Cardiovascular · Topic 9 of 48

Acute Decompensated Heart Failure

Cardiovascular · acute heart failure

Acute Decompensated Heart Failure

Profile the patient (wet or dry, warm or cold), diurese with IV loop diuretics, find the trigger, and keep guideline-directed therapy going.

Key numbers

Give IV loop diuretics promptlyIV dose 1–2.5× oral dose

01 · Defined byProfile congestion and perfusion: wet/dry, warm/cold

Assess every admission for congestion (wet or dry: JVD, crackles, edema, orthopnea) and perfusion (warm or cold: cool extremities, narrow pulse pressure); most patients are warm and wet.

02 · GiveGive IV loop diuretics promptly

Treat significant fluid overload promptly with an IV loop diuretic: a total IV dose equal to 2.5 times the home oral dose diureses more than a 1-times dose; bolus and continuous infusion work equally.

03 · CauseFind the trigger

Look for the precipitant: ACS, uncontrolled hypertension, AF or other arrhythmia, infection, nonadherence to drugs or diet, anemia, thyroid disease, sodium-retaining drugs (NSAIDs) or negative inotropes (verapamil).

Diagnosis & monitoring

Work-up

Check electrolytes and creatinine daily on IV diureticsMonitor potassium, magnesium, sodium and creatinine daily while on IV diuretics; aim to clear congestion fully before discharge, because residual congestion predicts readmission and death.

Do right now

In this order

First moves

Profile congestion and perfusion: wet/dry, warm/cold

→

ECG, chest X-ray, BNP and echo

→

Give IV loop diuretics promptlyIV dose 1–2.5× oral dose

→

Find the trigger

Why each step

Profile congestion and perfusion: wet/dry, warm/coldAssess every admission for congestion (wet or dry: JVD, crackles, edema, orthopnea) and perfusion (warm or cold: cool extremities, narrow pulse pressure); most patients are warm and wet.

ECG, chest X-ray, BNP and echoWork up with ECG (ischemia, arrhythmia), chest radiograph, BNP or NT-proBNP when the diagnosis is unclear, troponin, electrolytes, renal and liver function, and an echocardiogram for LVEF and valves.

Give IV loop diuretics promptlyTreat significant fluid overload promptly with an IV loop diuretic: a total IV dose equal to 2.5 times the home oral dose diureses more than a 1-times dose; bolus and continuous infusion work equally.

Find the triggerLook for the precipitant: ACS, uncontrolled hypertension, AF or other arrhythmia, infection, nonadherence to drugs or diet, anemia, thyroid disease, sodium-retaining drugs (NSAIDs) or negative inotropes (verapamil).

Management

Orders

Cold and wet: start an IV inotrope must knowHypoperfusion with congestion (cold and wet) calls for an IV inotrope such as dobutamine or milrinone to maintain end-organ perfusion, with escalation to the shock pathway if perfusion fails.

Poor diuresis: double dose or add thiazideIf diuresis is inadequate, intensify: higher IV loop doses (often doubling) or a second diuretic such as metolazone — which raises the risk of hypokalemia, hyponatremia and worsening renal function.

IV nitroglycerin if blood pressure allowsWithout hypotension, IV nitroglycerin or nitroprusside may be added to diuretics to relieve dyspnea (Class 2b); vasodilators are most useful in hypertensive pulmonary edema, which is more common with preserved EF.

Use BiPAP for hypoxemic pulmonary edemaNoninvasive positive pressure (CPAP or BiPAP) treats hypoxemic pulmonary edema and lowers LV afterload; intubate for significant CO₂ retention or obtundation.

Start GDMT before dischargeOnce stable, start or advance GDMT in hospital (an ARNI can be started there) and titrate rapidly over the first 6 weeks; beta-blockers start only after congestion has cleared.

Discharge with a diuretic planEvery patient discharged on diuretics needs a plan for adjusting the dose (daily weights, when to call) to cut readmissions.

AF with RVR: cardiovert if unstableTreat rapid AF in decompensated HF: cardioversion if unstable; otherwise slow the rate with an IV beta-blocker or IV digoxin. Avoid diltiazem and verapamil when LVEF is reduced — they worsen HF.

Red flags & don'ts

Avoid harm

Avoid routine morphine avoidMorphine is no longer routine for acute pulmonary edema — observational data link it to worse outcomes; reserve it for palliation.

The rules

Know these

Continue GDMT, including the beta-blocker must knowContinue home GDMT in HFrEF unless there is shock or hypoperfusion; a mild creatinine rise or asymptomatic blood-pressure drop is not a reason to stop diuresis or GDMT. Don't stop an established beta-blocker.

Warm and wet or cold and wet?

Commonly confused

Congestion	Yes — JVD, crackles, edema, orthopnea
Perfusion	Adequate
How common	Most admissions
First treatment	IV loop diuretic; vasodilator if blood pressure allows

More detail

Reference

Show 6 reference facts

Adding IV acetazolamide 500 mg daily to loop diuretics improved decongestion at 3 days (ADVOR) but did not change death or HF readmission.

Give VTE prophylaxis to hospitalized HF patients, e.g., enoxaparin 40 mg subcutaneously once daily (30 mg daily if creatinine clearance < 30 mL/min) or subcutaneous unfractionated heparin.

Inotropes improve hemodynamics but not survival; long-term continuous or intermittent use is harmful except as a bridge to transplant/LVAD or for palliation.

Ultrafiltration is reserved for diuretic-refractory volume overload with cardiorenal syndrome; it is not routine because long-term benefit is unproven.

Patients on sacubitril/valsartan have raised BNP from neprilysin inhibition; use NT-proBNP to assess decompensation.

After a first HF hospitalization, 5-year survival is about 34% and 10-year about 17%; prognosis is poor unless the cause is correctable.

Pearl

Warm and wet is the usual admission — diurese; cold and wet needs perfusion support before the diuretic can work.

Sources · Heidenreich PA et al. 2022 AHA/ACC/HFSA Guideline for the Management of Heart Failure. J Am Coll Cardiol 2022;79:e263–e421 · Merck Manual Professional — Chronic Heart Failure (signs of congestion and poor perfusion) · Felker GM et al. Diuretic Strategies in Patients with Acute Decompensated Heart Failure (DOSE). N Engl J Med 2011;364:797–805 · Merck Manual Professional — Medications for Heart Failure · Merck Manual Professional — Acute Heart Failure · Merck Manual Professional — Pulmonary Edema · Mullens W et al. Acetazolamide in Acute Decompensated Heart Failure with Volume Overload (ADVOR). N Engl J Med 2022;387:1185–1195 · Fonarow GC, Weber JR. Rapid clinical assessment of hemodynamic profiles and targeted treatment of patients with acutely decompensated heart failure. Clin Cardiol 2004;27:1–9 · Merck Manual Professional — Overview of Heart Failure (precipitants of decompensation) · Lovenox (enoxaparin) prescribing information — DailyMed · Starter sheet built from the verified AGACNP fact map (facts reviewed 2026-10-15).