Fig. 4From: Fibrosis independent atrial fibrillation in older patients is driven by substrate leukocyte infiltration: diagnostic and prognostic implications to patients undergoing cardiac surgeryLuminex analyses of atrial tissue isolates comparing SR and AFib patients with a normal atrial tissue used as reference value. MMP-9 was statistically significant in AFib patients with P < 0.05. Other cytokines highly expressed in AFib patients were MMP-2, MMP-7, VEGF and CCL-2/MCP-1Back to article page