Cardiology
Decompensated heart failure — the essentials
Decompensated heart failure is acute worsening of congestion — dyspnea, orthopnea, weight gain, and edema from fluid overload. The nursing priority is to recognize the cues, position and oxygenate, give the ordered IV loop diuretic safely, and then evaluate whether the diuresis actually worked.
Recognize it (volume overload)
- Worsening dyspnea, orthopnea, paroxysmal nocturnal dyspnea
- Rapid weight gain (e.g. ~3 kg over a few days), bilateral pitting edema
- Crackles, S3 gallop, raised JVD
- Often a trigger: missed diuretic doses, dietary sodium, arrhythmia
LMNOP (updated — M = Monitor)
- L — Lasix
- IV loop diuretic, administered per order (never nurse-selected)
- M — Monitor
- Telemetry, SpO₂, work of breathing, diuresis. Morphine: discouraged, provider-ordered only
- N — Nitrates
- Per order, BP-guided
- O — Oxygen
- Plus upright positioning
- P — Position
- High-Fowler’s, BP-guided
Safe administration & labs
- IV furosemide (standard)
- Push ≤ 20 mg/min
- IV furosemide (high-dose)
- > 120 mg or infusion ≤ 4 mg/min (ototoxicity)
- Potassium
- Normal 3.5–5.0 · report < 3.5 · critical < 3.0 · hold high > 5.5 mmol/L
- Diuresis response target
- ≥ ~150 mL/hr in the first 6 h (reassess at 2–6 h)
Common NGN / NCLEX traps
- Teaching morphine as routine — it signals harm; it is not nurse-initiated
- Giving an ordered nitrate when hypotensive — hold and notify the provider
- Stopping at "gave the diuretic" — the tested skill is evaluating the outcome
- Initiating NIV — anticipate/prepare; initiation is a provider/RT decision
For practicing nurses
What’s changed (if you trained a while ago)
- Morphine is out: in acute HF / cardiogenic pulmonary edema it signals harm (ADHERE: independent predictor of in-hospital mortality, OR ~4.8). The mnemonic’s M is now Monitor, not Morphine.
- GDMT is now four pillars started early together — ACEI/ARNI + beta-blocker + MRA + SGLT2i — not the old slow stepwise "triple therapy."
- SGLT2 inhibitors are now foundational HFrEF therapy (monitor volume, renal function, rare euglycemic DKA).
- IV loop dose principle: the inpatient IV dose is usually at least equal to — often 1–2.5× — the home oral daily dose; an IV dose below the home dose is a cue to question the order.
On the floor (hold parameters & pearls)
- Furosemide — high-alert
- Use a pump for infusions; respect max rate; watch BP, urine output, and hearing (ototoxicity)
- Hold / clarify diuretic
- SBP < 90 mmHg, or K⁺ < 3.0 / ≥ 5.5 mmol/L → hold per protocol and notify
- ACEI / ARB / ARNI
- Hold for SBP < 90, K⁺ ≥ 5.5, or creatinine rise > 0.3 mg/dL in 48 h
- Beta-blocker
- Don’t initiate/up-titrate in acute decompensation; hold for HR < 50–55 or SBP < 90
- Diuretic resistance
- Weight loss < 1 kg/day or inadequate output → notify for dose escalation / thiazide add-on
- Chart it right
- Daily weight same time, same scale, post-void; strict I&O; trend lung sounds + work of breathing
Key references
- 2022 AHA/ACC/HFSA Guideline for the Management of Heart Failure, Circulation, 2022
- 2021 ESC Guidelines for Acute and Chronic Heart Failure, ESC, 2021
- Chioncel et al. — Morphine in acute pulmonary oedema: a signal of harm, Eur J Heart Fail, 2022
- Davis's Drug Guide for Nurses — Furosemide monograph, F.A. Davis, 2024
- Michigan Medicine — Inpatient Diuretic Guideline for Acute Decompensated HF, 2022
Sources: Based on 2022 AHA/ACC/HFSA, 2021 ESC HF guidelines, and Davis’s Drug Guide (2024).
