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ABSTRACT
Background: Cardiopulmonary resuscitation and early defibrillation have been shown to improve outcomes of cardiac arrest. The significance of the post-arrest echocardiogram, specifically the left ventricular ejection fraction (LVEF) is unknown. Methods: We performed a retrospective cohort study of patients who suffered from cardiac arrest between 1 January 2009 and 31 December 2013. We included all patients who achieved return of spontaneous circulation (ROSC), and were admitted to the intensive care unit (ICU) or coronary care unit (CCU) of a tertiary care academic center. Patients who underwent echocardiography within 24 h of cardiac arrest were included for analysis. The primary outcome was survival. Results: We identified 151 patients who achieved ROSC of which 97 underwent post-arrest echocardiogram within 24 h. 70.8% were males and the mean age was 67.8 years (SD: 15.9). The mean LVEF at 24 h was 35.7 (SD: 17.8). LVEF > 40% was not a predictor of survival at 30 days or hospital discharge. The only significant predictors on multivariate analyses were age, presence of shockable rhythm and time to ROSC. Conclusion: Although echocardiograms are frequently ordered, LVEF greater than 40% in patients who are resuscitated after a cardiac arrest is not a predictor of survival.
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Declaration of interest
The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.