Carolina Malta Hansen1, Freddy Knudsen Lippert2, Mads Wissenberg2, Peter Weeke2, Line Zinckernagel2, Martin H Ruwald2, Lena Karlsson2, Gunnar Hilmar Gislason2, Søren Loumann Nielsen2, Lars Køber2, Christian Torp-Pedersen2, Fredrik Folke2. 1. From the Department of Cardiology, Copenhagen University Hospital Gentofte, Denmark (C.M.H., M.W., P.W., M.H.R., L.K., G.H.G., F.F.); The Emergency Medical Services, Copenhagen, Copenhagen University, Denmark (F.K.L., S.L.N., F.F.); The National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark (L.Z., G.H.G.); The Heart Centre, Copenhagen University Hospital Rigshospitalet, Denmark (L.K.); and The Institute of Health, Science and Technology, Aalborg University, Denmark (C.T.-P.). cmh@heart.dk. 2. From the Department of Cardiology, Copenhagen University Hospital Gentofte, Denmark (C.M.H., M.W., P.W., M.H.R., L.K., G.H.G., F.F.); The Emergency Medical Services, Copenhagen, Copenhagen University, Denmark (F.K.L., S.L.N., F.F.); The National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark (L.Z., G.H.G.); The Heart Centre, Copenhagen University Hospital Rigshospitalet, Denmark (L.K.); and The Institute of Health, Science and Technology, Aalborg University, Denmark (C.T.-P.).
Abstract
BACKGROUND: Although increased dissemination of automated external defibrillators (AEDs) has been associated with more frequent AED use, the trade-off between the number of deployed AEDs and coverage of cardiac arrests remains unclear. We investigated how volunteer-based AED dissemination affected public cardiac arrest coverage in high- and low-risk areas. METHODS AND RESULTS: All public cardiac arrests (1994-2011) and all registered AEDs (2007-2011) in Copenhagen, Denmark, were identified and geocoded. AED coverage of cardiac arrests was defined as historical arrests ≤100 m from an AED. High-risk areas were defined as those with ≥1 arrest every 2 years and accounted for 1.0% of the total city area. Of 1864 cardiac arrests, 18.0% (n=335) occurred in high-risk areas throughout the study period. From 2007 to 2011, the number of AEDs and the corresponding coverage of cardiac arrests increased from 36 to 552 and from 2.7% to 32.6%, respectively. The corresponding increase for high-risk areas was from 1 to 30 AEDs and coverage from 5.7% to 51.3%, respectively. Since the establishment of the AED network (2007-2011), few arrests (n=55) have occurred ≤100 m from an AED with only 14.5% (n=8) being defibrillated before the arrival of emergency medical services. CONCLUSIONS: Despite the lack of a coordinated public access defibrillation program, the number of AEDs increased 15-fold with a corresponding increase in cardiac arrest coverage from 2.7% to 32.6% over a 5-year period. The highest increase in coverage was observed in high-risk areas (from 5.7% to 51.3%). AED networks can be used as useful tools to optimize AED placement in community settings.
BACKGROUND: Although increased dissemination of automated external defibrillators (AEDs) has been associated with more frequent AED use, the trade-off between the number of deployed AEDs and coverage of cardiac arrests remains unclear. We investigated how volunteer-based AED dissemination affected public cardiac arrest coverage in high- and low-risk areas. METHODS AND RESULTS: All public cardiac arrests (1994-2011) and all registered AEDs (2007-2011) in Copenhagen, Denmark, were identified and geocoded. AED coverage of cardiac arrests was defined as historical arrests ≤100 m from an AED. High-risk areas were defined as those with ≥1 arrest every 2 years and accounted for 1.0% of the total city area. Of 1864 cardiac arrests, 18.0% (n=335) occurred in high-risk areas throughout the study period. From 2007 to 2011, the number of AEDs and the corresponding coverage of cardiac arrests increased from 36 to 552 and from 2.7% to 32.6%, respectively. The corresponding increase for high-risk areas was from 1 to 30 AEDs and coverage from 5.7% to 51.3%, respectively. Since the establishment of the AED network (2007-2011), few arrests (n=55) have occurred ≤100 m from an AED with only 14.5% (n=8) being defibrillated before the arrival of emergency medical services. CONCLUSIONS: Despite the lack of a coordinated public access defibrillation program, the number of AEDs increased 15-fold with a corresponding increase in cardiac arrest coverage from 2.7% to 32.6% over a 5-year period. The highest increase in coverage was observed in high-risk areas (from 5.7% to 51.3%). AED networks can be used as useful tools to optimize AED placement in community settings.
Authors: Steen Møller Hansen; Carolina Malta Hansen; Fredrik Folke; Shahzleen Rajan; Kristian Kragholm; Linda Ejlskov; Gunnar Gislason; Lars Køber; Thomas A Gerds; Søren Hjortshøj; Freddy Lippert; Christian Torp-Pedersen; Mads Wissenberg Journal: JAMA Cardiol Date: 2017-05-01 Impact factor: 14.676
Authors: Line Zinckernagel; Carolina Malta Hansen; Morten Hulvej Rod; Fredrik Folke; Christian Torp-Pedersen; Tine Tjørnhøj-Thomsen Journal: BMC Emerg Med Date: 2017-01-19
Authors: Carolina Malta Hansen; Line Zinckernagel; Annette Kjær Ersbøll; Tine Tjørnhøj-Thomsen; Mads Wissenberg; Freddy Knudsen Lippert; Peter Weeke; Gunnar Hilmar Gislason; Lars Køber; Christian Torp-Pedersen; Fredrik Folke Journal: J Am Heart Assoc Date: 2017-03-14 Impact factor: 5.501
Authors: Steen M Hansen; Stig Brøndum; Grethe Thomas; Susanne R Rasmussen; Birgitte Kvist; Anette Christensen; Charlotte Lyng; Jan Lindberg; Torsten L B Lauritsen; Freddy K Lippert; Christian Torp-Pedersen; Poul A Hansen Journal: PLoS One Date: 2015-10-28 Impact factor: 3.240
Authors: M Agerskov; M B Hansen; A M Nielsen; T P Møller; M Wissenberg; L S Rasmussen Journal: Acta Anaesthesiol Scand Date: 2017-09-13 Impact factor: 2.105
Authors: Carolina Malta Hansen; Simone Mørk Rosenkranz; Fredrik Folke; Line Zinckernagel; Tine Tjørnhøj-Thomsen; Christian Torp-Pedersen; Kathrine B Sondergaard; Graham Nichol; Morten Hulvej Rod Journal: J Am Heart Assoc Date: 2017-03-13 Impact factor: 5.501