Doctors Baffled: Heart Beats Again After Death Call

The Lazarus syndrome, also known as autoresuscitation, is an extremely rare medical phenomenon where a patient's heart spontaneously begins beating again after all resuscitation efforts have concluded and they have been declared deceased. The name is derived from the biblical story of Lazarus being raised from the dead.

First described in scientific literature in 1982, the term 'Lazarus phenomenon' was introduced in 1993. As of the end of 2022, only 76 cases have been published across 27 countries, indicating its rarity. It can affect individuals of all ages, though most do not survive long-term.

A leading theory for Lazarus syndrome involves pressure changes within the chest during cardiopulmonary resuscitation (CPR). When CPR stops, a sudden drop in intrathoracic pressure, possibly related to auto-PEEP (trapped air pressure), may allow the heart to restart. Other potential factors include delayed drug effects, hypothermia, severe electrolyte imbalances, or drug overdoses.

Due to this phenomenon, some hospitals now advocate for a waiting period of at least ten minutes after discontinuing resuscitation before a death pronouncement. This cautious approach ensures that spontaneous circulation can be observed if it occurs, and it has also prompted critical discussions regarding organ donation and the precise definition of death.