• Andreas Claesson, Leif Svensson, Johan Silfverstolpe, and Johan Herlitz.
• Kungälv Ambulance Service, Kungälv, Sweden.
• Resuscitation. 2008 Mar 1;76(3):381-7.

AimTo describe the characteristics and outcome among patients with out-of-hospital cardiac arrest (OHCA) caused by drowning as compared with OHCA caused by a cardiac etiology (outside home).Patients And MethodsAll the patients included in the Swedish OHCA Registry between 1990 and 2005 which were not crew witnessed, in whom cardio-pulmonary resuscitation (CPR) was attempted, were evaluated for inclusion. Those caused by drowning were compared with those with a cardiac etiology (outside home).ResultsPatients with OHCA due to drowning (n=255) differed from patients with OHCA with a cardiac etiology (n=7494) as they were younger, less frequently suffered a witnessed OHCA, more frequently received bystander CPR and less frequently were found in a shockable rhythm. Patients with OHCA due to drowning had a prolonged ambulance response time as compared with patients with OHCA with a cardiac etiology. Patients with OHCA due to drowning had a survival rate to 1 month of 11.5% as compared with 8.8% among patients with OHCA due to a cardiac etiology (NS). Among patients with OHCA due to drowning, only one independent predictor of survival was defined, i.e. time from calling for an ambulance until the arrival of the rescue team, with a much higher survival among patients with a shorter ambulance response time.ConclusionAmong patients with OHCA 0.9% were caused by drowning. They had a similar survival rate to 1 month as compared with OHCA outside home with a cardiac etiology. The factor associated with survival was the ambulance response time; a higher survival with a shorter response time.

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