Acute heart failure: documentation that holds up
"CHF exacerbation" is a phenotype call, and the wrong call hurts the patient: the flash-pulmonary-edema patient needs nitroglycerin and a mask, not a liter of fluid; the cold, hypotensive patient needs a different plan entirely. The defensible chart names the phenotype, documents the ACS and PE workup, and shows the response to therapy.
▸Critical pathway
Original, evidence-based synthesis — the critical diagnoses you cannot miss, the tests that catch them, and the interventions that can’t wait. Apply local protocol and judgment.
- Pulse oximetry, ECG, and IV access; identify and treat the precipitant.
- For respiratory distress with hypertension (flash pulmonary edema): NIV and IV nitrates; for hypotension/cardiogenic shock, consider inotropes/pressors and early cardiology.
- ECG and troponin to detect an ischemic precipitant
- Chest X-ray and BNP; bedside lung/cardiac ultrasound
- Electrolytes and renal function
ACS precipitant
- Trigger
- Chest pain or ischemic ECG changes
- Test
- ECG and serial troponin
- Intervention
- ACS pathway; cardiology for revascularization
Arrhythmia precipitant
- Trigger
- Tachy- or brady-dysrhythmia on the monitor
- Test
- ECG and telemetry
- Intervention
- Rate/rhythm control or pacing as appropriate
Pulmonary embolism
- Trigger
- Pleuritic pain, hypoxia, or unilateral leg swelling
- Test
- Pretest probability then CTPA
- Intervention
- Anticoagulation
Pericardial tamponade
- Trigger
- Hypotension, muffled sounds, distended neck veins
- Test
- Bedside echocardiography
- Intervention
- Pericardiocentesis
Pneumonia / sepsis
- Trigger
- Fever, consolidation, septic physiology
- Test
- Lactate, cultures, chest imaging
- Intervention
- Early antibiotics and resuscitation
Most acute decompensations are admitted; a mild, well-responding exacerbation with a clear trigger may be considered for observation, while cardiogenic shock needs ICU-level care.
01What's at stake
The exam is specific but insensitive, a normal chest x-ray doesn't exclude it (~1 in 5 ADHF patients have no congestion on film), and the precipitant is often the danger — ACS triggers many decompensations, and 70% of heart-failure patients report no chest pain. Discharge is high-risk: a majority of ED-discharged heart-failure patients bounce back, are admitted, or die within three months.
02Phenotypes & can't-miss
- Hypertensive / "flash" pulmonary edema (SCAPE) — abrupt, hypertensive, often preserved EF and not volume overloaded; needs vasodilation/redistribution, not aggressive diuresis.
- Volume-overloaded (warm & wet) — gradual congestion; diuresis plus vasodilation.
- Cardiogenic shock (cold & wet) — hypotension, poor perfusion; needs inotropes/pressors and a reversible-cause hunt.
- Precipitants/mimics: ACS, arrhythmia, PE, infection/sepsis, valvular catastrophe, thyrotoxicosis, anemia, non-compliance.
03Diagnosis
- Rule-in features: PND, orthopnea, prior HF history, JVD, S3 (specific, not sensitive). → ADHF
- BNP/NT-proBNP help when the picture is unclear (BNP <100 unlikely, >500 likely); falsely low in obesity, higher with age/renal disease.
- Lung & cardiac POCUS (B-lines, reduced function, effusion) and CXR — but a clear film doesn't exclude ADHF.
- ECG and troponin in essentially everyone — ACS is the can't-miss trigger even without chest pain.
Skip the typing
Work the case in the Acute Heart Failure Workup — it records the ECG, troponin, BNP, chest imaging, and oxygenation, and assembles an MDM that documents the ACS/PE workup, the phenotype, and the response to therapy.
04Management by phenotype
- Early NIV (CPAP/BiPAP) for respiratory distress — reduces intubation; start early.
- SCAPE/hypertensive: high-dose IV nitroglycerin (afterload reduction) is the workhorse; diuresis is secondary because these patients are often not volume-overloaded — over-diuresis just injures the kidneys.
- Volume overload: IV loop diuretic (consider the home dose, doubled).
- Cardiogenic shock: inotrope (dobutamine) ± pressor (norepinephrine), find and fix the reversible cause; inotropes harm the preserved-EF/overload patient.
- Avoid reflexive morphine (respiratory depression) and rate-limiting agents that worsen failure.
05What to document
06Where charts fail
- Fluid-bolusing the "weak and dizzy" elder who actually has low-output failure.
- Treating flash pulmonary edema as volume overload and over-diuresing into AKI.
- Not documenting the ECG/troponin (ACS) — most HF patients have no chest pain.
- Anchoring on "non-compliance" before excluding ACS, PE, arrhythmia, sepsis, valvular disease.
- Discharging after one dose of Lasix without serial reassessment and close follow-up.
07Sources
- Kosowsky JM, Chan JL. Acutely decompensated heart failure: diagnostic and therapeutic strategies. Emergency Medicine Practice (EB Medicine). 2006;8(12).
- Maisel AS, Krishnaswamy P, Nowak R, et al. Rapid measurement of B-type natriuretic peptide in the emergency diagnosis of heart failure (Breathing Not Properly). N Engl J Med. 2002;347:161-167.
- Heidenreich PA, Bozkurt B, Aguilar D, et al. 2022 AHA/ACC/HFSA guideline for the management of heart failure. Circulation. 2022;145(18):e895-e1032.
- Vital FMR, Ladeira MT, Atallah AN. Non-invasive positive pressure ventilation for cardiogenic pulmonary oedema. Cochrane Database Syst Rev. 2013;(5):CD005351.
Note: the source issue predates the "SCAPE"/warm-cold-wet-dry vocabulary and lung-ultrasound B-line teaching — those reflect current practice; apply current guidance and local protocol.
© 2026 Kim Trinh, MD. All rights reserved. Educational only — synthesized from EB Medicine and primary literature. Synthetic examples. Not medical advice — apply local protocol and judgment.