Assessment of the prognostic ability of the platelet-to-lymphocyte ratio in patients with myocardial revascularization after coronavirus infection

Despite the advances in interventional cardiology, the problem of coronary restenosis remains relevant. An important factor in the pathogenesis of restenosis is the inflammatory process in the vascular intima. The aim of the study is to evaluate the relationship between the platelet-to-lymphocyte ratio (PLR), clinical and laboratory parameters in patients with repeat myocardial revascularization, and to analyze its prognostic value for clinical outcomes. Material and methods. A crosssectional study included 931 patients who underwent repeat myocardial revascularization between May 2020 and May 2023. In-stent restenosis was detected in 420 patients in the main group, of which 162 patients previously had COVID-19. The control group included 511 patients without in-stent restenosis (107 patients previously had COVID-19). All registered events were verified by the hospital's electronic records in the Integrated Medical Information System. Results. The regression analysis showed a statistically significant association of PLR with neutrophil and creatinine levels in both study groups, as well as with AST in the main group. PLR is not a significant predictor of myocardial infarction with coronary artery restenosis (OR = 1.0). Also, no relationship was found between the survival of patients with repeat revascularization and PLR. Conclusion. An association of PLR with some laboratory parameters was determined, but its prognostic value for myocardial infarction with coronary artery restenosis was not found.