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Lazarus Syndrome | |
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Other names | Lazarus phenomenon, Lazarus heart, autoresuscitation after failed cardiopulmonary resuscitation |
Specialty | Cardiology |
Lazarus syndrome (the Lazarus heart), also known as autoresuscitation after failed cardiopulmonary resuscitation, [1] is the spontaneous return of a normal cardiac rhythm after failed attempts at resuscitation. It is also used to refer to the spontaneous return of cardiac activity after the patient has been pronounced dead. [2] Its occurrence has been noted in medical literature at least 38 times since 1982. [3] [4] It takes its name from Lazarus who, according to the New Testament, was raised from the dead by Jesus. [5]
Occurrences of the syndrome are extremely rare, and the causes are not well understood. One hypothesis for the phenomenon is that a chief factor (though not the only one) is the buildup of pressure in the chest as a result of cardiopulmonary resuscitation (CPR). The relaxation of pressure after resuscitation efforts have ended is thought to allow the heart to expand, triggering the heart's electrical impulses and restarting the heartbeat. [2] Other possible factors are hyperkalemia or high doses of adrenaline. [5]
Velma Thomas, 59, of Nitro, West Virginia, United States holds the record time for recovering from clinical death. In May 2008, Thomas went into cardiac arrest at her home. Medics were able to establish a faint pulse after eight minutes of CPR. Her heart stopped twice after arriving at the hospital and she was placed on life support. Doctors attempted to lower her body temperature to prevent additional brain injury. She was declared clinically dead for 17 hours after doctors failed to detect brain activity. Her son, Tim Thomas, stated that "her skin had already started hardening, her hands and toes were curling up, they were already drawn". She was taken off life support and funeral arrangements were in progress. However, ten minutes after being taken off life support, she revived and recovered. [17] [18]
The Lazarus phenomenon raises ethical issues for physicians, who must determine when medical death has occurred, resuscitation efforts should end, and postmortem procedures such as autopsies and organ harvesting may take place. [2]
Medical literature has recommended observation of a patient's vital signs for five to ten minutes after cessation of resuscitation before certifying death. [5]