CRP and atrial fibrillation: Examination of patients’ laboratory values on the admission day shows that in patients who have new-AF/pre-AF with RVR compared to the rest of the patients, the parameters CRP [OR = 1.005 (CI 1.002–1.008); p = 0.002] and PCT [OR = 1.295 (CI 1.048–1.599); p = 0.017] are significantly increased.