My father is 47 years old and currently under sedation after 5 unexplained cardiac arrest's throughout Wednesday. Doctors have attempted to bring him out of sedation 3 times since Thursday evening however he has experienced further distress and has been sedated again. it has been nearly 3 days now and he is showing no signs of recovery. before this he was generally a very healthy man and had no previous problems with his heart.
what are the survival rates after so long?
thank you to anyone in advance that can help me understand this better.