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Worldwide, several recent studies record a decline in the prevalence of ventricular fibrillation (VF)/ventricular tachycardia (VT) as cause of death from cardiac arrest, with a corresponding increase in the prevalence of pulseless electrical activity (PEA). Researchers reviewed records for 1277 adult patients (mean age, 65; 67% men) who underwent resuscitation for sudden cardiac death in Portland, Oregon, from 2002 to 2007 to identify factors associated with PEA versus VF/VT.
The initial rhythm was VF/VT in 48% of patients and PEA in 25%. Overall, 13% of patients survived to hospital discharge; survival rates were significantly lower in PEA cases than in VF/VT cases (6% vs. 24%). In multivariate analysis, history of syncope (odds ratio, 2.64…