Letter by Ristagno and Li Regarding Article, “Waveform Analysis–Guided Treatment Versus a Standard Shock-First Protocol for the Treatment of Out-of-Hospital Cardiac Arrest Presenting in Ventricular Fibrillation: Results of an International Randomized, Controlled Trial”
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To the Editor:
Real-time ventricular fibrillation (VF) waveform analysis has been advocated for several decades as a potential decision tool to optimize cardiopulmonary resuscitation intervention, that is, chest compression or defibrillation. Indeed, the search for a reliable predictor of successful defibrillation obtained from the VF features analysis began almost 30 years ago with the studies by Weaver and colleagues1 on VF amplitude and the introduction of the definitions of fine and coarse VF used worldwide. Although numerous retrospective studies confirmed the validity of this approach, until now, there were no prospective investigations.2 We therefore applaud the elegant study by Freese et al3 that evaluated this “old” new approach …