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Researchers compared survival after use of on-site or dispatched automated external defibrillators (AEDs) in consecutive patients with nontraumatic out-of-hospital cardiac arrest (OHCA) in an urban area of the Netherlands. During a 3-year period, 128 patients were treated with AEDs placed at public sites and used by trained lay rescuers (on-site group), 478 were treated with AEDs dispatched by emergency medical services, and 2227 were not treated with AEDs.
In analysis adjusted for confounders, the incidence of neurologically intact survival was 50% in the on-site group versus 17% in the dispatched group. Among neurologically intact patients, 50% in the on-site group received bystander cardiopulmonary resuscitation (CPR) versus 19% in the di…