system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How are patients stable during heart transplants?

Obviously requiring a heart to transport blood throughout the body and brain, is a pump or something used as a submission for that?
gpt
They’re put on a bypass machine that is, in effect, a big mechanical heart. It connects to the veins and arteries that connect to the heart itself, so it just has to pump enough to keep the body alive.

And for breathing they’re on a respirator.

So yeah, the machines basically just take over the cardiopulmonary duties of the body durin the surgery.