The levels of angiogenin, angiotensinogen, CRP, IgG, IL‐1β, IL‐6, kallikrein 5, LOX‐1, MIP‐1α, MMP‐2, MMP‐9, PAI‐I, renin, S100b, Tau, TNF‐α, t‐PA, VEGF‐a, and VE‐cadherin in arterial blood did not change significantly after PFO closure (Figure 3D and Table 4). Here, OLR1 is linked to Patent foramen ovale.