Efficacy and safety of Zhenyuan capsule in the treatment of chronic heart failure: A meta-analysis and trial sequential analysis

Background: Chronic heart failure (CHF) is a common and difficult-to-treat disease in clinical practice. The efficacy and safety of Zhenyuan capsule (ZYC) in the treatment of CHF were evaluated by meta-analysis and trial sequential analysis (TSA) of published relevant data. Methods: Searched 8 databases for clinical literature on ZYC in the treatment of CHF, up to December 2022. Then the meta-analysis and TSA were performed on the studies that met the inclusion criteria. Results: Meta-analysis showed that compared with conventional treatment, combined use of ZYC could significantly increase the clinical effective rate (risk ratio 1.20, 95% confidence interval [CI] 1.14 similar to 1.26, P < .00001) by 20%, left ventricular ejection fraction (MD 8.85, 95%CI 4.57 similar to 13.12, P < .0001) by 8.85%, and 6-minutes walking distance (MD 47.91, 95%CI 18.66 similar to 77.17, P = .001) by 47.91 m, and significantly reduce brain natriuretic peptide (MD -247.86, 95%CI -330.62 similar to-165.09, P < .00001) by 247.86 pg/mL. TSA showed that the benefits suggested by the original results were conclusive. In terms of safety, the total adverse events in the combined group of ZYC were comparable to those in the conventional group, and TSA demonstrated that this result needed more research and demonstration. Conclusion: ZYC can effectively improve the clinical efficacy of treating CHF, significantly increase left ventricular ejection fraction and 6-minute walk distance, and remarkably reduce brain natriuretic peptide. ZYC, with definite efficacy and safety, has the value of clinical application and in-depth research.