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Rapid dispatch for out-of-hospital cardiac arrest is associated with improved survival. 2021

Filip Gnesin, and Amalie Lykkemark Møller, and Elisabeth Helen Anna Mills, and Nertila Zylyftari, and Britta Jensen, and Henrik Bøggild, and Kristian Bundgaard Ringgren, and Stig Nikolaj Fasmer Blomberg, and Helle Collatz Christensen, and Kristian Kragholm, and Freddy Lippert, and Fredrik Folke, and Christian Torp-Pedersen
Department of Cardiology, Nordsjællands Hospital, Dyrehavevej 29, 3400 Hillerød, Denmark. Electronic address: filip.gnesin@gmail.com.

As proxy for initiation of the first link in the Chain of Survival by the dispatcher, we aimed to investigate the effect of time to first dispatch on 30-day survival among patients with OHCA ultimately receiving the highest-level emergency medical response. We linked data on all OHCA unwitnessed by emergency medical services (EMS) treated by Copenhagen EMS from 2016 through 2018 to corresponding emergency call records. Among patients receiving highest priority emergency response, we calculated time to dispatch as time from start of call to time of first dispatch. We included 3548 patients with OHCA. Of these, 94.1% received the highest priority response (median time to dispatch 0.84 min, 25th-75th percentile 0.58-1.24 min). Patients with time to dispatch within one minute compared to three or more minutes were more likely to receive bystander cardiopulmonary resuscitation (77.3 vs 54.2%), bystander defibrillation (11.5 vs 6.5%) and defibrillation by emergency medical services (24.1 vs 7.5%) and were 2.6-fold more likely to survive 30 days after the OHCA (P = 0.004). Results from multivariate logistic regression were similar: odds ratio (OR) of survival 0.83 per minute increase (95% confidence interval 0.70-1.00, P = 0.04). However, survival was similar between those who received highest priority response and those who did not: OR of survival 0.88 (95% confidence interval 0.53-1.46, P = 0.61). Rapid time to dispatch among patients with highest priority response was significantly associated with a higher probability of 30-day survival following OHCA.

UI MeSH Term Description Entries
D004632 Emergency Medical Services Services specifically designed, staffed, and equipped for the emergency care of patients. Emergency Care,Emergency Health Services,Emergicenters,Prehospital Emergency Care,Emergency Care, Prehospital,Emergency Services, Medical,Medical Services, Emergency,Services, Emergency Medical,Emergency Health Service,Emergency Medical Service,Emergency Service, Medical,Emergicenter,Health Service, Emergency,Health Services, Emergency,Medical Emergency Service,Medical Emergency Services,Medical Service, Emergency,Service, Emergency Health,Service, Emergency Medical,Service, Medical Emergency,Services, Emergency Health,Services, Medical Emergency
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D016015 Logistic Models Statistical models which describe the relationship between a qualitative dependent variable (that is, one which can take only certain discrete values, such as the presence or absence of a disease) and an independent variable. A common application is in epidemiology for estimating an individual's risk (probability of a disease) as a function of a given risk factor. Logistic Regression,Logit Models,Models, Logistic,Logistic Model,Logistic Regressions,Logit Model,Model, Logistic,Model, Logit,Models, Logit,Regression, Logistic,Regressions, Logistic
D016017 Odds Ratio The ratio of two odds. The exposure-odds ratio for case control data is the ratio of the odds in favor of exposure among cases to the odds in favor of exposure among noncases. The disease-odds ratio for a cohort or cross section is the ratio of the odds in favor of disease among the exposed to the odds in favor of disease among the unexposed. The prevalence-odds ratio refers to an odds ratio derived cross-sectionally from studies of prevalent cases. Cross-Product Ratio,Risk Ratio,Relative Odds,Cross Product Ratio,Cross-Product Ratios,Odds Ratios,Odds, Relative,Ratio, Cross-Product,Ratio, Risk,Ratios, Cross-Product,Ratios, Risk,Risk Ratios
D016887 Cardiopulmonary Resuscitation The artificial substitution of heart and lung action as indicated for HEART ARREST resulting from electric shock, DROWNING, respiratory arrest, or other causes. The two major components of cardiopulmonary resuscitation are artificial ventilation (RESPIRATION, ARTIFICIAL) and closed-chest CARDIAC MASSAGE. Basic Cardiac Life Support,CPR,Code Blue,Mouth-to-Mouth Resuscitation,Cardio-Pulmonary Resuscitation,Life Support, Basic Cardiac,Cardio Pulmonary Resuscitation,Mouth to Mouth Resuscitation,Mouth-to-Mouth Resuscitations,Resuscitation, Cardio-Pulmonary,Resuscitation, Cardiopulmonary,Resuscitation, Mouth-to-Mouth,Resuscitations, Mouth-to-Mouth
D058687 Out-of-Hospital Cardiac Arrest Occurrence of heart arrest in an individual when there is no immediate access to medical personnel or equipment. Out-of-Hospital Heart Arrest,Cardiac Arrest, Out-of-Hospital,Cardiac Arrests, Out-of-Hospital,Heart Arrest, Out-of-Hospital,Heart Arrests, Out-of-Hospital,Out of Hospital Cardiac Arrest,Out of Hospital Heart Arrest,Out-of-Hospital Cardiac Arrests,Out-of-Hospital Heart Arrests

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