Study Commentary | Immediate versus delayed cardiac catheterization in post-arrest patients without ST elevation myocardial infarction: is survivorship bias an important influence? 8 Apr, 2022 | 10:11h | UTC Immediate Versus Delayed Cardiac Catheterization in Post-Arrest Patients Without ST Elevation Myocardial Infarction: Is Survivorship Bias an Important Influence? – Annals of Emergency Medicine Original Study: #ESCCongress – RCT: Immediate coronary angiography after out-of-hospital cardiac arrest without ST-segment elevation did not improve outcomes compared to delayed/selective angiography.