measures 1:
Mandatory Interventions
- Control fever aggressively—experimental evidence shows fever worsens brain injury 1
- Correct hypoxemia with supplemental oxygen (but oxygen is NOT beneficial in non-hypoxemic patients) 1
- Manage systemic hypertension appropriately
- Normalize serum glucose levels—both hyper- and hypoglycemia should be corrected 1
- Treat dehydration and anemia 1
- Stop clinical or electrographic seizures immediately 1
What NOT to Do (Class III Recommendations)
- Do NOT use supplemental oxygen in children without hypoxemia 1
- Do NOT give prophylactic antiepileptic medications in the absence of clinical or electrographic seizures 1
- Do NOT use therapeutic hypothermia outside of clinical trials 1
Acute Recanalization Therapy
Consultation and Decision-Making
Consult with clinicians experienced in pediatric stroke to determine optimal imaging and treatment strategies 2
- Complete emergent advanced neuroimaging within 1 hour of arrival for children who may benefit from specific stroke therapies 2
- The 2026 AHA/ASA guidelines now include pediatric-specific recommendations for acute interventional management 7, 3
Treatment Options
Based on institutional experience 4:
- Intravenous tissue plasminogen activator (IV-tPA) has been used at the majority of pediatric stroke centers
- Mechanical thrombectomy is available and utilized at most major pediatric centers
- Treatment decisions should be made in consultation with pediatric stroke specialists
Important limitation: While these therapies are being used, there remains no clear universal recommendation for thrombolytics in children—decisions must be individualized based on institutional protocols and expert consultation 2.
Anticoagulation Protocols (When Indicated)
If anticoagulation is deemed necessary for secondary prevention or specific stroke etiologies, use pediatric-specific dosing 1:
Unfractionated Heparin (UFH)
- Loading dose: 75 units/kg IV over 10 minutes
- Maintenance infusion:
- Infants <1 year: 28 units/kg/hour
- Children >1 year: 20 units/kg/hour
- Target aPTT: 60-85 seconds (reflecting anti-factor Xa level 0.35-0.70)
- Check aPTT 4 hours after loading and after each rate change 1
Low Molecular Weight Heparin (LMWH)
Enoxaparin (age-dependent dosing) 1:
- <2 months: 1.5 mg/kg every 12 hours (treatment dose)
2 months: 1.0 mg/kg every 12 hours (treatment dose)
Warfarin
- Day 1: 0.2 mg/kg orally (if INR 1.0-1.3)
- Target INR: 2.0-3.0
- Adjust based on specific protocol with frequent INR monitoring 1
Special Considerations
High-Risk Populations
Children with sickle cell disease and congenital heart disease require specific attention to both acute management and primary stroke prevention 1
Vascular Imaging
- Moyamoya disease can be identified with MRA, but conventional angiography (CA) more accurately delineates anatomy for presurgical planning 1
- In infants <1 year, the risk of CA is increased due to small vessel size—weigh risks carefully and consider MRA/CTA as alternatives 1
Recurrence Risk
10-25% of children experience a second stroke, emphasizing the importance of both acute management and long-term secondary prevention strategies 1
Quality Improvement Metrics
Successful pediatric stroke protocols demonstrate 5:
- Increased PedNIHSS documentation (42% → 82%)
- Increased MRI as first imaging (68% → 78%)
- Maintained high detection rate of true neurological emergencies (37-40%)
- Median time to imaging <2 hours
The evidence strongly supports implementing and maintaining dedicated pediatric acute stroke protocols, as they identify stroke or other neurological emergencies requiring specific management in approximately 40% of activations 5, 6.