Signs of irreversible death

Burned Beyond Recognition

The last sign of irreversible death is very specific. It refers only to patients who die of burns.

This sign is self-explanatory. Once a victim is burned so badly that they’re no longer recognizable, there’s no chance of resuscitation.

Signs of irreversible death

Postmortem Rigidity

There’s a reason dead people are called “stiffs.”

Once the last little bit of energy is used up in muscle cells they get stiff until enzymes created through decomposition begin to break them down. The Latin term is rigor mortis or hard death.

The chemistry is complicated, but rigidity starts soon after death and lasts for days, depending on heat and humidity.

Signs of irreversible death

Postmortem Lividity

When the blood stops flowing, gravity takes over. The Latin term is livor mortis or blue death. Blood settles in the lowest points of the body, which depends on the position the body is in at the time of death.

If someone dies in bed, the purple streaks on their backs—similar in color to bruises—will follow the wrinkles in the sheets and show that blood hasn’t been circulating for quite a while.

Lividity can show up in as little as 15 minutes.

Signs of irreversible death


Once the flesh begins to rot, there’s no possibility of resuscitation.

A word of clarification, however: flesh can die in areas around the body even on a live person. That’s why frostbite turns black.

When decomposition is a sign of death, it means that the entire body has begun to decompose, that the person is not breathing, and the heart is not beating.

Signs of irreversible death


Separation of the head from the body is the worst-case scenario. There is currently nothing medical science can do to put a head back on a body and make it work.

Doctors can reattach toes, fingers, arms, legs, and even penises, but above-the-collar-level separation is a deal breaker.

Signs of irreversible death

5 Signs of Obvious and Irreversible Death

Some patients with cardiac arrest are simply not going to be resuscitated, no matter how hard rescuers try.

Cellular damage gets worse over time as the cells are not fed nutrients or oxygen, and as they build up toxins and carbon dioxide that needs to be removed.

The longer someone stays in cardiac arrest, the less likely they are to be revived with CPR or advanced treatments.

To figure out who is too dead to be saved, emergency responders look for five signs of irreversible death:

  • Decapitation
  • Decomposition
  • Postmortem lividity
  • Postmortem rigidity
  • Burned beyond recognition
Signs of irreversible death

Signs of Irreversible Death

Cardiac arrest is the hallmark of death. It’s the moment when the heart stops effectively pumping blood around to the muscles and tissues of the body, especially the brain.

This is the moment when every patient dies. You might see the term used in official press releases or media accounts (cause of death: cardiac arrest), but that’s like saying the reason someone fell was because of gravity.

Woman bending over a man laying prone on the ground

Cardiac arrest is recognized by the cessation of a pulse and of breathing. Officially, cardiac arrest is considered clinical death, but it can be treated.

With proper CPR and possibly defibrillation, a person in cardiac arrest can sometimes be saved. There is a limit, however. Resuscitation doesn’t always have the potential to work.

Prolonged cardiac arrest or certain types of trauma that are just not survivable are considered insurmountable and attempts to resuscitate the person won’t be successful.

Brain Death

In the event of prolonged cardiac arrest, brain death (also known as biological death) is considered the absolute point of no return.