| CPR | Cardiopulmonary resuscitation |
| CCs | Chest compressions |
| ROSC | Restoration of spontaneous circulation |
| ALS | Advanced life support |
| ETCO2 | End-tidal CO2 |
| OHCA | Out-of-hospital cardiac arrest |
| TVF&R | Tualatin Valley Fire & Rescue |
| EMS | Emergency medical services |
| ROC | Resuscitation outcomes consortium |
| OHSU | Oregon Health & Science University |
| MUV | Medical University of Vienna |
| TI | Transthoracic impedance |
| PPG | Photoplethysmography |
| ABP | Arterial blood pressure |
| AOI | Airway opening index |
| RF | Reversed airflow |
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