CHF / acute pulmonary edema
A streamlined, differential-led presentation for rapid clinical review.
Twenty-second review
- Acute heart failure raises cardiac filling pressures, causing pulmonary interstitial and alveolar edema, impaired gas exchange, sympathetic activation, and sometimes systemic congestion.
- Severe work of breathing, silent or tiring patient, hypoxia, shock, chest pain, new dysrhythmia, or altered LOC requires rapid escalation.
- Keep copd or pe in the differential; overlapping or concurrent illness remains possible.
- For chf / acute pulmonary edema, 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.
ACSTime-sensitive high-risk possibility
HPI
Clarify acute vs progressive dyspnea; orthopnea/pnd; edema/weight gain.
Signs & symptoms
Ischemia, new murmur, poor perfusion, or hypotension.
Focused exam
Assess pulse rate, regularity, strength, skin perfusion, JVP, edema, and lung sounds; Compare current function and exercise tolerance with baseline.
Brief pathophysiology
ACS may cause chf / acute pulmonary edema 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: Ischemia, new murmur, poor perfusion, or hypotension.
- Acute vs progressive dyspnea.
- Orthopnea/PND.
Severe valve diseaseTime-sensitive high-risk possibility
HPI
Clarify orthopnea/pnd; edema/weight gain; lung sounds.
Signs & symptoms
Ischemia, new murmur, poor perfusion, or hypotension.
Focused exam
Compare current function and exercise tolerance with baseline; Assess position, speech, crackles, wheeze, JVP, edema, perfusion, rhythm, chest pain, and medication adherence.
Brief pathophysiology
Severe valve disease may cause chf / acute pulmonary edema through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Acute heart failure usually presents as respiratory distress with impaired oxygenation; blood pressure may be high, normal, or low and materially changes management and risk.
Respiratory rate (breaths/min)
Usually risesTachypnea and increased work of breathing are common.
Oxygen saturation (SpO₂)
May fallPulmonary edema can impair gas exchange.
Blood pressure (mmHg)
High, normal, or lowHypertension is common, while hypotension suggests poor forward flow or cardiogenic shock.
Heart rate (bpm)
Often risesTachycardia is common but rate-limiting drugs or conduction disease may blunt it.
Front-load in the triage report
- Severe valve disease: Ischemia, new murmur, poor perfusion, or hypotension.
- Orthopnea/PND.
- Edema/weight gain.
Cardiogenic shockTime-sensitive high-risk possibility
HPI
Clarify edema/weight gain; lung sounds; spo2/o2 requirement.
Signs & symptoms
Ischemia, new murmur, poor perfusion, or hypotension.
Focused exam
Compare current function and exercise tolerance with baseline; Assess position, speech, crackles, wheeze, JVP, edema, perfusion, rhythm, chest pain, and medication adherence.
Brief pathophysiology
Cardiogenic shock may cause chf / acute pulmonary edema through a time-sensitive process capable of rapid physiological deterioration.
What the trend may show
Shock can be present before profound hypotension. Trend perfusion, mental status, pressure, and pulse characteristics; the direction varies with cause and treatment.
Blood pressure (mmHg)
May fallRelative change from baseline may be important before absolute hypotension appears.
MAP (mmHg)
May fallA falling MAP supports impaired perfusion but is not the only endpoint.
Heart rate (bpm)
Often risesTachycardia is common; neurogenic, toxic, paced, or medication effects can alter the response.
Pulse pressure (mmHg)
May narrowNarrow pulse pressure can reflect reduced stroke volume, although distributive states may differ.
Front-load in the triage report
- Cardiogenic shock: Ischemia, new murmur, poor perfusion, or hypotension.
- Edema/weight gain.
- Lung sounds.
Acute decompensated heart failureCommon presentation pattern
HPI
Clarify acute vs progressive dyspnea; orthopnea/pnd; edema/weight gain.
Signs & symptoms
Orthopnea, crackles, edema, weight gain, and known ventricular disease support congestion.
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 decompensated heart failure 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 heart failure usually presents as respiratory distress with impaired oxygenation; blood pressure may be high, normal, or low and materially changes management and risk.
Respiratory rate (breaths/min)
Usually risesTachypnea and increased work of breathing are common.
Oxygen saturation (SpO₂)
May fallPulmonary edema can impair gas exchange.
Blood pressure (mmHg)
High, normal, or lowHypertension is common, while hypotension suggests poor forward flow or cardiogenic shock.
Heart rate (bpm)
Often risesTachycardia is common but rate-limiting drugs or conduction disease may blunt it.
Front-load in the triage report
- Orthopnea, crackles, edema, weight gain, and known ventricular disease support congestion.
- Acute vs progressive dyspnea.
- Orthopnea/PND.
COPDImportant alternative presentation
HPI
Clarify acute vs progressive dyspnea; orthopnea/pnd; edema/weight gain.
Signs & symptoms
Wheeze or dyspnea may occur with different lung and risk-factor patterns.
Focused exam
Assess pulse rate, regularity, strength, skin perfusion, JVP, edema, and lung sounds; Compare current function and exercise tolerance with baseline.
Brief pathophysiology
COPD can resemble chf / acute pulmonary edema through overlapping symptoms or referred physiology despite a different primary mechanism.
What the trend may show
Compare with the patient’s baseline and prescribed oxygen target. In confirmed hypercapnic respiratory failure, an SpO₂ target of 88–92% may be appropriate under current guidance.
Respiratory rate (breaths/min)
Often risesTachypnea and increased work of breathing are common during exacerbation.
Oxygen saturation (SpO₂)
May be below 94%Interpret against baseline and the patient-specific oxygen target.
Heart rate (bpm)
May riseTachycardia can reflect distress, hypoxemia, infection, or medication effect.
Temperature (°C)
VariableFever supports infection but its absence does not exclude an infectious trigger.
Front-load in the triage report
- Wheeze or dyspnea may occur with different lung and risk-factor patterns.
- Acute vs progressive dyspnea.
- Orthopnea/PND.
PEImportant alternative presentation
HPI
Clarify orthopnea/pnd; edema/weight gain; lung sounds.
Signs & symptoms
Wheeze or dyspnea may occur with different lung and risk-factor patterns.
Focused exam
Compare current function and exercise tolerance with baseline; Assess position, speech, crackles, wheeze, JVP, edema, perfusion, rhythm, chest pain, and medication adherence.
Brief pathophysiology
PE can resemble chf / acute pulmonary edema through overlapping symptoms or referred physiology despite a different primary mechanism.
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
- Wheeze or dyspnea may occur with different lung and risk-factor patterns.
- Orthopnea/PND.
- Edema/weight gain.
Findings that should escalate concern
- Severe work of breathing, silent or tiring patient, hypoxia, shock, chest pain, new dysrhythmia, or altered LOC requires rapid escalation.
- ACS, severe valve disease, or cardiogenic shock: Ischemia, new murmur, poor perfusion, or hypotension.
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
- 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.
- Cardiogenic Pulmonary Edema in Emergency MedicineAdvances in Respiratory Medicine · 2023
Recognition, respiratory support, preload/afterload physiology, and emergency treatment of cardiogenic pulmonary edema.