Abstract 204: Incidence Rate of Shockable Cardiac Arrest Varies Considerably Among Facilities
Introduction: Despite wide proliferation of AEDs in public facilities in Japan, only ∼1% of patients with out-of-hospital cardiac arrest receive defibrillation attempts using on-site AEDs. In the decision-making process as to what specific facilities may merit the placement of on-site AEDs, each facility needs to estimate a site-specific incidence rate of cardiac arrest. We hypothesized that the incidence of cardiac arrest per person-year differs significantly across types of facilities.
Methods: Locations of cardiac arrest from 2003 through 2010 were abstracted from the database of the Fire Department of Nagoya City (population of 2.2 million; ∼2,000 cardiac arrests annually). The locations of cardiac arrests were tallied and grouped into 36 facility categories consistent with the Fire Service Act, and the number of cardiac arrests within each category was determined. Data on the number of visitors/workers/residents for each category were obtained from governmental databases and annual financial reports. The incidence rate was calculated as the number of cardiac arrest per 1 billion person-years.
Results: In 18 facility categories, the database for cardiac arrest and the database for numbers of visitors/workers/residents coincided in the categorization rules. For each of the categories, the incidence rate of cardiac arrest with initial shockable rhythm was calculated (the top 7 categories are shown in the table).
Conclusions: The incidence rate of shockable cardiac arrest varies considerably among facilities. Such variation in the incidence rate may reflect divergence among facilities in terms of characteristics of visitors/workers/residents, average duration of stay, intensity of physical or emotional activities, etc. These incidence rates, combined with the expected numbers of visitors/workers/residents, may be used to estimate anticipated numbers of shockable cardiac arrests per facility and the need for placing on-site AEDs.
- © 2012 by American Heart Association, Inc.