XXXX in Stockholm with special reference to the ambulance organization.

@entity1 @entity1165 @entity2224 @entity1167
During a one-year period all @entity1 with @entity1167 ( @entity1167 ) taken care of by three ambulances were studied. An incidence of 110 cardiac arrests/100,000 inhabitants/year was found. The majority of CAs affected the elderly and occurred during the day in their homes. The majority of CAs were witnessed but cardiopulmonary resuscitation (CPR) had been initiated by bystanders in only a few cases. The ambulance arrived within a mean time of 7.7 +/- 4.0 min. Forty-eight per cent of the @entity1167 @entity1 showed @entity1165 or @entity2224 (VT/VF) on ambulance arrival. @entity1 with a prolonged ambulance delay showed a lower incidence of VT/VF than @entity1 with a short delay. @entity1 in whom CPR had been initiated by bystanders showed a significantly higher incidence of VT/VF (67%) than unattended @entity1 (45%). Bystander CPR was furthermore associated with an increased incidence of VT/VF in @entity1 with prolonged ambulance delay. VT/VF was present at the time when the ambulance arrived in 86% of the @entity1167 @entity1 who had received CPR from a bystander and were reached within 8 min by the ambulance.
