Flow diagram of study population
This figure illustrates how exclusion criteria were applied to determine the final study population: in-hospital cardiac arrest patients with return of spontaneous circulation and an initial rhythm of ventricular fibrillation
ICD: International Classification of Diseases; VF: ventricular fibrillation; LOS: length of stay; IHCA: in-hospital cardiac arrest; OHCA: out-of hospital cardiac arrest; ROSC: return of spontaneous circulation