流程

Death within 28 day (n=1092)

Patients for further selection

patients were diagnosed as \"heart failure\" (n=15354)

Survival within 28 day (n=3880)

The following patiens were excluded:Less than 65-year-old (n=3576)Less than 24 hours of ICU stay (n=1803)More than 28 days of ICU stay (n=64)patients without AF (n=3941)more 30% personal data was missing (n=10)

only inclued the first IUC admission for each patients (998 exclude)