PTPRC and Paroxysmal atrial fibrillation: Also the pre-operative CRP blood levels did not differ significantly between paroxysmal and long-standing persistent/permanent AF, but showed a moderate positive correlation with the CD3+ cell density in paroxysmal AF (r = 0.43, p = 0.058) and a moderate positive correlation with the CD45+ cell density in long-standing persistent/permanent AF (r = 0.38, p = 0.039).