2.2 Criteria
Inclusion criteria were patients greater than 18 years old with out-of-hospital cardiac arrest (OHCA) and transported to our facility, who were then placed in a resuscitation bay with AV recording capabilities. Patients who had return of spontaneous circulation (ROSC) prior to arrival were included if cardiac arrest recurred within the first 10 minutes of arrival to the ED. Exclusion criteria were patients with traumatic arrest, clinical death prior to arrival, ROSC prior to arrival with no further CPR during the ED stay, no CPR within the first 10 minutes of the visit, pulse detected at first pulse check, primary in-hospital arrest, or failed video capture.