Reversal of Mechanical Dyssynchrony and Suppression of Atrial and Ventricular Ectopy With Left Bundle Branch Area Pacing

Left bundle branch area pacing (LBBAP) is an effective strategy for restoring electro mechanical synchrony; however, its potential to suppress a high burden of concomitant atrial and ventricular ectopy remains to be fully elucidated. We present a 57-year-old male patient with left bundle branch block (LBBB)-induced cardiomyopathy who experienced significant improvement in left ventricular ejection fraction (LVEF) and marked suppression of both premature ventricular contractions (PVCs) and supraventricular extrasystoles (SVEs) after LBBAP. At 6 months of follow-up, LVEF increased to 58%, PVCs decreased to 200 per day, and SVEs disappeared. LBBAP can reverse mechanical dyssynchrony and suppress a high burden of ectopy.