While no correlation with aortic root diameter existed (group A: q = 0.17, r = 0.4; group AF: q = 0.07, r = 0.57; group AFV: q = 0.6, r = −0.3), in all three groups a significant positive correlation existed between serum NT-proBNP level and ascending aorta diameter (group A: q = 0.007, r = 0.69; group AF: q = 0.002, PCC 0.79; group AFV: q = 0.02, PCC 0.8). Here, NPPB is linked to atrial fibrillation.