• K B Kern, T P Colberg, C Wunder, C Newton, and M J Slepian.
• Sarver Heart Center, University of Arizona, Tucson, AZ, United States. Electronic address: kernk@email.arizona.edu.
• Resuscitation. 2019 Nov 1; 144: 131-136.

AimEach minute is crucial in the treatment of out-of-hospital cardiac arrest (CA). Immediate chest compressions and early defibrillation are keys to good outcomes. We hypothesized that a coordinated effort of alerting trained local neighborhood volunteers (vols) simultaneously with 911 activation of professional EMS providers would result in substantial decreases in call-to-arrival times, leading to earlier CPR and defibrillation.MethodsWe developed a program of simultaneously alerting CPR- and AED-trained neighborhood vols and the local EMS system for CA events in a retirement residential neighborhood in Southern Arizona, encompassing approximately 440 homes. The closest EMS station is 3.3 miles from this neighborhood. Within this neighborhood, 15 vols and the closest EMS station were involved in multiple days of mock CA notifications and responses.ResultsThe two groups differed significantly in distance to the mock CA event and in response times. The volunteers averaged 0.3 ± 0.2 miles from the mock CA incidences while the closest EMS station averaged 3.4 ± 0.1 miles away (p < 0.0001). Response times (time from call to arrival) also differed. Two volunteers, one bringing an AED, averaged 1 min 38 s ± 53 s in Phase 1, while it took the EMS service an average of 7 min 20 s ± 1 min 13 s to arrive on scene; p < 0.0001.ConclusionLocal neighborhood volunteers were geographically closer and arrived significantly sooner at the mock CA scene than did the EMS service. The approximate time savings from call to arrival with the volunteers was 4-6 min.Copyright © 2019 Elsevier B.V. All rights reserved.

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