• NgJulia Yu XinJYXYong Loo Lin School of Medicine, National University of Singapore, Singapore., Zariel Jiaying Sim, Fahad Javaid Siddiqui, Nur Shahidah, Benjamin Sieu-Hon Leong, Ling Tiah, Yih Yng Ng, Audrey Blewer, Shalini Arulanandam, Shir Lynn Lim, OngMarcus Eng HockMEHDepartment of Emergency Medicine, Singapore General Hospital, Singapore; Health Services and Systems Research, Duke-NUS Medical School, Singapore., and HoAndrew Fu WahAFWPre-hospital & Emergency Research Centre, Health Services and Systems Research, Duke-NUS Medical School, Singapore; Department of Emergency Medicine, Singapore General Hospital, Singapore; National Heart Research Institute Singapore, Nat.
• Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
• Resuscitation. 2022 Jan 1; 170: 266-273.

AimDispatcher-assisted cardiopulmonary resuscitation (DA-CPR) can increase bystander CPR rates and improve outcomes in out-of-hospital cardiac arrest (OHCA). Despite the use of protocols, dispatchers may falsely recognise some cases to be in cardiac arrest. Hence, this study aimed to find the incidence of DA-CPR initiated for non-OHCA cases, its characteristics and clinical outcomes in the Singapore population.MethodsThis was a multi-centre, observational study of all dispatcher-recognised cardiac arrests cases between January to December 2017 involving three tertiary hospitals in Singapore. Data was obtained from the Pan-Asian Resuscitation Outcomes Study cohort. Audio review of dispatch calls from the national emergency ambulance service were conducted and information about patients' clinical outcomes were prospectively collected from health records. Univariate analysis was performed to determine factors associated with in-hospital mortality among non-OHCA patients who received DA-CPR.ResultsOf the 821 patients recognised as having OHCA 328 (40.0%) were not in cardiac arrest and 173 (52.7%) of these received DA-CPR. No complications from chest compressions were found from hospital records. The top diagnoses of non-OHCA patients were cerebrovascular accidents (CVA), syncope and infection. Only final diagnoses of CVA (aOR 20.68), infection (aOR 17.34) and myocardial infarction (aOR 32.19) were significantly associated with in-hospital mortality.ConclusionIn this study, chest compressions initiated on patients not in cardiac arrest by dispatchers did not result in any reported complications and was not associated with in-hospital mortality. This provides reassurance for the continued implementation of DA-CPR.Copyright © 2021 Elsevier B.V. All rights reserved.

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