• Resuscitation · Aug 2023

    Observational Study

    Swedish emergency medical dispatch centres' ability to answer emergency medical calls and dispatch an ambulance in response to out-of-hospital cardiac arrest calls in accordance with the American Heart Association performance goals: an observational study.

    • Fredrik Byrsell, Martin Jonsson, Andreas Claesson, Mattias Ringh, Leif Svensson, Gabriel Riva, Per Nordberg, Sune Forsberg, Jacob Hollenberg, and Anette Nord.
    • Center for Resuscitation Science, Department of Clinical Science and Education, Karolinska Institutet, Södersjukhuset, Stockholm, Sweden. Electronic address: fredrik.byrsell@ki.se.
    • Resuscitation. 2023 Aug 1; 189: 109896109896.

    AimTo investigate the ability of Swedish Emergency Medical Dispatch Centres (EMDCs) to answer medical emergency calls and dispatch an ambulance for out-of-hospital cardiac arrest (OHCA) in accordance with the American Heart Association (AHA) performance goals in a 1-step (call connected directly to the EMDC) and a 2-step (call transferred to regional EMDC) procedure over 10 years, and to assess whether delays may be associated with 30-day survival.MethodObservational data from the Swedish Registry for Cardiopulmonary Resuscitation and EMDC.ResultsA total of 9,174,940 medical calls were answered (1-step). The median answer delay was 7.3 s (interquartile range [IQR], 3.6-14.5 s). Furthermore, 594,008 calls (6.1%) were transferred in a 2-step procedure, with a median answer delay of 39 s (IQR, 30-53 s). A total of 45,367 cases (0.5%, 1-step) were registered as OHCA, with a median answer delay of 7.2 s (IQR, 3.6-14.1 s) (AHA high-performance goal, 10 s). For 1-step procedure, no difference in 30-day survival was found regarding answer delay. For OHCA (1-step), an ambulance was dispatched after a median of 111.9 s (IQR, 81.7-159.9 s). Thirty-day survival was 10.8% (n = 664) when an ambulance was dispatched within 70 s (AHA high-performance) versus 9.3% (n = 2174) > 100 s (AHA acceptable) (p = 0.0013). Outcome data in the 2-step procedure was unobtainable.ConclusionThe majority of calls were answered within the AHA performance goals. When an ambulance was dispatched within the AHA high-performance standard in response to OHCA calls, survival was higher compared with calls when dispatch was delayed.Copyright © 2023 The Author(s). Published by Elsevier B.V. All rights reserved.

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