IGHE and atrial fibrillation: As illustrated in Figure 4, total IgE were more strongly correlated with sIgE to AF (r = 0.53, p = 0.01) than IgG to AF (r = −0.03, p = 0.001), although sIgE were correlated with sIgG to AF (r = 0.29, p = 0.003).