Key Points
Question
What is the clinical presentation to emergency medical services among persons with coronavirus disease 2019 (COVID-19)?
Findings
This cohort study of 124 patients with COVID-19 revealed that most patients with COVID-19 presenting to emergency medical services were older and had multiple chronic health conditions. Initial concern, symptoms, and examination findings were heterogeneous and not consistently characterized as febrile respiratory illness.
Meaning
The findings of this study suggest that the conventional description of febrile respiratory illness may not adequately identify COVID-19 in the prehospital emergency setting.
Background
Air travel affords an opportunity to evaluate resuscitation performance and outcome in a setting where automated external defibrillators (AEDs) are readily available.
Methods and Results
The study cohort included people aged ≥18 years with out of hospital cardiac arrest (OHCA) traveling through Seattle‐Tacoma International Airport between January 1, 2004 and December 31, 2019 treated by emergency medical services (EMS). The primary outcomes were pre‐EMS therapies (cardiopulmonary resuscitation, application of AED), return of spontaneous circulation, and survival to hospital discharge. Over the 16‐year study period, there were 143 OHCA occurring before EMS arrival, 34 (24%) on‐plane and 109 (76%) off‐plane. Cardiac etiology (81%) was the most common mechanism of arrest. The majority of arrests were bystander‐witnessed and presented with a shockable rhythm; these characteristics were more common in off‐plane OHCA compared with on‐plane (witnessed: 89% versus 74% and shockable: 72% versus 50%). Pre‐EMS therapies including cardiopulmonary resuscitation and AED application were common regardless of arrest location. Compared with on‐plane OHCA, off‐plane OHCA was associated with greater rates of return of spontaneous circulation (68% versus 44%) and 3‐fold higher rate of survival to hospital discharge (44% versus 15%). All survivors of on‐plane OHCA had AED application with defibrillation before EMS arrival.
Conclusions
When applied to air travel volumes, we estimate 350 air travel‐associated OHCA occur in the United States and 2000 OHCA worldwide each year, nearly a quarter of which happen on‐plane. These events are survivable when early arrest interventions including rapid arrest recognition, AED application, and CPR are deployed.
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