Limitations
Our meta-analysis had several limitations: First, only one study included in our analysis was a randomized control trial and the other 9 were observational studies, which can potentially introduce confounding factors and compromise the interpretation of results. Second, all 10 studies had a relatively small sample size and short follow-up period, limiting the power to assess the long-term outcome and safety of LBBP. Third, the definition and classification of data reporting in different studies varies (e.g. definition of implant success, use of BNP versus N-terminal-pro BNP, etc.) thereby limiting further data extraction and analysis.