Table 4 Laboratory values of acute heart failure patients admitted to Tikur Anbessa Specialized Hospital, Ethiopia between May 15 to September 12, 2017 (n = 169)

Serum sodium (mEq/L)

Serum sodium ≥135 mEq/L

Serum sodium < 135 mEq/L

Serum potassium (mEq/L)

Normal

Hypokalemia (<  3.55 mEq/L)

Hyperkalemia (>  5.55 mEq/L)

Hemoglobin (g/dL)^a

Hemoglobin ≥12 g/dL

Hemoglobin < 12 g/dL

Hemoglobin < 10 g/dL

Serum creatinine (mg/dL)

Normal serum creatinine ≤1.2

Elevated serum creatinine > 1.2

Blood urea nitrogen (mg/dL)

Less than 43 mg/dL

Elevated ≥43 mg/dL

eGFR (mL/min/1.73m²)

≤14

15 to 29

30 to 59

60 to 89

≥90