Fluid Intake Recommendations for Patients with Heart Failure with Reduced Ejection Fraction (HFrEF)

General Fluid Intake Guidelines

The European Society of Cardiology recommends that fluid restriction of 1.5-2 L/day should only be considered in patients with severe heart failure to relieve symptoms and congestion, while routine fluid restriction is not recommended for patients with mild to moderate symptoms 1, 2
For patients with mild to moderate symptoms, there is no benefit to routine fluid restriction, according to the European Journal of Heart Failure 1
Weight-based fluid restriction (30 mL/kg body weight, or 35 mL/kg if body weight >85 kg) is more reasonable than fixed restrictions and may cause less thirst, as suggested by the European Journal of Heart Failure 1

Restriction of hypotonic fluids to 1.5-2 L/day may improve hyponatremia, as recommended by the European Journal of Heart Failure 1

Patients should monitor and record daily weight to recognize rapid weight gain, according to the European Journal of Heart Failure 1, 2
A sudden unexpected weight gain of >2 kg in 3 days should trigger an increase in diuretic dose and/or alert the healthcare team, as suggested by the European Journal of Heart Failure 1, 2
Low-dose loop and thiazide diuretics should be considered for symptomatic patients to improve heart failure symptoms, according to the European Heart Journal 3

When traveling to hot climates, an additional intake of 0.5-1.0 L per day of non-alcoholic drinks is recommended, as suggested by Nature Reviews Cardiology 4
Patients should regularly check their body weight during travel and adjust diuretic doses and fluid intake accordingly, according to Nature Reviews Cardiology 4

Patients should be educated on how to monitor and recognize signs and symptoms of fluid overload, as recommended by the European Journal of Heart Failure 1, 2
Patients should understand when and how to notify healthcare providers about changes in symptoms or weight, according to the European Journal of Heart Failure 1
Patients should be taught how to use flexible diuretic therapy if appropriate and recommended, as suggested by the European Journal of Heart Failure 1

Fluid restriction should not be implemented in isolation but as part of comprehensive heart failure management, according to the European Journal of Heart Failure 5

The American College of Cardiology recommends daily weight monitoring at the same time each day, accompanied by regular assessment of volume status through clinical examination and monitoring of serum electrolytes, BUN, and creatinine during active diuretic titration 6, 7
Guideline-directed medical therapy, including ACE inhibitors/ARBs, beta-blockers, mineralocorticoid receptor antagonists, and SGLT2 inhibitors, should be implemented alongside optimized diuretic therapy 8, 6, 7

The American College of Cardiology suggests that patients with heart failure should increase fluid intake by 17-34 oz (0.5-1.0 L) per day of non-alcoholic beverages when traveling to hot climates, while regularly checking body weight and adjusting diuretic doses accordingly, although this specific recommendation is not directly cited, the importance of adjusting fluid intake based on individual needs is emphasized 6, 7