Abstract:Objective To investigate the effect of percutaneous coronary intervention (PCI) on anti-inflamation factors IL-37, hs-CRP, monocytes, neutrophil and lymphocyte ratio in patients with acute coronary syndrome and to evaluate the correlation between inflammatory index and Gensini score, cardiac remodeling and function. Methods The levels of plasma IL-37, hs-CRP, periphera monocyte, neutrophil and lymphocyte were detected in 58 patients with ACS 24 hours before and after PCI. Plasma levels of NT-proBNP, left ventricular end diastolic diameter (LVEDD) and left ventricular ejection fraction (LVEF) were measured as well. Total 30 subjects with chest pain and without coronary heart disease were selected as control group. Results Compared with the control group, the serum hs-CRP levels, peripheral blood monocyte counts and NLR of the ACS group were significantly higher, and the plasma level of IL-37 was lower in the patients of ACS group (P < 0.05). Compared with preoperative state, the peripheral blood monocyte counts, NLR and the serum hs-CRP levels were increased significantly, and the serum levels of IL-37 decreased after PCI were increased(P < 0.05). Preoperative plasma IL-37 levels were negatively correlated with Gensini scores. Preoperative plasma hs-CRP levels, monocyte counts, NLR and were positively related to Gensini scores, LVEDD and NT-proBNP levels. Preoperative NLR was negatively correlated with LVEF. Conclusions PCI surgery leads further aggravate imbalance of anti-inflammatory /pro-inflammatory response in vivo. The inflammatory indexes such as IL-37 level, hs-CRP, monocyte counts, NLR before PCI reflect coronary lesion severity and ventricular remodeling and heart function in a certain extent in patients with ACS.