Data abstraction
Using a structured data record form, the following information was
collected from each study:
(1) Basic information of literature: title, year of the study, name of
the first author, publication year, and the country where the study was
conducted
(2) Patient baseline characteristics, demographic data, and underlying
diseases
(3) Outcomes: the success rate of LBBAP implantations, QRSd,
echocardiographic findings including left ventricular ejection fraction
(LVEF), left ventricular end-diastolic volume (LVEDV), left ventricular
end-systolic volume (LVESV), left ventricular end-diastolic diameter
(LVEDD), left ventricular end-systolic diameter (LVESD), New York Heart
Association (NYHA) classification, B-type natriuretic peptide (BNP)
level, and pacing parameters (LBB capture threshold, lead impedance, and
R-wave amplitude)