• Anesthesiology · Oct 2010

    Delayed time to defibrillation after intraoperative and periprocedural cardiac arrest.

    • Jill M Mhyre, Satya Krishna Ramachandran, Sachin Kheterpal, Michelle Morris, Paul S Chan, and American Heart Association National Registry for Cardiopulmonary Resuscitation Investigators.
    • Department of Anesthesiology, The University of Michigan Health System, Ann Arbor, Michigan, USA. jmmhyre@umich.edu
    • Anesthesiology. 2010 Oct 1;113(4):782-93.

    BackgroundDelay in defibrillation (more than 2 min) is associated with worse survival in patients with a cardiac arrest because of ventricular fibrillation or pulseless ventricular tachycardia in intensive care units and inpatient wards.MethodsWe tested the relationship between delayed defibrillation and survival from intraoperative or periprocedural cardiac arrest, adjusting for baseline patient characteristics. The analysis was based on data from 865 patients who had intraoperative or periprocedural cardiac arrest caused by ventricular fibrillation or pulseless ventricular tachycardia in 259 hospitals participating in the National Registry of Cardiopulmonary Resuscitation.ResultsThe median time to defibrillation was less than 1 min (interquartile range, <1 to 1 min). Delays in defibrillation occurred in 119 patients (13.8%). Characteristics associated with delayed defibrillation included pulseless ventricular tachycardia and noncardiac admitting diagnosis. The association between delayed defibrillation and survival to hospital discharge differed for periprocedural and intraoperative cardiac arrests (P value for interaction = 0.003). For patients arresting outside the operating room, delayed defibrillation was associated with a lower probability of surviving to hospital discharge (31.6% vs. 62.1%, adjusted odds ratio 0.49; 95% CI 0.27, 0.88; P = 0.018). In contrast, delayed defibrillation was not associated with survival for cardiac arrests in the operating room (46.8% vs. 39.6%, adjusted odds ratio 1.23, 95% CI 0.70, 2.19, P = 0.47).ConclusionsDelays in defibrillation occurred in one of seven cardiac arrests in the intraoperative and periprocedural arenas. Although delayed defibrillation was associated with lower rates of survival after cardiac arrests in periprocedural areas, there was no association with survival for cardiac arrests in the operating room.

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