Elevated neutrophil-to-lymphocyte ratio can predict procedural adverse events in patients with ST-elevation myocardial infarction undergoing primary percutaneous coronary intervention.

Background: Elevated neutrophil-to-lymphocyte ratio (NLR) is an indirect marker of inflammation, and is associated with adverse clinical outcomes in patients with ST-segment elevation myocardial infarction (STEMI). The aim of this study was to investigate the usefulness of NLR to predict procedural adverse events is patients who underwent primary percutaneous coronary intervention (PCI).

Patients And Methods: Consecutive patients with STEMI who underwent primary PCI were divided into low and high NLR, whereas high was defined as an NLR value above 75° percentile (≥9.