NPPB and Hyponatremia: In addition, a hyponatremia (126 mmol/l, normal range: 135–145) and an increase in cardiac markers (troponin I 201.5 pg/ml, normal range: 0–34.2; brain natriuretic peptide BNP 2,782 pg/ml, normal range 10–100; Figure 2A), amylase and lipase (145 U/l and 166 U/l, respectively, normal range 8–65), D-dimer (1.5 mg/l, normal range 0–5), IL-6 (201.6 pg/ml, normal range < 6.4), and ferritin (301 ng/ml, normal range 22–274) were found.