Chest pain / suspected ACS
A streamlined, differential-led presentation for rapid clinical review.
Twenty-second review
- Chest discomfort can result from myocardial ischemia, vascular catastrophe, pulmonary or pleural disease, gastrointestinal irritation, or chest-wall injury.
- Ongoing ischemic symptoms, dynamic ECG change, shock, acute heart failure, neurologic deficit, or tearing pain require time-critical transport.
- Keep gastroesophageal or musculoskeletal pain in the differential; overlapping or concurrent illness remains possible.
- For chest pain / suspected acs, 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.
Aortic emergencyTime-sensitive high-risk possibility
HPI
Clarify exact onset and activity at onset; character/location/radiation; persistent or resolved.
Signs & symptoms
Abrupt severe pain, pulse or neurologic difference, syncope, or malperfusion.
Focused exam
Assess pulse rate, regularity, strength, skin perfusion, JVP, edema, and lung sounds; Compare current function and exercise tolerance with baseline.
Brief pathophysiology
Aortic emergency may cause chest pain / suspected acs through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Aortic catastrophe has no single required vital pattern. Measure pressure and pulses carefully; shock or a new inter-arm difference raises concern but may be absent.
Blood pressure (mmHg)
May be high or lowHypertension may coexist; hypotension suggests rupture, tamponade, or malperfusion.
Heart rate (bpm)
VariablePain may raise rate, while medications or reflexes can blunt it.
Pulse pressure (mmHg)
Compare pulses / armsA calculated pulse pressure is less specific than pulse deficits and appropriate bilateral BP assessment.
MAP (mmHg)
Trend perfusionA falling MAP supports hemodynamic deterioration.
Front-load in the triage report
- Aortic emergency: Abrupt severe pain, pulse or neurologic difference, syncope, or malperfusion.
- Exact onset and activity at onset.
- Character/location/radiation.
Acute coronary syndromeCommon presentation pattern
HPI
Clarify exact onset and activity at onset; character/location/radiation; persistent or resolved.
Signs & symptoms
Pressure, exertional onset, diaphoresis, dyspnea, nausea, or radiation may support ischemia.
Focused exam
Assess pulse rate, regularity, strength, skin perfusion, JVP, edema, and lung sounds; Compare current function and exercise tolerance with baseline.
Brief pathophysiology
Acute coronary syndrome 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
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
- Pressure, exertional onset, diaphoresis, dyspnea, nausea, or radiation may support ischemia.
- Exact onset and activity at onset.
- Character/location/radiation.
GastroesophagealImportant alternative presentation
HPI
Clarify exact onset and activity at onset; character/location/radiation; persistent or resolved.
Signs & symptoms
May reproduce symptoms but does not safely exclude cardiac disease.
Focused exam
Assess pulse rate, regularity, strength, skin perfusion, JVP, edema, and lung sounds; Compare current function and exercise tolerance with baseline.
Brief pathophysiology
Gastroesophageal can resemble chest pain / suspected acs through overlapping symptoms or referred physiology despite a different primary mechanism.
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
- May reproduce symptoms but does not safely exclude cardiac disease.
- Exact onset and activity at onset.
- Character/location/radiation.
Musculoskeletal painImportant alternative presentation
HPI
Clarify character/location/radiation; persistent or resolved; dyspnea, diaphoresis, nausea/vomiting or syncope.
Signs & symptoms
May reproduce symptoms but does not safely exclude cardiac disease.
Focused exam
Compare current function and exercise tolerance with baseline; Assess perfusion, chest wall, bilateral pulses, lung sounds, heart rhythm, signs of DVT, and serial 12-leads.
Brief pathophysiology
Musculoskeletal pain can resemble chest pain / suspected acs through overlapping symptoms or referred physiology despite a different primary mechanism.
What the trend may show
Isolated musculoskeletal injury often leaves central vital signs near baseline. Persistent abnormality should prompt reassessment for hemorrhage, thoracic injury, infection, or a medical cause.
Heart rate (bpm)
May rise with painTachycardia can reflect pain or distress; trend after treatment.
Blood pressure (mmHg)
May rise with painHypotension is not expected in an isolated minor injury.
Respiratory rate (breaths/min)
May rise with painPersistent tachypnea suggests more than a minor isolated injury.
Oxygen saturation (SpO₂)
Usually preservedDesaturation suggests thoracic injury or concurrent disease.
Front-load in the triage report
- May reproduce symptoms but does not safely exclude cardiac disease.
- Character/location/radiation.
- Persistent or resolved?
Findings that should escalate concern
- Ongoing ischemic symptoms, dynamic ECG change, shock, acute heart failure, neurologic deficit, or tearing pain require time-critical transport.
- Aortic emergency: Abrupt severe pain, pulse or neurologic difference, syncope, or malperfusion.
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
- C01: Acute Coronary SyndromeBC Emergency Health Services Handbook
Official BCEHS clinical practice guidance for acute coronary syndrome.
- C05: Acute Aortic DissectionBC Emergency Health Services Handbook
Official BCEHS clinical practice guidance for acute aortic dissection.
Supporting clinical and academic evidence
- Guideline for the Management of Patients With Acute Coronary SyndromesACC/AHA/ACEP/NAEMSP/SCAI
2025 evidence-based acute coronary syndrome recognition and management guidance.
- CEDIS Presenting Complaint List updateCanadian Association of Emergency Physicians
Presenting-complaint terminology and categorization context. It does not establish a prehospital “top 100” ranking.
- 2021 AHA/ACC Guideline for the Evaluation and Diagnosis of Chest PainCirculation · 2021
Structured chest-pain assessment, early ECG, risk stratification, and dangerous alternate diagnoses.