Coronary heart disease (CHD) combined with heart failure results in a rapidly progressing disease with an acute onset, posing a significant threat to a patient's survival. Metoprolol, a β-blocker, is effective in treating heart failure; however, due to its complex pathogenesis, the efficacy of monotherapy in managing disease progression remains suboptimal. Sacubitril/valsartan, an angiotensin II receptor antagonist, is another widely used drug for treating heart failure. The combination of the two drugs may play a synergistic role in effectively managing heart failure through different mechanisms. This study aims to investigate the effects of sacubitril/valsartan combined with metoprolol on cardiac function, cardiac remodeling, and endothelial function in patients with CHD and heart failure.This retrospective analysis included 138 CHD patients combined with heart failure who received care at Linhai Hospital of Traditional Chinese Medicine between January 2022 and January 2024. Based on the treatment regimen, patients were divided into two groups. Patients receiving metoprolol monotherapy were included in the Metoprolol group (n = 61), while those receiving a combination of sacubitril/valsartan and metoprolol were assigned to the Combination group (n = 77). The cardiac function [New York Heart Association (NYHA) cardiac function classification], myocardial injury markers [serum cardiac troponin I (cTnI), N-terminal pro-brain natriuretic peptide (NT-proBNP)], cardiac remodeling function [left ventricular ejection fraction (LVEF), left ventricular end-diastolic diameter (LVEDD), left ventricular end-systolic diameter (LVESD)], endothelial function [serum endothelin-1 (ET-1), nitric oxide (NO)] were compared between these two groups before treatment and 3 months post-treatment. Additionally, the two groups were comparatively assessed for the incidence of adverse reactions during the treatment period.Following treatment, the NYHA cardiac function grading was significantly improved in the Combination group than in the Metoprolol group (= 0.014). After treatment, the Combination group demonstrated significantly lower serum cTnI and NT-proBNP levels than the Metoprolol group (< 0.05). After treatment, the Combination group had substantially higher LVEF and lower LVEDD and LVESD than the Metoprolol group (< 0.05). Furthermore, the Combination group showed a significant decrease in serum ET-1 levels and an increase in serum NO levels compared to the Metoprolol group (< 0.05). During the treatment period, there was no significant difference in the incidence of adverse reactions between the two groups (> 0.05).Sacubitril/valsartan combined with metoprolol is a safe, effective, and viable treatment option for patients with CHD combined with heart failure. This combination therapy may further improve cardiac and endothelial function by reducing cardiac remodeling, without increasing the risk of adverse reactions. This study offers a new drug combination regimen (sacubitril/valsartan combined with metoprolol) for patients with CHD combined with heart failure. This regimen further improves the cardiac and endothelial function, inhibits cardiac remodeling, and has good safety. Aims/Background Methods Results Conclusion p p p p p
