• Am J Emerg Med · Mar 2024

    Risk of arrhythmia in post-resuscitative shock after out-of-hospital cardiac arrest with epinephrine versus norepinephrine.

    • Sarah Normand, Courtney Matthews, Caitlin S Brown, Alicia E Mattson, Kristin C Mara, Fernanda Bellolio, and Erin D Wieruszewski.
    • Department of Pharmacy, Mayo Clinic Health System, Eau Claire, WI, USA. Electronic address: normand.sarah@mayo.edu.
    • Am J Emerg Med. 2024 Mar 1; 77: 727672-76.

    ObjectiveTo determine the rates of clinically significant tachyarrhythmias and mortality in the management of post-resuscitative shock after return of spontaneous circulation (ROSC) in patients with out-of-hospital cardiac arrest (OHCA) who receive a continuous epinephrine versus norepinephrine infusion.DesignRetrospective cohort study.SettingA large multi-site health system with hospitals across the United States.PatientsAdult patients admitted for OHCA with post-resuscitative shock managed with either epinephrine or norepinephrine infusions within 6 h of ROSC.InterventionsNone.Measurements And Main ResultsBetween May 5th, 2018, to January 31st, 2022, there were 221 patients admitted for OHCA who received post-resuscitative epinephrine or norepinephrine infusions. There was no difference in the rate of tachyarrhythmias between epinephrine and norepinephrine infusion in univariate (47.1% vs 41.7%, OR 1.24, 95% CI 0.71-2.20) or multivariable analysis (OR 1.34, 95% CI 0.68-2.62). Patients treated with epinephrine were more likely to die during hospitalization than those treated with norepinephrine (90.0% vs 54.3%, OR 6.21, 95% CI 2.37-16.25, p < 0.001). Epinephrine treated patients were more likely to have re-arrest during hospital admission (55.7% vs 14.6%, OR 5.77, 95% CI 2.74-12.18, p < 0.001).ConclusionThere was no statistically significant difference in clinically significant cardiac tachyarrhythmias in post-OHCA patients treated with epinephrine versus norepinephrine infusions after ROSC. Re-arrest rates and in-hospital mortality were higher in patients who received epinephrine infusions in the first 6 h post-ROSC. Results of this study add to the literature suggesting norepinephrine may be the vasopressor of choice in post-OHCA patients with post-resuscitative shock after ROSC.Copyright © 2023 Elsevier Inc. All rights reserved.

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