FCN3 and heart failure: According to the etiology of heart failure, heart failure was divided into coronary heart disease group, dilated cardiomyopathy group and other, and the relationship between ficolin-3, C5b-9 and NT-proBNP was compared among the three groups, as shown in Table-III.It can be seen from Table-III that there was no statistical difference between the groups, that is, ficolin-3 and C5b-9 have nothing to do with the etiology of heart failure, but are only linked to the severity of heart failure.