Patients who meet the inclusion and exclusion criteria will be enrolled into the study. In the study, patients with cardiac dysfunction who met the enrollment criteria and will agree to participate in this trial will be 1:1 randomized to the LBBP group and the CRT group. Patients who were successfully implanted were enrolled for evaluation and follow-up. The primary end points of the study is the change of LVEF within 12 months post-implant in both LBBP Treatment Group and CRT Treatment Group
This study is a multicenter, prospective, randomized study to assess if cardiac dysfunction patients with LVEF <50% and the estimated ventricular pacing percentage >40% with LBBP have the non-inferior safety and efficacy than CRT on patients' cardiac function and prognosis