Taking into account the issue of heterogeneity, we will conduct a subgroup analysis based on the specific circumstances of the included literature. If there is a problem of heterogeneity, we will conduct a subgroup analysis of age, sex, and interventions. In addition, to understand whether the LVEF will affect the efficacy of SFQX, it will be used for CHF patients with LVEF <40% and CHF with unknown LVEF the TCM syndrome scores and NYHA classification are analyzed by subgroups.
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