Results
After filtering out duplicate studies, our search strategy yielded 493
articles. After screening the abstracts, 458 studies that were case
reports, case series, review articles, in vitro studies, animal studies,
or interventional studies were eliminated from the study. The full text
of 35 studies was reviewed. The remaining 20 studies were later excluded
due to lack of a target population or failure to report outcomes of
interest. As a result, the final analysis included 15 observational
cohort studies [7-21] with 772 individuals with HFrEF who
underwent LBBAP implantation. The included articles were classified into
2 categories: patients with PICM (4 articles, 62 patients)[7-10] and patients without PICM (11 articles, 710
patients) [11-21] . Figure 1 shows the literature
review’s inclusion and exclusion process. Tables 1 and 2 show
the characteristics and quality assessment of the included studies.