• Resuscitation · Jan 2022

    Longer retrieval distances to the automated external defibrillator reduces survival after out-of-hospital cardiac arrest.

    • Laura Sarkisian, Hans Mickley, Henrik Schakow, Oke Gerke, Simon Michael Starck, Jonas Junghans Jensen, Jacob Eifer Møller, Gitte Jørgensen, and HenriksenFinn LundFLResearch Unit of Cardiology, Department of Cardiology, Odense University Hospital, J.B. Winsløws Vej 4, 5000 Odense C, Denmark. Electronic address: Finn.L.Henriksen@rsyd.dk..
    • Research Unit of Cardiology, Department of Cardiology, Odense University Hospital, J.B. Winsløws Vej 4, 5000 Odense C, Denmark; OPEN, Odense Patient Data Explorative Network, Odense University Hospital, Odense, Denmark. Electronic address: Laura.Sarkisian2@rsyd.dk.
    • Resuscitation. 2022 Jan 1; 170: 44-52.

    AimsTo evaluate and compare survival after out-of-hospital (OHCA), where an automated external defibrillator (AED) was used, in densely, moderately and thinly populated areas. Also, to evaluate the association between AED retrieval distance and survival after OHCA.MethodsFrom 2014 to 2018, AEDs used during OHCA in the region of Southern Denmark were systematically collected. OHCAs were included if the OHCA address was known. OHCAs at nursing homes were excluded. To evaluate population density, a map with 1000 × 1000 meter grid cells was used with each cell color-graded according to the number of inhabitants. Densely, moderately and thinly populated areas were defined as ≥200 inhabitants, 20-199 inhabitants and 0-19 inhabitants per km2, respectively. Primary outcome was 30-day survival.ResultsA total of 423 cases of OHCA were included, of which 207 (49%) occurred in densely populated areas, while 78 (18%) and 138 (33%) occurred in moderately and thinly populated areas, respectively. AED retrieval distances were: densely populated 105 m (IQR 5-450), moderately populated 220 m (IQR 5-450) and thinly populated 350 m (IQR 5-1500) (P < 0.001). Thirty-day survival was 40%, 31% and 34%, respectively (P = 0.3). In a multivariable regression analysis, mortality increased with 10% per 100 m an AED was placed further away from the site of OHCA.ConclusionSurvival after OHCA, where an AED was used, did not seem to differ in thinly, moderately and densely populated areas. The length of the AED retrieval distance, however, was correlated with reduced survival after adjusting for other potentially explanatory variables.Copyright © 2021 Elsevier B.V. All rights reserved.

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