| OHCA | Out-of-hospital cardiac arrest |
| ROSC | Return of spontaneous circulation |
| ALS | Advanced life support |
| EMS | Emergency medical service |
| ED | Emergency department |
| COVID-19 | Coronavirus disease 2019 |
| STROBE | Strengthening the Reporting of Observational Studies in Epidemiology |
| CPR | Cardiopulmonary resuscitation |
| VF | Ventricular fibrillation |
| pVT | Pulseless ventricular tachycardia |
| PEA | Pulseless electrical activity |
| IV | Intravenous |
| PCI | Percutaneous coronary intervention |
| TTM | Targeted temperature management |
| OR | Odds ratio |
| CI | Confidence interval |
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