Abstract
Introduction: Mechanical chest compression (MCC) provides consistent pressure and timing of each chest compression in line with latest evidenced-based practice. However, there has been no evidence from large randomized trials about the effectiveness of the mechanical device compared with manual chest compression. Furthermore, few studies focused on cardiogenic shock and cardiac arrest related to heart disease. Hypothesis: The aim is to assess the effectiveness and safety of mechanical chest compressions versus manual chest compressions in patients with out of hospital cardiogenic shock and cardiac arrest due to heart disease. Methods: We conducted a retrospective observational study of comparing the outcomes of mechanical and manual chest compressions. A total of 69 consecutive patients with out of hospital cardiogenic shock and cardiac arrest were enrolled between April 2014 and May 2018. 39 patients of them received only manual cardiopulmonary resuscitation (CPR) and 30 utilized a mechanical CPR device. Baseline characteristics, resuscitation details, and outcomes were compared between patients who received manual (manual group) and mechanical compressions (MCC group). Results: There was no significant difference in age, gender, the rate of bystander CPR and arterial blood gases at baseline. No differences were found for the rate of ROSC and 30-day survival between two groups. However, MCC group had significantly higher rate of bleeding events than manual group. In addition, fifty-four patients of them were treated with venoarterial extracorporeal membrane oxygenation (VA-ECMO). Among patients underwent VA-ECMO, the rate of 30-day survival was significantly lower in MCC group. (Figure 1). Conclusions: This study showed that mechanical chest compression increased bleeding events than manual chest compression. Furthermore, in the patients underwent ECMO, the use of mechanical chest compression might be associated with higher mortality.
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