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Standard dose epinephrine versus placebo in out of hospital cardiac arrest: A systematic review and meta-analysis
Authors:Hannah Kempton  Ruan Vlok  Christopher Thang  Thomas Melhuish  Leigh White
Affiliation:1. St Vincent''s Hospital, Sydney, Australia;2. Wagga Base Hospital, Wagga, Australia;3. Faculty of Medicine, The University of Queensland, Australia;4. Royal Prince Alfred Hospital, Sydney, Australia;5. Sunshine Coast Hospital and Health Service, Queensland, Australia
Abstract:

Introduction

Out of hospital cardiac arrest (OHCA) is a time critical and heterogeneous presentation. The most appropriate management strategies remain an issue for debate. The aim of this systematic review and meta-analysis was to determine the association of epinephrine versus placebo with return of spontaneous circulation, survival to hospital admission, survival to hospital discharge and neurological outcomes in out of hospital cardiac arrest.

Methods

A systematic review of five databases was performed from inception to August 2018. Only randomised controlled trials were considered eligible for inclusion. The primary outcome was survival to hospital discharge. Secondary outcomes were ROSC, survival to hospital admission, neurological function on discharge and three-month survival. All studies were assessed for level of evidence and risk of bias.

Results

Five randomised controlled trials with 17,635 patients were identified for inclusion. Use of epinephrine was associated with increased ROSC (OR?=?3.10; 95% CI?=?2.16 to 4.45; I2?=?74%; p?p?p?=?0.84) or differences in neurological outcomes (OR?=?0.81; 95% CI?=?0.34 to 1.96).

Discussion

This study was a systematic review and meta-analysis of epinephrine versus placebo in OHCA. The use of epinephrine was associated with improved ROSC and survival to hospital admission. However, use of epinephrine was not associated with a significant difference in survival to hospital discharge, neurological outcomes or survival to 3?months. Further research is required to control for the confounders during inpatient management.
Keywords:Epinephrine  Cardiac arrest  Cardiopulmonary resuscitation  Meta-analysis
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