Colegio Argentino de Cardioangiólogos Intervencionistas Revista Argentina de Cardioangiología intervencionista 2250-7531 2313-9307 11 3 2020 09 30 Neutrophil-lymphocyte ratio for the diagnosis of type 4a myocardial infarction 0124 0129 EN Suilbert Rodríguez Blanco Interventional Cardiology Unit suilbertr@infomed.sld.cu; suilbertrb@gmail.com Abel Y Leyva Quert Interventional Cardiology Unit José M Aguilar Medina Interventional Cardiology Unit Favian A Barcelay Leyva Cardiology Unit Teddy O Tamargo Barbeito Biostatistical Unit. Hospital Hermanos Ameijeiras, Havana, Cuba Introduction. Periprocedural type 4a myocardial infarction is among the complications associated with percutaneous coronary interventions. The important role played by inflammation in cardiovascular disease is well-known, and a better expression of this inflammatory state is the neutrophil-lymphocyte ratio.Objective. To assess the association between the neutrophil-lymphocyte ratio and the appearance of type 4a myocardial infarction and the potential diagnostic value of this biological marker. Methodology. Applied, descriptive-correlational, and prospective study. The neutrophil-lymphocyte ratio was obtained six hours after coronary intervention at the “Hermanos Ameijeiras” Hospital, Havana, Cuba, between November 2018 and January 2020.Results. A total of 184 patients were studied, 25 of whom developed type 4a infarction. In patients with heart attack, the ratio increased after the procedure [4.26±0.95; (3.87-4.65)] vs [3.19±0.86; (2.83-3.54)]. Ratios >2.63 were associated with the diagnosis of the complication, with an area under the ROC curve for diagnosis of 0.932 (95%CI: 0.868-0.995; p<.001).Conclusions. The neutrophil-lymphocyte ratio has high sensitivity, high specificity, and high positive and negative predictive values in the diagnosis of type 4a myocardial infarction. neutrophil-lymphocyte ratio, periprocedural type 4a myocardial infarction http://www.raci.com.ar/contenido/art.php?recordID=MTgwNg== http://recursos.meducatium.com.ar/contenido/articulos/24201240129_1806/pdf/24201240129.pdf