@Henryian
I'm very sorry to hear your about the difficulties you are experiencing with your partner after ECT.
ECT is one of those hit or miss therapies, and it is a treatment of last resort when medication and therapy has failed.
I have had ECT, as a last resort, and was warned about memory loss - of course I dont remember the warning.
Everybody responds differently to ECT - in my case, I lost 2 years on either side of the ECT. Meaning I also didn't put down new memories - well very few at first. That's 7 years ago now and there is sort of a black hole around the ECT period in 2014.
Sadly, there is no quantifiable outcome with individuals regarding memory loss. For some, there is little change to memory and they also get better very quickly from severe depression. For others, it can erase past memories permanently and there is no way around it, except to rebuild new ones. For others, memories do return over time.
There is an interesting story about an architect with treatment-resistant depression who underwent ECT. He dramatically recovered from severe depression, and remembered everything about his family and children, but lost all memory of how to be an architect....a decade of being a decent architect, but he could no longer work as he'd lost all his knowledge and expertise.
The point of this story is that ECT affects people differently, and nobody can really predict how much,if any, memory is lost or which types of memory. All you can really do is support your partner as they stabilise, and be patient.
Curiously while memory maybe lost, personality traits aren't. There is a lot of discussion and disagreement about memory loss with ECT in scientific literature, but there is nothing to suggest a person's fundamental personality changes - a normally kind person doesn't become permanently nasty after ECT.
Maybe disorientation and trauma from memory loss could be why she doesn't seem the person she was. You may just have to give her time (a lot of time), and there may also be other factors involved, such as simply ageing and neural damage from mental illness itself. Bipolar disorder plus a long term hospitalisation could also exacerbate her problems with memory and feeling connected to the real world or to you and her family.
Patience may be the catchall term for now.
🙏