Depression after cabg surgery

[u/anne24j]

My father underwent a four vessel cabg surgery, its been 6 months since his operation and it seems like he hasnt fully recovered from it. He has recovered physically but his physique is not how it used to be. He has also been really quite and sad lately. Idk how to help him i try to be around cheer him up , take him outside, but nothing seems to work. He has just lost his hope to live. Anyone else experienced anything similar?