The PD-1 with PD-L1 Axis Is Pertinent with the Immune Modulation of Atrial Fibrillation by Regulating T Cell Excitation and Promoting the Secretion of Inflammatory Factors

Table 3

Changes of PD-1 expression on CD4+ and CD8+ T lymphocytes in external blood of two groups .

Group	Cases	CD4^+ PD-1	CD8^+ PD-1
AF	45
Control	45
value		38.387	1.910
value		<0.001	0.060