Acute cardiac care & resuscitation
Smartphone-activated volunteer responders and bystander defibrillation for out-of-hospital cardiac arrest in private homes and public locations
Authors' conclusion
Bystander defibrillation was significantly more common in private homes and public locations when a volunteer responder arrived before the EMS. The standardized probability of bystander defibrillation increased with longer EMS response times in private homes.
Study context
- Population
- Out-of-hospital cardiac arrest (OHCA) in private homes and public locations, Stockholm and Capital Region of Denmark, 1 September 2017–14 May 20191,029 home, 242 public
- Participants
- 1,271 participants
- Exposure
- Volunteer responder arrival before Emergency Medical Services (EMS) vs no volunteer responder arrival before EMS
- Outcome
- Bystander defibrillation
Methodological detailsStockholm Region of Sweden and Capital Region of Denmark
- Stockholm Region of Sweden and Capital Region of Denmark
Main finding
As reported in the abstract
Private homes
P < 0.001
Public locations
P = 0.030
Observational data: associations, not effects.
Further findings
| Outcome | Volunteer responder before EMS | No volunteer responder before EMS | P value |
|---|---|---|---|
| Bystander defibrillation, initial shockable rhythm (subgroup)Private homes | 52.7 | 11.5% | P < 0.001 |
| Bystander defibrillation, initial shockable rhythm (subgroup)Public locations | 60.0 | 37.8% | P = 0.025 |
| 30-day survival · private homes · not significantly higher | 9.2 | 7.7% | P = 0.41 |
| 30-day survival · public locations · not significantly higher | 40.5 | 35.4% | P = 0.44 |
- Bystander defibrillation, initial shockable rhythm (subgroup): 361 patients with initial shockable rhythm
Bystander defibrillation probability by EMS response time (private homes)
- Standardised probability of bystander defibrillation increased with longer EMS response times in private homes
Original publication
Smartphone-activated volunteer responders and bystander defibrillation for out-of-hospital cardiac arrest in private homes and public locations. Eur Heart J Acute Cardiovasc Care. Published 27 December 2022. doi:10.
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