Background and importance 

Out-of-hospital cardiac arrest is a leading cause of death in Europe. An understanding of region-specific factors is essential for informing strategies to improve survival.

Design 

This retrospective observational study included all out-of-hospital cardiac arrest patients attended by the Emergency Medical Service of the Algarve in 2019. Outcome data were derived from hospital records.

Main results 

In 2019, there were 850 out-of-hospital cardiac arrests treated with cardiopulmonary resuscitation in the Algarve, representing a population incidence of 189/100 000. Return of spontaneous circulation occurred in 83 patients (9.8%), of whom 17 (2.0%) had survival to hospital discharge and 15 (1.8%) had survival with good neurologic outcome. Among patients in the Utstein comparator group, survival to hospital discharge was 21.4%. Predictors of return of spontaneous circulation were age, witnessed arrest, initial shockable rhythm, time of year, time to cardiopulmonary resuscitation, and time to advanced life support. Predictors of survival to hospital discharge were age, initial shockable rhythm, time to rhythm analysis, and time to advanced life support. Predictors of survival with good neurologic outcome were age, initial shockable rhythm, and time to return of spontaneous circulation.

Conclusions 

The incidence of out-of-hospital cardiac arrest with cardiopulmonary resuscitation in the Algarve was higher than in other jurisdictions while return of spontaneous circulation, survival to hospital discharge, and survival with good neurologic outcome were comparatively low. An aging population, a geographically diverse region, and a low incidence of bystander cardiopulmonary resuscitation may have contributed to these outcomes. These results confirm the importance of early cardiopulmonary resuscitation, early rhythm assessment, and early advanced life support, all of which are potentially modifiable through public education, broadening of the defibrillator network and increased availability of advanced life support teams.

中文翻译：

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葡萄牙阿尔加维地区的院外心脏骤停：一项带有结果数据的回顾性注册试验

背景和重要性 

在欧洲，院外心脏骤停是导致死亡的主要原因。了解特定区域的因素对于制定提高生存率的策略至关重要。

设计 

这项回顾性观察研究包括 2019 年阿尔加维紧急医疗服务中心就诊的所有院外心脏骤停患者。结果数据来自医院记录。

主要结果 

2019 年，阿尔加维有 850 名院外心脏骤停患者接受了心肺复苏治疗，人口发病率为 189/100 000。83 名患者（9.8%）恢复了自主循环，其中 17 名（2.0%） ) 存活至出院，15 例 (1.8%) 存活且神经系统预后良好。在 Utstein 比较组的患者中，出院生存率为 21.4%。自主循环恢复的预测因素是年龄、目击者骤停、初始可电击节律、一年中的时间、心肺复苏时间和高级生命支持时间。出院存活率的预测因素是年龄、初始可电击节律、节律分析时间和高级生命支持时间。具有良好神经系统结果的生存预测因素是年龄、初始可电击节律、

结论 

阿尔加维的院外心肺复苏心脏骤停发生率高于其他司法管辖区，而自主循环恢复、出院存活率和神经系统预后良好的存活率相对较低。人口老龄化、地域多元化以及旁观者心肺复苏的低发生率可能导致了这些结果。这些结果证实了早期心肺复苏、早期节律评估和早期高级生命支持的重要性，所有这些都可以通过公共教育、扩大除颤器网络和增加高级生命支持团队的可用性来改变。