In suspected out-of-hospital cardiac arrest (OHCA), Skåne County, Sweden has a selective dispatch for first responders (fire-fighters). In addition to dual dispatched ambulances, the first responders are dispatched if the emergency medical dispatcher estimates a time gain in response time.
Study outcomes of shockable rhythm and 30-day survival after OHCA in a selective dispatch system.
Materials and Methods
Data from the Swedish Cardiac Arrest Registry (2010-2016) were merged with emergency medical dispatch data and further divided in two groups: First responders first on scene (FR first) vs. two ambulances dispatched alone (AMB only). McNemar's test was used to analyze the matched pairs by ambulance response response time (±2 min.), age group (18-39, 40-59, 60-79, ≥ 80) and witnessed cardiac arrest (yes/no) for shockable rhythm (primary outcome) and 30-day survival (secondary outcome).