Acute anxiety / panic symptoms
A streamlined, differential-led presentation for rapid clinical review.
Twenty-second review
- Panic symptoms arise from acute autonomic arousal and altered threat processing, but dyspnea, chest discomfort, paresthesia, and dizziness overlap with cardiopulmonary and metabolic disease.
- First episode, syncope, focal deficit, exertional symptoms, hypoxia, fever, abnormal ECG, suicidal risk, or persistent physiological abnormality requires broader assessment.
- Keep stimulant use or withdrawal in the differential; overlapping or concurrent illness remains possible.
- For acute anxiety / panic symptoms, 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.
PETime-sensitive high-risk possibility
HPI
Clarify trigger and onset; chest pain, dyspnea or syncope; prior similar episodes.
Signs & symptoms
Persistent abnormal physiology or risk factors increases concern.
Focused exam
Observe behaviour, speech, thought process, perception, orientation, attention, and signs of intoxication, injury, or medical illness; Assess risk using direct questions and collateral information.
Brief pathophysiology
PE may cause acute anxiety / panic symptoms through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Pulmonary embolism may have normal observations. Tachycardia, tachypnea, or hypoxemia increase concern; hypotension identifies hemodynamic compromise rather than being required for diagnosis.
Heart rate (bpm)
May riseTachycardia is common but neither sensitive nor specific.
Respiratory rate (breaths/min)
May riseTachypnea may be an early sign of increased ventilatory demand.
Oxygen saturation (SpO₂)
May fallHypoxemia may occur, but a normal saturation does not exclude PE.
Blood pressure (mmHg)
Often preservedHypotension suggests high-risk PE with obstructive shock.
Front-load in the triage report
- PE: Persistent abnormal physiology or risk factors increases concern.
- Trigger and onset?
- Chest pain, dyspnea or syncope?
ACSTime-sensitive high-risk possibility
HPI
Clarify chest pain, dyspnea or syncope; prior similar episodes; medical and substance causes assessed.
Signs & symptoms
Persistent abnormal physiology or risk factors increases concern.
Focused exam
Assess risk using direct questions and collateral information; Assess triggers, prior pattern, breathing, chest and lung findings, rhythm, neurologic status, substance use, safety, and medical risk.
Brief pathophysiology
ACS may cause acute anxiety / panic symptoms through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Acute coronary syndrome frequently presents without a diagnostic vital-sign pattern. Abnormal observations suggest complications; normal observations do not exclude ischemia.
Blood pressure (mmHg)
High, normal, or lowPain may elevate pressure; hypotension suggests major infarction or complication.
Heart rate (bpm)
High, normal, or lowIschemia, conduction disturbance, medication, and autonomic response all affect rate.
Respiratory rate (breaths/min)
May riseTachypnea can reflect pain, heart failure, or shock.
Oxygen saturation (SpO₂)
Often preservedLow SpO₂ suggests pulmonary edema or concurrent respiratory disease; normal does not exclude ACS.
Front-load in the triage report
- ACS: Persistent abnormal physiology or risk factors increases concern.
- Chest pain, dyspnea or syncope?
- Prior similar episodes?
DysrhythmiaTime-sensitive high-risk possibility
HPI
Clarify prior similar episodes; medical and substance causes assessed; suicidal thoughts or safety risk.
Signs & symptoms
Persistent abnormal physiology or risk factors increases concern.
Focused exam
Assess risk using direct questions and collateral information; Assess triggers, prior pattern, breathing, chest and lung findings, rhythm, neurologic status, substance use, safety, and medical risk.
Brief pathophysiology
Dysrhythmia may cause acute anxiety / panic symptoms through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Rhythm, rate, symptoms, and perfusion determine urgency. A normal blood pressure does not exclude ischemia or a dangerous intermittent rhythm.
Heart rate (bpm)
Rate / rhythm abnormalCharacterize rate, regularity, onset, and ECG rhythm rather than assuming tachycardia.
Blood pressure (mmHg)
May be preserved or lowFalling pressure suggests reduced cardiac output or instability.
MAP (mmHg)
Trend perfusionInterpret with mentation, skin signs, and symptom trajectory.
Oxygen saturation (SpO₂)
Usually preservedAbnormal oxygenation suggests heart failure, ischemia, or another concurrent process.
Front-load in the triage report
- Dysrhythmia: Persistent abnormal physiology or risk factors increases concern.
- Prior similar episodes?
- Medical and substance causes assessed?
AsthmaTime-sensitive high-risk possibility
HPI
Clarify medical and substance causes assessed; suicidal thoughts or safety risk; supports and coping strategies.
Signs & symptoms
Persistent abnormal physiology or risk factors increases concern.
Focused exam
Assess risk using direct questions and collateral information; Assess triggers, prior pattern, breathing, chest and lung findings, rhythm, neurologic status, substance use, safety, and medical risk.
Brief pathophysiology
Asthma may cause acute anxiety / panic symptoms through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Respiratory rate and effort are primary. A falling rate with fatigue, reduced air entry, or altered consciousness can signal impending ventilatory failure rather than improvement.
Respiratory rate (breaths/min)
Often risesTachypnea is common; a late fall with exhaustion is ominous.
Oxygen saturation (SpO₂)
May fallHypoxemia can occur in severe bronchospasm, but ventilation and fatigue also require assessment.
Heart rate (bpm)
Often risesDistress and beta-agonists may increase heart rate.
Blood pressure (mmHg)
Usually preservedHypotension is a late or peri-arrest feature and warrants urgent reassessment.
Front-load in the triage report
- Asthma: Persistent abnormal physiology or risk factors increases concern.
- Medical and substance causes assessed?
- Suicidal thoughts or safety risk?
Metabolic diseaseTime-sensitive high-risk possibility
HPI
Clarify medical and substance causes assessed; suicidal thoughts or safety risk; supports and coping strategies.
Signs & symptoms
Persistent abnormal physiology or risk factors increases concern.
Focused exam
Assess risk using direct questions and collateral information; Assess triggers, prior pattern, breathing, chest and lung findings, rhythm, neurologic status, substance use, safety, and medical risk.
Brief pathophysiology
Metabolic disease may cause acute anxiety / panic symptoms through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Anxiety may cause tachycardia and tachypnea, but it is a diagnosis of exclusion when symptoms are new or severe. Hypoxemia, fever, or hypotension suggests another or concurrent cause.
Respiratory rate (breaths/min)
Often risesRapid breathing is common during panic or hyperventilation.
Heart rate (bpm)
Often risesAutonomic arousal commonly causes tachycardia.
Oxygen saturation (SpO₂)
Usually normalLow saturation is not explained by uncomplicated panic.
Blood pressure (mmHg)
Normal or mildly highA modest rise may occur; hypotension warrants broader assessment.
Front-load in the triage report
- Metabolic disease: Persistent abnormal physiology or risk factors increases concern.
- Suicidal thoughts or safety risk?
- Supports and coping strategies?
PanicCommon presentation pattern
HPI
Clarify trigger and onset; chest pain, dyspnea or syncope; prior similar episodes.
Signs & symptoms
Sudden fear with familiar recurrent pattern and reassuring complete assessment may fit.
Focused exam
Observe behaviour, speech, thought process, perception, orientation, attention, and signs of intoxication, injury, or medical illness; Assess risk using direct questions and collateral information.
Brief pathophysiology
Panic 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
Anxiety may cause tachycardia and tachypnea, but it is a diagnosis of exclusion when symptoms are new or severe. Hypoxemia, fever, or hypotension suggests another or concurrent cause.
Respiratory rate (breaths/min)
Often risesRapid breathing is common during panic or hyperventilation.
Heart rate (bpm)
Often risesAutonomic arousal commonly causes tachycardia.
Oxygen saturation (SpO₂)
Usually normalLow saturation is not explained by uncomplicated panic.
Blood pressure (mmHg)
Normal or mildly highA modest rise may occur; hypotension warrants broader assessment.
Front-load in the triage report
- Sudden fear with familiar recurrent pattern and reassuring complete assessment may fit.
- Trigger and onset?
- Chest pain, dyspnea or syncope?
Acute stress responseCommon presentation pattern
HPI
Clarify chest pain, dyspnea or syncope; prior similar episodes; medical and substance causes assessed.
Signs & symptoms
Sudden fear with familiar recurrent pattern and reassuring complete assessment may fit.
Focused exam
Assess risk using direct questions and collateral information; Assess triggers, prior pattern, breathing, chest and lung findings, rhythm, neurologic status, substance use, safety, and medical risk.
Brief pathophysiology
Acute stress response 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
Anxiety may cause tachycardia and tachypnea, but it is a diagnosis of exclusion when symptoms are new or severe. Hypoxemia, fever, or hypotension suggests another or concurrent cause.
Respiratory rate (breaths/min)
Often risesRapid breathing is common during panic or hyperventilation.
Heart rate (bpm)
Often risesAutonomic arousal commonly causes tachycardia.
Oxygen saturation (SpO₂)
Usually normalLow saturation is not explained by uncomplicated panic.
Blood pressure (mmHg)
Normal or mildly highA modest rise may occur; hypotension warrants broader assessment.
Front-load in the triage report
- Sudden fear with familiar recurrent pattern and reassuring complete assessment may fit.
- Chest pain, dyspnea or syncope?
- Prior similar episodes?
Stimulant useImportant alternative presentation
HPI
Clarify trigger and onset; chest pain, dyspnea or syncope; prior similar episodes.
Signs & symptoms
Substance-related autonomic symptoms may mimic panic.
Focused exam
Observe behaviour, speech, thought process, perception, orientation, attention, and signs of intoxication, injury, or medical illness; Assess risk using direct questions and collateral information.
Brief pathophysiology
Stimulant use can resemble acute anxiety / panic symptoms through overlapping symptoms or referred physiology despite a different primary mechanism.
What the trend may show
Autonomic excess can produce tachycardia, hypertension, hyperthermia, and tachypnea. Marked temperature elevation or deterioration is a time-critical finding.
Heart rate (bpm)
Often elevatedTachycardia is common with sympathetic activation.
Blood pressure (mmHg)
Often elevatedHypertension is common, though collapse or mixed toxicity can lower pressure.
Temperature (°C)
May rise dangerouslyHyperthermia signals severe toxicity and requires urgent management.
Respiratory rate (breaths/min)
Often elevatedTachypnea may reflect agitation, hyperthermia, or metabolic acidosis.
Front-load in the triage report
- Substance-related autonomic symptoms may mimic panic.
- Trigger and onset?
- Chest pain, dyspnea or syncope?
WithdrawalImportant alternative presentation
HPI
Clarify chest pain, dyspnea or syncope; prior similar episodes; medical and substance causes assessed.
Signs & symptoms
Substance-related autonomic symptoms may mimic panic.
Focused exam
Assess risk using direct questions and collateral information; Assess triggers, prior pattern, breathing, chest and lung findings, rhythm, neurologic status, substance use, safety, and medical risk.
Brief pathophysiology
Withdrawal can resemble acute anxiety / panic symptoms through overlapping symptoms or referred physiology despite a different primary mechanism.
What the trend may show
Withdrawal commonly causes autonomic hyperactivity. Fever, hypoxemia, hypotension, or marked altered mentation should not be attributed automatically to withdrawal.
Heart rate (bpm)
Often elevatedTachycardia is common with autonomic activation.
Blood pressure (mmHg)
May riseHypertension may occur; hypotension suggests dehydration or another illness.
Temperature (°C)
May riseTemperature can rise in severe withdrawal; infection must also be considered.
Respiratory rate (breaths/min)
May riseTachypnea can reflect agitation or metabolic stress.
Front-load in the triage report
- Substance-related autonomic symptoms may mimic panic.
- Chest pain, dyspnea or syncope?
- Prior similar episodes?
Findings that should escalate concern
- First episode, syncope, focal deficit, exertional symptoms, hypoxia, fever, abnormal ECG, suicidal risk, or persistent physiological abnormality requires broader assessment.
- PE, ACS, dysrhythmia, asthma, or metabolic disease: Persistent abnormal physiology or risk factors increases concern.
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.
- Self-harm: assessment, management and preventing recurrenceNational Institute for Health and Care Excellence
Evidence-based psychosocial assessment, safety, communication, and risk-management guidance.
- Recognition and acute management of patients with panic attacks in the emergency departmentEmergency Medicine Clinics of North America · 2000
Panic-attack recognition after excluding dangerous medical causes, communication, and acute management.