Board Thread:Anime/Game Discussion/@comment-39300872-20190429125543/@comment-33410639-20191103025628

I think its like this

Buccellati dies from his wounds

Giorno heals Buccellati's body shortly after he dies which lets Buccellati's determnation and resolve allow his soul to go back to his body

however, Buccellati is technically dead so his body no longer functions and withers away like a zombie (which is probably the life force Giorno is talking about)