For a worldly view of this read Time Enough for Love with Lazarus Long.
Remember back in the 60’s when the first heart transplants and artificial hearts were being used. Little known is that the recipients had a “suicide” switch if pain was too great or “something” was not right. It was new territory back then. Can’t doc it but remember reading it.
For an actual transplant... I can’t see it. One could still die in the normal way. A temporary mechanical replacement, POSSIBLY. No more, though, if it ever was.
Yes, sounds very plausible that, back in the 1960s, the technicians and engineers and doctors who designed the first artificial hearts would go to the effort - and accept the legal risk - to include a "suicide switch" in the event that "something" might not be "right." In fact, the investors (universities, etc.) insisted upon it!
I mean: It was in their interest to give the patient that option, right?
Filling out the Death Certificate (cause of death: activation of "suicide switch") was no problem, either, right?
Also, if I recall correctly, the "suicide button" was conveniently located right next to the "recline bed" button.
Regards,