Background: Conduction system pacing (CSP), often accomplished with lumenless pacing leads, is increasingly employed to achieve physiologic ventricular activation. Extraction of CSP leads has raised concerns about damage to the conduction system, lead...
Background: In some patients who receive a cardiac resynchronization therapy (CRT) device, the left ventricular ejection fraction (LVEF) does not improve.
Methods: We analyzed patients enrolled in the REVERSE, MADIT-CRT, and BLOCK-HF trials,...