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We sought to assess the prevalence of shock-induced sustained return of spontaneous circulation (ROSC) and neurologically intact discharge survival before (1990–1997) and after (1998–2006) transition to biphasic waveform defibrillation in our population-controlled EMS setting.All victims of out-of-hospital cardiac arrest with ventricular fibrillation as the initial rhythm from November 1990 to December...
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