Introduction: Since March, the CDC has reported weekly excess deaths of up to 40% in the US. Spikes in excess deaths were associated with spikes in COVID-19 cases. In Texas, 55% of excess deaths from March 1 to May 30, 2020 were unattributed to COVID-19. One possible source of this unaccounted excess death is out-of-hospital cardiac arrest, which corresponds to a notable decline in hospitalizations for acute cardiovascular events. Objective: To compare the number of out-of-hospital cardiac arrest (OOHCA) and dead-on-scene cases in Dallas, Texas in years prior to and during the COVID-19 pandemic. Methods: The Dallas-Fort Worth Center for Resuscitation Research Cardiac Arrest Registry provided data for this IRB-approved study. Eligible cases were non-traumatic OOHCAs who received cardiopulmonary resuscitation (CPR) from emergency medical services (EMS) providers. We compared monthly case numbers in 2017, 2018, and 2019 with case numbers in 2020 at the time of the COVID-19 pandemic in Dallas, TX. Additionally, we compared the numbers of non-traumatic deaths (declared dead on scene without receiving CPR from EMS providers) in the same timeframes. Results: While total counts of out-of-hospital cardiac arrest during the months of March to June decreased from 2017 to 2019 by 9.2% and 1.2% respectively, the number of cardiac arrest cases rose dramatically by 47.9% in 2020 (p < 0.05).(Table) The percentage of OOHCAs with an initial rhythm of asystole increased as well, from 50.1% in 2018 and 2019 to 60.4% in 2020. The total number of dead-on-scene cases was also higher in March to June 2020 than in 2017 to 2019 (NS). Conclusion: Increased out-of-hospital cardiac arrest is likely contributing to the unattributed excess deaths noted during the months of the COVID-19 pandemic in Dallas, TX. The rise in cases may be indirectly attributable to COVID-19 as cardiovascular events go untreated or treated too late.
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