Fig. 1

Flow chart of the study. The subjects were 2101 consecutive AMI patients who underwent emergency PCI between 2004 and 2017. When divided into two groups according to incidence of OHCA, 95/2101 (4.5%) patients presented with OHCA. AMI acute myocardial infarction, OHCA out-of-hospital cardiac arrest, PCI percutaneous coronary intervention, ROSC return of spontaneous circulation