NPPB and heart failure: Multivariate Logistics regression analysis results showed that blood glucose gap, NTproBNP, AngII, hs-cTn, SCR, LVEF, and hemoglobin were independent influencing factors on the prognosis of acute heart failure patients during the vulnerable period of heart failure (P<0.05), ROC analysis results showed that the area under the curve of the value of blood sugar gap in the prognosis of acute heart failure patients during the vulnerable period of heart failure was 0.6071,(95% CI: 0.3107~0.9035), Youden=0.89, at this time, the sensitiv ity was 92.8 and the specificity was 97.1.