VF or VT – Earlier Defibrillation Is Better?

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In a retrospective study of 142 patients with an initial shockable rhythm and 4 to 5 episodes of recurrent/refractory ventricular fibrillation (VF) or pulseless ventricular tachycardia (pVT), shorter duration of VF and pVT was associated with higher rates of ROSC. 

Source 

The impact of time to defibrillation on return of spontaneous circulation in out-of-hospital cardiac arrest patients with recurrent shockable rhythms. Resuscitation. 2024;201:110286. doi:10.1016/j.resuscitation.2024.110286. PMID: 38901663.