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In a randomized trial involving 8014 patients with out-of-hospital cardiac arrest, the use of epinephrine resulted in a significantly higher rate of 30-day survival than placebo but not a higher rate of survival with a favorable neurologic outcome.

In this randomized trial involving patients with out-of-hospital cardiac arrest without ST-segment elevation on postresuscitation electrocardiography, no benefit was found for immediate cardiac catherization as compared with delayed or selective catherization.

This study examined whether training in cardiopulmonary resuscitation increases the frequency of bystander CPR and the rate of survival. CPR performed before the arrival of emergency medical services was associated with a substantially greater 30-day survival rate. Out-of-hospital cardiac arrest is a major public health concern, given that there are approximately 420,000 cases in the United States and 275,000 cases in Europe annually. 1 – 3 Decreasing the time to treatment is crucial for improving outcomes in cases of cardiac arrest. 4 , 5 As stated in American and European guidelines, the most important response measures that currently can be taken outside a hospital setting are recognizing early that a cardiac arrest is occurring, placing an alarm call, performing cardiopulmonary resuscitation (CPR), and performing defibrillation. 6 , 7 Globally, CPR is taught to millions of people each year. In Sweden, more than 3 . . .

In a randomized trial, patients with out-of-hospital cardiac arrest who received extracorporeal CPR and those who received conventional CPR had similar results for survival and favorable neurologic outcomes.

Background To quantitatively summarize the available epidemiological evidence on the survival rate of out-of-hospital cardiac arrest (OHCA) patients who received cardiopulmonary resuscitation (CPR). Methods We systematically searched the PubMed, Embase, and Web of Science databases, and the references of retrieved articles were manually reviewed to identify studies reporting the outcome of OHCA patients who received CPR. The overall incidence and outcome of OHCA were assessed using a random-effects meta-analysis. Results A total of 141 eligible studies were included in this meta-analysis. The pooled incidence of return of spontaneous circulation (ROSC) was 29.7% (95% CI 27.6–31.7%), the rate of survival to hospital admission was 22.0% (95% CI 20.7–23.4%), the rate of survival to hospital discharge was 8.8% (95% CI 8.2–9.4%), the pooled 1-month survival rate was 10.7% (95% CI 9.1–13.3%), and the 1-year survival rate was 7.7% (95% CI 5.8–9.5%). Subgroup analysis showed that survival to hospital discharge was more likely among OHCA patients whose cardiac arrest was witnessed by a bystander or emergency medical services (EMS) (10.5%; 95% CI 9.2–11.7%), who received bystander CPR (11.3%, 95% CI 9.3–13.2%), and who were living in Europe and North America (Europe 11.7%; 95% CI 10.5–13.0%; North America: 7.7%; 95% CI 6.9–8.6%). The survival to discharge (8.6% in 1976–1999 vs. 9.9% in 2010–2019), 1-month survival (8.0% in 2000–2009 vs. 13.3% in 2010–2019), and 1-year survival (8.0% in 2000–2009 vs. 13.3% in 2010–2019) rates of OHCA patients who underwent CPR significantly increased throughout the study period. The Egger’s test did not indicate evidence of publication bias for the outcomes of OHCA patients who underwent CPR. Conclusions The global survival rate of OHCA patients who received CPR has increased in the past 40 years. A higher survival rate post-OHCA is more likely among patients who receive bystander CPR and who live in Western countries.

Patients who had cardiac arrest without ST-segment elevation were assigned to undergo either immediate coronary angiography or delayed coronary angiography (after neurologic recovery). All patients underwent PCI if indicated. There was no significant between-group difference in overall survival at 90 days.

Objective Brain injury is well established as a cause of early mortality after out-of-hospital cardiac arrest (OHCA), but postresuscitation shock also contributes to these deaths. This study aims to describe the respective incidence, risk factors, and relation to mortality of post-cardiac arrest (CA) shock and brain injury. Design Retrospective analysis of an observational cohort. Setting 24-bed medical intensive care unit (ICU) in a French university hospital. Patients All consecutive patients admitted following OHCA were considered for analysis. Post-CA shock was defined as a need for infusion of vasoactive drugs after resuscitation. Death related to brain injury included brain death and care withdrawal for poor neurological evolution. Intervention None. Measurements and main results Between 2000 and 2009, 1,152 patients were admitted after OHCA. Post-CA shock occurred in 789 (68 %) patients. Independent factors associated with its onset were high blood lactate and creatinine levels at ICU admission. During the ICU stay, 269 (34.8 %) patients died from post-CA shock and 499 (65.2 %) from neurological injury. Age, raised blood lactate and creatinine values, and time from collapse to restoration of spontaneous circulation increased the risk of ICU mortality from both shock and brain injury, whereas a shockable rhythm was associated with reduced risk of death from these causes. Finally, bystander cardiopulmonary resuscitation (CPR) decreased the risk of death from neurological injury. Conclusions Brain injury accounts for the majority of deaths, but post-CA shock affects more than two-thirds of OHCA patients. Mortality from post-CA shock and brain injury share similar risk factors, which are related to the quality of the rescue process.

In a trial involving patients with refractory ventricular fibrillation, double sequential external defibrillation or vector-change defibrillation improved survival as compared with standard defibrillation.

This study of targeted temperature interventions in 295 children who were comatose after cardiac arrest showed no significant difference between the hypothermia group (33.0°C) and the normothermia group (36.8°C) with respect to 1-year survival with a good functional outcome. Out-of-hospital cardiac arrest in children often results in death or in poor long-term functional outcome in survivors. 1 – 3 In 2002, two trials involving adults showed that therapeutic hypothermia improved neurologic outcomes in comatose survivors after out-of-hospital cardiac arrest with ventricular fibrillation or ventricular tachycardia. 4 , 5 International guidelines recommend therapeutic hypothermia for adults with out-of-hospital cardiac arrest who have similar characteristics. 6 , 7 Recently, another trial involving adults after out-of-hospital cardiac arrest showed that therapeutic hypothermia with the use of a target temperature of 33°C, as compared with actively maintained therapeutic normothermia (36°C), did not improve outcomes. 8 The fundamental difference between this . . .

Among patients in Denmark who survived for 30 days after out-of-hospital cardiac arrest, bystander CPR and bystander defibrillation were associated with significantly lower risks of brain damage or nursing home admission and of death from any cause than no bystander intervention.