In the AF group, plasma NT-proBNP level was negatively correlated with rLMC score (r = −0.156, P = 0.022) (Figure 3(a)), while it was positively correlated with CTP ischemic volume (r = 0.137, P = 0.045) (Figure 3(b)) and CTP infarct core volume (r = 0.148, P = 0.003) (Figure 3(c)). This evidence concerns the gene NPPB and atrial fibrillation.