Follow-up of robotically assisted left ventricular epicardial leads for cardiac resynchronization therapy.

To the Editor: Cardiac resynchronization therapy (CRT) via coronary sinus (CS) lead placement has been shown to improve heart failure (HF) symptoms ([1–3][1]). However, a 5% to 10% implant failure rate has resulted in alternative approaches for optimal CRT. Robotically assisted left ventricular (