not really. One of the most riveting er stories I heard was of gal who came in with a quivering heart they were repeatedly trying to jolt into a regular rhythm without much success. Meanwhile they were having difficulty starting a line. Finally got in and pulled back some blackish ropey substance. It suddenly dawned on the team that they were pulling back old clotted blood.
They realized that the gal had been dead quite a while but she had so much crack in her that her heart cells were continously being excited and polarizing c. Bodies do weird things. Open eyes don’t necessarily mean seeing or even alive.
Well at least they tried to save her. It’s sort of the opposite. No real harm in trying to revive a dead person. Just wasted time and tools. Lots of harm pronouncing someone dead without confirming it. Pulse could be too weak, stethoscope prone to human error etc.
Not sure if the EMT had her on an EKG or not. Seems fairly standard, or at least a blood pressure monitor... but I don’t know how they do things in Detroit :-)