The limited available evidence supports a 2,000-mg-per-day sodium diet and 1.5L per day fluid restriction. Some studies found a benefit in quality of life, NYHA functional class, sleep disturbance, physical activity, edema, BNP and blood pressure. One recent randomized controlled trial study with a small sample size and short duration indicated a tolerance for a sodium range of 1,610mg to 5,750mg per day for the compensated medically-treated heart failure patient. 

• Grade I means there is Good/Strong evidence supporting the statement;
• Grade II is Fair;
• Grade III is Limited/Weak;
• Grade IV is Expert Opinion Only;
• Grade V is Not Assignable.
• High (A) means we are very confident that the true effect lies close to that of the estimate of the effect;
• Moderate (B) means we are moderately confident in the effect estimate;
• Low (C) means our confidence in the effect estimate is limited;
• Very Low (D) means we have very little confidence in the effect estimate.
• Ungraded means a grade is not assignable.