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Abstract
Lazarus syndrome is the spontaneous return of circulation after cessation of cardiopulmonary resuscitation and presumed death. Though rare, with <100 cases reported, it has major clinical and ethical implications. Common mechanisms include auto-PEEP from ventilation, delayed drug circulation, myocardial stunning, and metabolic factors. A 2024 review of 26 cases showed 88% occurred within 10 minutes of CPR termination. Most patients do not survive neurologically intact, though full recovery is documented. Prevention centers on a 10-minute monitored observation period before death certification, ventilator disconnection, and bedside echocardiography. Standardized protocols are essential to avoid premature death declaration and guide family communication.
Lazarus Syndrome: Delayed Return of Spontaneous Circulation After Failed Cardiopulmonary Resuscitation
Background: Lazarus syndrome also termed autoresuscitation refers to the spontaneous return of circulation after cessation of cardiopulmonary resuscitation (CPR) and presumed death. Despite being first described in 1982, the phenomenon remains underreported and poorly understood, with significant ethical, clinical, and medicolegal implications.
Objective: This review aims to summarize current understanding of the pathophysiology, incidence, and clinical characteristics of Lazarus syndrome, and to propose evidence-based recommendations for post-resuscitation monitoring to prevent premature death certification.
Methods: A systematic review of published case reports and retrospective studies from 1982 to 2026 was conducted. Data on patient demographics, duration of CPR, time to ROSC after CPR cessation, and outcomes were extracted and analyzed.
Results: 87 confirmed cases were identified globally. The mean interval between CPR cessation and ROSC was 7.2 minutes, with a range of 10 seconds to 30 minutes. Proposed mechanisms include delayed action of drugs administered during CPR, hyperventilation-induced dynamic hyperinflation, myocardial stunning, and transient asystole due to vagal stimulation. Over 65% of cases had ventilation discontinued prior to ROSC, suggesting auto-PEEP as a major contributor. Neurological outcomes were poor in 78% of patients, though full recovery was documented in 8 cases.