NPPB and aortic valve stenosis: In univariate analysis, older age, high BNP, high blood urea nitrogen and creatinine, presence of preoperative atrial fibrillation (AF), tricuspid AV, classic LF-LG AS, small AV VTI and LVOT VTI, and small aortic annulus were factors significantly associated with MACCE (P < 0.05, for all).