Pediatric seizure
A streamlined, differential-led presentation for rapid clinical review.
Twenty-second review
- Pediatric seizures may be febrile, epileptic, metabolic, toxic, infectious, traumatic, or structural; prolonged activity increases metabolic demand and hypoxia risk.
- Ongoing or recurrent seizure without recovery, focal activity, young infant, meningism, trauma, poisoning, or persistent altered state is high risk.
- Keep syncope or behavioural event in the differential; overlapping or concurrent illness remains possible.
- For pediatric seizure, trends and combinations of findings are more informative than one isolated vital sign.
Compare the clinical patterns
The repeated material is grouped inside each possibility. Open only the condition you need.
Status epilepticusTime-sensitive high-risk possibility
HPI
Clarify age and exact duration; fever and illness symptoms; return to baseline.
Signs & symptoms
Prolonged, focal, recurrent, or associated with persistent abnormality.
Focused exam
Observe before touching; assess appearance, tone, interaction, work of breathing, circulation to skin, hydration, and age-appropriate neurologic response; Use weight-based and age-specific references for treatment decisions.
Brief pathophysiology
Status epilepticus may cause pediatric seizure through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Transient tachycardia and hypoxemia can follow a generalized seizure. Persistent abnormality, fever, recurrent activity, or failure to recover should prompt a search for the cause and complications.
Heart rate (bpm)
Often rises transientlyAutonomic activation commonly causes postictal tachycardia.
Oxygen saturation (SpO₂)
May fall transientlyApnea, obstruction, or hypoventilation can lower saturation.
Blood glucose (mmol/L)
Check earlyHypoglycemia can provoke or mimic seizure; hyperglycemia may be a stress response.
Temperature (°C)
May riseA brief rise may follow seizure; fever raises concern for infection or a provoking illness.
Front-load in the triage report
- Status epilepticus: Prolonged, focal, recurrent, or associated with persistent abnormality.
- Age and exact duration?
- Fever and illness symptoms?
CNS infectionTime-sensitive high-risk possibility
HPI
Clarify fever and illness symptoms; return to baseline; prior seizure history.
Signs & symptoms
Prolonged, focal, recurrent, or associated with persistent abnormality.
Focused exam
Use weight-based and age-specific references for treatment decisions; Time the event; assess age-appropriate responsiveness, temperature, glucose, focal findings, rash, trauma, medication, and illness history.
Brief pathophysiology
CNS infection may cause pediatric seizure through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
CNS infection may produce fever and systemic illness, but classic findings and abnormal vitals can be absent. Altered mental status, rash, shock, or seizures increase urgency.
Temperature (°C)
Often elevatedFever supports infection; normal temperature does not exclude it.
Heart rate (bpm)
May riseTachycardia may reflect fever, pain, or sepsis.
Blood pressure (mmHg)
May fall with sepsisHypotension suggests systemic involvement or shock.
Blood glucose (mmol/L)
Check earlyGlucose disturbance is an important reversible mimic of altered mentation or seizure.
Front-load in the triage report
- CNS infection: Prolonged, focal, recurrent, or associated with persistent abnormality.
- Fever and illness symptoms?
- Return to baseline?
Intracranial injuryTime-sensitive high-risk possibility
HPI
Clarify return to baseline; prior seizure history; trauma or ingestion.
Signs & symptoms
Prolonged, focal, recurrent, or associated with persistent abnormality.
Focused exam
Use weight-based and age-specific references for treatment decisions; Time the event; assess age-appropriate responsiveness, temperature, glucose, focal findings, rash, trauma, medication, and illness history.
Brief pathophysiology
Intracranial injury may cause pediatric seizure through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Transient tachycardia and hypoxemia can follow a generalized seizure. Persistent abnormality, fever, recurrent activity, or failure to recover should prompt a search for the cause and complications.
Heart rate (bpm)
Often rises transientlyAutonomic activation commonly causes postictal tachycardia.
Oxygen saturation (SpO₂)
May fall transientlyApnea, obstruction, or hypoventilation can lower saturation.
Blood glucose (mmol/L)
Check earlyHypoglycemia can provoke or mimic seizure; hyperglycemia may be a stress response.
Temperature (°C)
May riseA brief rise may follow seizure; fever raises concern for infection or a provoking illness.
Front-load in the triage report
- Intracranial injury: Prolonged, focal, recurrent, or associated with persistent abnormality.
- Return to baseline?
- Prior seizure history?
Simple febrileCommon presentation pattern
HPI
Clarify age and exact duration; fever and illness symptoms; return to baseline.
Signs & symptoms
Generalized brief event with full recovery may fit the history.
Focused exam
Observe before touching; assess appearance, tone, interaction, work of breathing, circulation to skin, hydration, and age-appropriate neurologic response; Use weight-based and age-specific references for treatment decisions.
Brief pathophysiology
Simple febrile may explain the presenting symptoms through a common clinical mechanism, while serial assessment checks for complications or an alternate cause.
What the trend may show
Transient tachycardia and hypoxemia can follow a generalized seizure. Persistent abnormality, fever, recurrent activity, or failure to recover should prompt a search for the cause and complications.
Heart rate (bpm)
Often rises transientlyAutonomic activation commonly causes postictal tachycardia.
Oxygen saturation (SpO₂)
May fall transientlyApnea, obstruction, or hypoventilation can lower saturation.
Blood glucose (mmol/L)
Check earlyHypoglycemia can provoke or mimic seizure; hyperglycemia may be a stress response.
Temperature (°C)
May riseA brief rise may follow seizure; fever raises concern for infection or a provoking illness.
Front-load in the triage report
- Generalized brief event with full recovery may fit the history.
- Age and exact duration?
- Fever and illness symptoms?
Known epilepsy-related seizureCommon presentation pattern
HPI
Clarify fever and illness symptoms; return to baseline; prior seizure history.
Signs & symptoms
Generalized brief event with full recovery may fit the history.
Focused exam
Use weight-based and age-specific references for treatment decisions; Time the event; assess age-appropriate responsiveness, temperature, glucose, focal findings, rash, trauma, medication, and illness history.
Brief pathophysiology
Known epilepsy-related seizure may explain the presenting symptoms through a common clinical mechanism, while serial assessment checks for complications or an alternate cause.
What the trend may show
Transient tachycardia and hypoxemia can follow a generalized seizure. Persistent abnormality, fever, recurrent activity, or failure to recover should prompt a search for the cause and complications.
Heart rate (bpm)
Often rises transientlyAutonomic activation commonly causes postictal tachycardia.
Oxygen saturation (SpO₂)
May fall transientlyApnea, obstruction, or hypoventilation can lower saturation.
Blood glucose (mmol/L)
Check earlyHypoglycemia can provoke or mimic seizure; hyperglycemia may be a stress response.
Temperature (°C)
May riseA brief rise may follow seizure; fever raises concern for infection or a provoking illness.
Front-load in the triage report
- Generalized brief event with full recovery may fit the history.
- Fever and illness symptoms?
- Return to baseline?
SyncopeImportant alternative presentation
HPI
Clarify age and exact duration; fever and illness symptoms; return to baseline.
Signs & symptoms
Witness description and recovery help but do not replace physiologic assessment.
Focused exam
Observe before touching; assess appearance, tone, interaction, work of breathing, circulation to skin, hydration, and age-appropriate neurologic response; Use weight-based and age-specific references for treatment decisions.
Brief pathophysiology
Syncope can resemble pediatric seizure through overlapping symptoms or referred physiology despite a different primary mechanism.
What the trend may show
Transient tachycardia and hypoxemia can follow a generalized seizure. Persistent abnormality, fever, recurrent activity, or failure to recover should prompt a search for the cause and complications.
Heart rate (bpm)
Often rises transientlyAutonomic activation commonly causes postictal tachycardia.
Oxygen saturation (SpO₂)
May fall transientlyApnea, obstruction, or hypoventilation can lower saturation.
Blood glucose (mmol/L)
Check earlyHypoglycemia can provoke or mimic seizure; hyperglycemia may be a stress response.
Temperature (°C)
May riseA brief rise may follow seizure; fever raises concern for infection or a provoking illness.
Front-load in the triage report
- Witness description and recovery help but do not replace physiologic assessment.
- Age and exact duration?
- Fever and illness symptoms?
Behavioural eventImportant alternative presentation
HPI
Clarify fever and illness symptoms; return to baseline; prior seizure history.
Signs & symptoms
Witness description and recovery help but do not replace physiologic assessment.
Focused exam
Use weight-based and age-specific references for treatment decisions; Time the event; assess age-appropriate responsiveness, temperature, glucose, focal findings, rash, trauma, medication, and illness history.
Brief pathophysiology
Behavioural event can resemble pediatric seizure through overlapping symptoms or referred physiology despite a different primary mechanism.
What the trend may show
There is no diagnostic vital-sign pattern for a behavioural, functional, or social presentation. Abnormal physiology should be explained and may indicate delirium, toxicity, infection, trauma, or another medical cause.
Temperature (°C)
Screen for medical causeFever or hypothermia suggests infection, exposure, or toxicity.
Blood glucose (mmol/L)
Check when indicatedGlucose disturbance can cause altered behaviour or weakness.
Heart rate (bpm)
Explain abnormalitiesTachycardia may reflect distress but should not be dismissed.
Blood pressure (mmHg)
Compare with baselineHypotension or severe hypertension warrants medical evaluation.
Front-load in the triage report
- Witness description and recovery help but do not replace physiologic assessment.
- Fever and illness symptoms?
- Return to baseline?
Findings that should escalate concern
- Prolonged or recurrent seizure
- Persistent altered LOC
- Meningeal signs
- Infant under 6 months
- Ongoing or recurrent seizure without recovery, focal activity, young infant, meningism, trauma, poisoning, or persistent altered state is high risk.
- Status epilepticus, CNS infection, or intracranial injury: Prolonged, focal, recurrent, or associated with persistent abnormality.
Medication recognition
Continue the clinical pathway
Clinical and academic sources
Curated clinical guidance and peer-reviewed evidence supporting this presentation. Current BCEHS guidance, medical direction, and local policy remain authoritative for practice.
BCEHS Handbook — specific CPGs
Supporting clinical and academic evidence
- CEDIS Presenting Complaint List updateCanadian Association of Emergency Physicians
Presenting-complaint terminology and categorization context. It does not establish a prehospital “top 100” ranking.
- Acute Care Committee statements and practice pointsCanadian Paediatric Society
Canadian pediatric emergency guidance and peer-reviewed clinical practice statements.
- Best practices for the management of febrile seizures in childrenItalian Journal of Pediatrics · 2024
Febrile-seizure recognition, assessment, management, and differentiation from dangerous causes.