LGALS3 and heart failure: In our study, galectin-3 plasma concentration, determined on the third day of hospitalization for the first acute NSTEMI, without reduced LVEF and signs of heart failure, has not shown a significant correlation with LVEF, left ventricular end-diastolic and end-systolic volume indices and left atrial volume index, which were determined on the first day of hospitalization using echocardiography, nor with the BNP plasma concentration.