Overview of Pol-AED missions, timeframes during BLS conducted by the police, and the automated external defibrillator (AED) model with the respective shortest durations. (A) Emergency call; (B) Emergency medical service’ arrival on scene; (C) Start of advanced life support; I: Police arriving on scene (no timestamp available); II: AED being turned on (probably with simultaneous chest compressions performed by second police officer until AED is ready); III: Electrodes placed on patient; IV: Start of rhythm analysis; V: Analysis completed; VI: Start of shock loading; VIII: Loading completed; VIII: Shock delivered; IX: Starting chest compressions after the first shock. Additionally, see Table 2. LP (Lifepak) CR Plus: Physio-Control, Redmond, WA, USA; HeartStart FRx: Philips, Amsterdam, The Netherlands; HeartStart HS1: Philips, Amsterdam, The Netherlands; LP 1000: Physio-Control, Redmond, WA, USA.