US biotechnology company called Bioquark has been given permission to recruit 20 clinically dead patients and attempt to bring their central nervous systems back to life. They hope to eliminate patients’ need to rely on machines by reanimating parts of the upper spinal cord, where the lower brain stem is located, to potentially energize vital body functions like breathing and heartbeats.

https://www.sciencepagenews.com/2019/10/15/scientist-get-green-light-to-bring-back-dead-to-life-with-stem-cells/