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en the labor time, strengthen the analgesic effect, reduce the physiological and psychological stress reactions, increase the sense of control during birth and improve the delivery outcome as well as early pelvic floor function. To investigate the changes in the cardiac function and quality of life of patients with pacemaker-induced cardiomyopathy (PICM) after they upgrade to left bundle branch pacing (LBBP). Ten patients with PICM who upgraded to LBBP were recruited as the study cohort. The LBBP upgrade operations were all performed by the same cardiac int