Left bundle branch pacing in a patient with decreased cardiac function after transcatheter aortic valve replacement.

A case of an elderly patient with severe aortic valve regurgitation who underwent a detailed preoperative evaluation by a cardiac valve disease team was reported. The patient successfully underwent transcatheter aortic valve replacement via the transapical approach. Postoperatively, the patient developed complete left bundle branch block, leading to decreased left ventricular function. Despite guideline-directed medical therapy for heart failure, the cardiac function did not significantly improve. At 4.5 months post-surgery, the patient underwent left bundle branch pacing, which resulted in a marked improvement in cardiac function.