Xu N, et al. - This study was designed to shed light on the prognostic value of neutrophil to lymphocyte ratio (NLR) in patients with left main disease (LMD)/three-vessel disease (3VD) who underwent percutaneous coronary intervention (PCI) for acute myocardial infarction (AMI). Findings suggested that admission NLR, being a relatively inexpensive marker of inflammation, may help in the risk stratification and prognosis of patients diagnosed with LMD/3VD.