Results and conclusions: 88 study patients (mean age 64, 57 ± 14, 42 years, 70, 5% male) had an average blood lactate concentration at admission of 1, 80 ± 0, 71 mmol / l, the lowest and highest values are 0, 7 and 4, 4 mmol / l, respectively, the interquartile range from 25% to 75% is 1, 2 and 2, 3 mmol / l, respectively.