CRP and atrial fibrillation: On further investigation, atrial fibrillation had normal ventricular response, lactate was 3.0, procalcitonin (PCT) was 162 ng/mL, C-reactive protein (CRP) was 60.8 mg/dL, and N-terminal pro-brain natriuretic peptide (NT-proBNP) was > 9000, with urea at 281 mg/dL and creatinine at 5.69 mg/dL.