• Clément Derkenne, Benoit Frattini, Sarah Menetre, Hong Tuan HaVivienVParis Fire Brigade, 1 place Jules Renard, 75017 Paris, France., Frédéric Lemoine, Frankie Beganton, Jean Philippe Didon, Emmanuel Rozenberg, Marina Salome, Julie Trichereau, Simon-Pierre Corcostegui, Sabine Lemoine, Romain Kedzierewicz, Guillaume Burlaton, Valentin Vial, Théo Dessertaine, Albane Miron De L'Espinay, Xavier Jouven, Stéphane Travers, Daniel Jost, and Paris Fire Brigade Cardiac Arrest Task Force.
• Paris Fire Brigade, 1 place Jules Renard, 75017 Paris, France. Electronic address: clement.derkenne@gmail.com.
• Resuscitation. 2024 Jun 21: 110292110292.

AimsDuring out-of-hospital cardiac arrest (OHCA), an automatic external defibrillator (AED) analyzes the cardiac rhythm every two minutes; however, 80% of refibrillations occur within the first minute post-shock. We have implemented an algorithm for Analyzing cardiac rhythm While performing chest Compression (AWC). When AWC detects a shockable rhythm, it shortens the time between analyses to one minute. We investigated the effect of AWC on cardiopulmonary resuscitation quality.MethodIn this cross-sectional study, we compared patients treated in 2022 with AWC, to a historical cohort from 2017. Inclusion criteria were OHCA patients with a shockable rhythm at the first analysis. Primary endpoint was the chest compression fraction (CCF). Secondary endpoints were cardiac rhythm evolution and survival, including survival analysis of non-prespecified subgroups.ResultsIn 2017 and 2022, 355 and 377 OHCAs met the inclusion criteria, from which we analyzed the 285 first consecutive cases in each cohort. CCF increased in 2022 compared to 2017 (77% [72-80] vs 72% [67-76]; P < 0.001) and VF recurrences were shocked more promptly (53 s [32-69] vs 117 s [90-132]). Survival did not differ between 2017 and 2022 (adjusted hazard-ratio 0.96 [95% CI, 0.78-1.18]), but was higher in 2022 within the sub-group of OHCAs that occurred in a public place and within a short time from call to AED switch-on (adjusted hazard ratio 0.85[0.76-0.96]).ConclusionsOHCA patients treated with AWC had higher CCF, shorter time spent in ventricular fibrillation, but no survival difference, except for OHCA that occurred in public places with short intervention time.Copyright © 2024. Published by Elsevier B.V.

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