Longest Cardiac Arrest Survival: Audrey Mash’s Story

There is no single reliable answer, because “dead” can mean that a person’s heart has stopped or that death has been declared, and those are not the same as irreversible loss of brain function. A person can sometimes be revived after cardiac arrest, but there is no verified case of someone recovering after irreversible brain death.

One widely reported case is Audrey Mash, who survived a cardiac arrest lasting about six hours after severe hypothermia in the Spanish Pyrenees in 2019. Her case is remarkable, but it should not be treated as a definitive all-time record for every situation described as coming back to life.

Extreme cold can slow the body’s metabolism and reduce the brain’s need for oxygen, potentially extending the time in which resuscitation can succeed. In Mash’s case, rescuers continued resuscitation, and hospital clinicians used a machine to warm and oxygenate her blood while supporting circulation.

That does not mean a person can usually survive for hours without a heartbeat: outcomes depend on factors such as body temperature, how quickly CPR begins, and access to emergency treatment. Even after circulation returns, recovery can vary, and a person may have serious brain or other organ injuries.

If a person is unresponsive and not breathing normally, call 911 immediately, begin CPR, and use an automated external defibrillator (AED) as soon as one is available. Follow the emergency dispatcher’s instructions, and continue CPR until professional help takes over or you are instructed to stop.

Our team also uses “revival” in a very different, figurative sense in our featured product, Reviving the Dead: Bring Your TikTok Videos Back to Life 💥 – The Dead Video Revival Strategy Guide. If you are looking for the TikTok topic rather than a medical explanation, you can explore our guide to reviving a quiet TikTok video.