Association of Bystander Cardiopulmonary Resuscitation and Survival According to Ambulance Response-times after Out-of-Hospital Cardiac Arrest

摘要: Background: Bystander-initiated cardiopulmonary resuscitation (CPR) increases patient survival after out-of-hospital cardiac arrest, but it is unknown to what degree bystander CPR remains positively associated with increasing time potential defibrillation. The main objective was examine the association of as advanced treatment increases. Methods: We studied 7623 arrest patients between 2005 and 2011, identified through nationwide Danish Cardiac Arrest Registry. Multiple logistic regression analysis used from 911 call emergency medical service arrival (response time) according whether provided (yes or no). Reported are 30-day chances 95% bootstrap confidence intervals. Results: With response times, adjusted decreased for both those without. However, contrast versus without increased over time: within 5 minutes, 14.5% (95% interval [CI]: 12.8–16.4) 6.3% CI: 5.1–7.6), corresponding 2.3 times higher CPR; 10 were 6.7% 5.4–8.1) 2.2% 1.5–3.1), 3.0 CPR. in became statistically insignificant when >13 minutes (bystander vs no CPR: 3.7% [95% 2.2–5.4] 1.5% 0.6–2.7]), still 2.5 Based on model statistics, an additional 233 could potentially be saved annually if reduced 119 7 (the median this study) minutes. Conclusions: absolute declined rapidly time. Yet while waiting ambulance a more than doubling even case long Decreasing by few lead many lives every year. # Clinical Perspective {#article-title-27}