Background: Percutaneous coronary intervention (PCI) is an important means for the treatment of coronary atherosclerotic heart disease and has effectively reduced the mortality of coronary heart disease. However, reperfusion can also cause certain damage to the vascular endothelium, leading to the major adverse cardiovascular events. Compound Danshen dropping pill is a Chinese patent medicine preparation. At present, many studies have evaluated the effect of compound Danshen dropping pill in reducing the incidence of adverse cardiovascular events after PCI. This study systematically evaluated the effect of compound Danshen dropping pills on major adverse cardiovascular events and quality of life after PCI and provides a reference for clinical application and research.Methods: All randomized controlled trials on the effects of compound Danshen dropping pills on adverse cardiovascular events and quality of life after PCI for coronary heart disease were searched for. The search was conducted from database inception to January 2022. Data extraction and quality assessment were performed by 2 reviewers according to the Protocol Guidelines for Systematic Reviews and Meta-analyses Protocols statement guidelines. Meta-analysis was performed using Review Manager Version 5.4 software and Stata 16 software. Results:The results of this study will allow for systematically evaluation of the effects of compound Danshen dropping pills on adverse cardiovascular events and quality of life after PCI for coronary heart disease.Conclusion: This study will provide objective evidence of a basis for compound Danshen dropping pills reducing adverse cardiovascular events and improving quality of life after PCI.

Review question / Objective: The results of this study will systematically evaluate the effects of Compound Danshen Dropping Pills on adverse cardiovascular events and quality of life after PCI for coronary heart disease. Rationale: This study will provide an objective evidence-based basis for compound Danshen dripping pills to INPLASY 1 International Platform of Registered Systematic Review and Meta-analysis Protocols INPLASY PROTOCOL Effects of Compound Danshen Dropping Pills on adverse cardiovascular events and quality of life after percutaneous coronary intervention in patients with coronary heart disease -A protocol for systematic review and meta-analysis

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