Cardiac arrests remain a leading cause of death worldwide. Most patients have nonshockable electrocardiographic presentations (asystole/pulseless electrical activity). Despite well-performed basic and advanced cardiopulmonary resuscitation (CPR) interventions, patients with these presentations have always faced unlikely chances of survival. The primary objective was to determine if, in addition to conventional CPR (C-CPR), expeditious application of noninvasive circulation-enhancing adjuncts, and then gradual elevation of head and thorax, would be associated with higher likelihoods of survival following out-of-hospital cardiac arrest (OHCA) with nonshockable presentations.

中文翻译：

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使用无创循环辅助设备和头/胸部抬高治疗的不可电击心脏骤停的生存率。

心脏骤停仍然是全世界死亡的主要原因。大多数患者有不可电击的心电图表现（心搏停止/无脉电活动）。尽管基础和高级心肺复苏 (CPR) 干预措施表现良好，但出现这些症状的患者始终面临着不太可能的生存机会。主要目的是确定，除了传统的心肺复苏 (C-CPR) 之外，快速应用无创循环增强辅助设备，然后逐渐抬高头部和胸部，是否会与患者死亡后更高的生存可能性相关。医院心脏骤停（OHCA）且不可电击。