[First responder defibrillation in the LAGO-die Therme--results and experiences].

The use of automated external defibrillator (AED) by persons other than paramedics and emergency medical technicians is advocated by several US- and European organizations. However, at the present time it is still unclear to identify public places with a high incidence of out-of-hospital cardiac arrest. There are few data on the potential impact of public access defibrillators on survival after out-of-hospital cardiac arrest in sporting arenas or water parks. Therefore, we studied prospectively incidence of out-of-hospital cardiac arrest in the LAGO-die Therme in Herne. This is one of the most important swimming parks in Europe and member of the European Waterpark Association EWA. Eight AEDs were placed in the waterpark LAGO-die Therme. The locations where the defibrillators were stored were chosen to make possible a target interval of 60 seconds from collapse to first defibrillation. Twenty waterpark officers were instructed in cardiopulmonary resuscitation and in the use of the AED. During November 16, 2001 and December 31, 2004, 2.05 Mio. visitors were counted in the LAGO. Out-of-hospital cardiac arrest occurred in none of them. AED were used in two visitors with non arrhythmogenic syncope, no shock was delivered. Questionaires were done in 588 visitors (336 males, 252 females, mean age 38+21 years) in 2002 and in 579 visitors (322 males, 257 females, mean age 37+/-25 years) in 2004. In 2002, 77% of the visitors noticed the AED and, therefore, 49% performed more sporting activities. In addition, in 2004, AED was noticed by 480 visitors (83%) and 277 visitors (48%) did more sporting activities. There were no significant differences between 2002 and 2004 (p=ns). Despite no out-of-hospital cardiac arrest in the waterpark during the 3 year follow- up, it seems reasonable to install AED in sporting places with thousands of visitors per year.