Abstract 121: Contribution of a Short Message Service to Alert Lay Rescuers With AEDs in Out-of-Hospital Cardiac Arrest
Objective: To shorten time to defibrillation, in suspected OHCA the dispatcher sends ambulances and a first responder and recently if available, lay rescuers. A short message service (SMS) alert system has been implemented to alert lay rescuers nearby (<1000 m radius) to assist in resuscitation and perform CPR or direct them to a nearby AED. The value of such SMS alert system must be evaluated.
Methods: We analyzed all 1144 patients with OHCA where a defibrillator was connected from Feb 2010 until Nov 2012 (33 months), in two regions with 1.27 million inhabitants, 12,295 registered lay-rescuers and 1344 registered AEDs. We excluded EMS-witnessed arrests. ECGs from EMS defibrillators and all AEDs were stored and analyzed with dedicated software. Clock drift for each recording was corrected and compared with time of initiation of 112-call. We analyzed the data using ANOVA and Fisher’s exact test.
Results: Key outcomes are shown in the table. In 618 (54%) cases a mean of 36 lay rescuers were activated. In 528 (46%) cases ≥1 AED was activated (mean 3 AEDs). In 142 (12%) cases an AED from a lay rescuer was connected. All responders with AEDs significantly shortened time to defibrillation compared to EMS (P<0.001). Thirteen percent of lay rescuers delivered a shock <6 min. First shock was delivered significantly more <6 min (P=0.01) with lay rescuer AEDs than EMS defibrillators.
Conclusion: In 12% of resuscitations, lay rescuers contributed to early defibrillation with a clinically relevant (and statistically significant) shortening of delay compared to EMS. Lay rescuers directed to public accessible AEDs contributed to early defibrillation.
- © 2013 by American Heart Association, Inc.