Acute Heart Failure Management

Pharmacological Interventions

Nitrates may be more effective than furosemide alone for severe pulmonary edema, and the combination of nitrate and furosemide therapy is associated with higher frequency of clinical improvement, as noted by the European Society of Cardiology 1, 2
Furosemide can transiently worsen hemodynamics for 1-2 hours after administration, including increased systemic vascular resistance, increased left ventricular filling pressures, and decreased stroke volume 1
The European Society of Cardiology recommends considering oxygen administration in patients with SpO2 <90% and non-invasive ventilation in patients with respiratory distress, as well as intravenous vasodilator therapy as initial treatment in patients with normal or high systolic blood pressure (>110 mmHg) 3, 2
The European Society of Cardiology advises against the routine use of opioids in patients with acute heart failure and does not support the use of dobutamine when pulmonary edema is associated with normal or high systolic blood pressure 4

Furosemide is recommended as the preferred initial diuretic therapy for elderly patients with bilateral lower extremity edema, with an initial dose of 20-40 mg once daily, according to the European Society of Cardiology and the European Heart Journal 5, 6
For diuretic resistance, consider adding a thiazide diuretic or aldosterone antagonist, as recommended by the European Heart Journal 7
Single morning dosing of furosemide maximizes compliance, and the standard regimen for furosemide and spironolactone is a morning dose with a 100 mg:40 mg ratio, which can be increased simultaneously every 3-5 days, as recommended by the American Association for the Study of Liver Diseases 8
Maximum doses for spironolactone and furosemide are 400 mg/day and 160 mg/day, respectively, according to the American Association for the Study of Liver Diseases 8

Monitor response within 6-8 hours and check electrolytes and renal function within 3-5 days of initiation, and be aware that furosemide may transiently worsen hemodynamics for 1-2 hours after administration 1
Watch for electrolyte disturbances, particularly hypokalemia, hyponatremia, and hyperuricemia, as cautioned by the European Heart Journal 7
Monitor for orthostatic hypotension by checking blood pressure in both sitting and standing positions, as advised by the European Society of Cardiology 5
Avoid loop diuretics for ankle edema without signs of heart failure in patients ≥75 years, as recommended by the European Heart Journal 6
Blood pressure should be monitored, and furosemide should be avoided in patients with hypotension or hypovolemia, as advised by the European Society of Nephrology 9

For acute heart failure, the initial IV dose of furosemide should be at least equivalent to the oral home dose, as recommended by the European Heart Association 10
In patients with fluid overload, consider single large-volume paracentesis followed by diuretic therapy, as suggested by the American Association for the Study of Liver Diseases 8
For patients with congenital nephrotic syndrome, the initial dosing of furosemide is 0.5-2 mg/kg per dose up to six times daily, with a maximum of 10 mg/kg per day, according to the European Society of Nephrology 9
Combination diuretic therapy, such as furosemide + hydrochlorothiazide, furosemide + spironolactone, or metolazone + furosemide, can be effective in treating AKI in heart failure patients, as recommended by the European Heart Journal 2

Assess for signs of congestion, such as pulmonary rales, peripheral edema, and elevated jugular venous pressure, to determine the cause of AKI, which can be due to renal venous congestion, hypoperfusion, or nephrotoxic medications 11, 2
For congested patients, IV furosemide is indicated as first-line therapy, with a starting dose of at least equivalent to oral home dose, and a maximum recommended dose of less than 100 mg in the first 6 hours and less than 240 mg in the first 24 hours, as per the European Heart Journal guidelines 11
The treatment approach should involve titrating the dose according to clinical response and fluid status, and transitioning to oral diuretics when clinically stable, with close monitoring of serum creatinine every 1-2 days during active diuresis, as recommended by the European Journal of Heart Failure 12
Manage electrolyte imbalances, such as hypokalemia, hyponatremia, and hyperuricemia, by adjusting ACE inhibitor/ARB dose, adding mineralocorticoid receptor antagonist, or supplementing potassium, and consider allopurinol prophylaxis for hyperuricemia/gout, as recommended by the European Journal of Heart Failure 12