AIM: In out of hospital cardiac arrest (OHCA) the start of Cardiopulmonary Resuscitation (CPR) by a single rescuer may be delayed considerably if the total time (TT) to connect the telephone call to the Emergency Medical Communication Centre (EMCC) is prolonged. EUROCALL investigated the TT-EMCC and its components using different calling procedures. METHODS: This prospective, multicentre, randomised study was performed in April 2013. Telephone calls were randomly allocated to time of call, and to those connecting directly to the EMCC (1-step procedure) and those diverted before connecting to the EMCC (2-step procedure). RESULTS: Twenty-one EMCCs from 11 countries participated in the study. Time to first ringtone was similar between 1-step 3.7s (IQR 1.0-5.2) and 2-step calls 4.0s (IQR 2.4-5.2). For the 1878 1-step calls, the median TT-EMCC was 11.7s (IQR 8.7-18.5). For the 1550 2-step calls, the median time from first ringtone to first call-taker was 7s (IQR 4.6-11.9) and from first call-taker to EMCC was 18.7s (IQR 13.4-29.9). Median TT-EMCC was 33.2 s (IQR 24.7-46.1) and was significantly longer than the TT-EMCC observed with the 1-step procedure (P<0.0001). Significant differences existed among participating regions between and within different countries both for 1-step and 2-step procedures. CONCLUSION: TT-EMCC was significantly shorter in a 1-step procedure compared to a 2-step procedure. Regional differences existed between countries but also within countries. This may be relevant in cases of OHCA and other situations where patient outcome is critically time-dependent.

Academic Medical Centre Amsterdam The Netherlands

American Medical Center University of Nicosia Cyprus

Antwerp University Hospital and University of Antwerp Antwerp Belgium

Center for Emergency Medicine Clinical Hospital Center Zagreb Zagreb Croatia

Dept of Emergency Medicine and Services Helsinki University Hospital and Helsinki University Helsinki Finland

Emergency Medical Services of the Hradec Králové Region Hradec Králové Czechia; Department of Anaesthesiology and Intensive Care Medicine University Hospital Hradec Kralove Czechia

Konstantopouleio General Hospital Athens Greece

Municipal Institute for Emergency Medicine Novi Sad Serbia; Serbian Resuscitation Council Novi Sad Serbia

Universitatea de Medicină şi Farmacie Gr T Popa Iaşi Romania

University of Antwerp Antwerp Belgium

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