Don Jay Garrett, Eric Matthews
International Paramedic Practice, Vol. 8, Iss. 1, 04 Apr 2018, pp 14 - 21

Cardiac arrest is a serious medical event with a poor prognosis of survival, at less
than 10% (Zive et al, 2011). Several studies have investigated out-of-hospital cardiac
arrest (OHCA) response, treatment, and outcomes. Cardiac arrest databases such as
the Resuscitation Outcomes Consortium (ROC) and the Cardiac Arrest Registry to
Enhance Survival (CARES) have been created to provide evidence-based findings to
develop emergency medical service (EMS) policies for treatment. The current study
was completed to describe the cardiac arrest characteristics and outcomes of the
EMS provider, American Medical Response (AMR) in Portland, Oregon, United States
(US), for three metropolitan counties of approximately 1.6 million people (US Census
Bureau, 2016a; 2016b; 2016c). The retrospective study described in this article used
the AMR Multiple-EMS Data Systems (MEDS) database to generate data. Between
1 January 2013 and 31 December 2014, AMR responded to 2029 cardiac arrest
events. In total, 45% of these cases were pronounced dead at the scene or untreated,
and 55% were treated by paramedics. The most noteworthy finding was the effect of
cardiopulmonary resuscitation (CPR) on successful return of spontaneous circulation
and survival evidenced by the large differences in odds ratios and bivariate counts
with CPR treatment. The study adds to the current knowledge base of OHCAs and
builds upon existing cardiac arrest registries - particularly within the Portland Oregon
(US) metropolitan area.

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