Left bundle branch pacing vs ventricular septal pacing for cardiac resynchronization therapy

Area of Science:

• Cardiology
• Electrophysiology
• Heart Failure Management

Background:

• Outcomes of left bundle branch pacing (LBBP) and left ventricular septal pacing (LVSP) for heart failure require further investigation.
• Cardiac resynchronization therapy (CRT) aims to improve heart failure symptoms and outcomes.

Purpose of the Study:

• To compare echocardiographic and clinical outcomes of LBBP, LVSP, and deep septal pacing (DSP).
• To evaluate the efficacy and safety of different septal pacing techniques in CRT candidates.

Main Methods:

• Retrospective study of 91 patients meeting CRT criteria who underwent attempted LBBP.
• Data collection included clinical, electrocardiographic, and echocardiographic parameters at baseline and follow-up.
• Patients were categorized into LBBP (n=52), LVSP (n=25), and DSP (n=14) groups.

Main Results:

• Significant left ventricular ejection fraction (LVEF) improvement observed in LBBP and LVSP groups (P < .001).
• No significant difference in heart failure hospitalization or all-cause death between LBBP and LVSP groups.
• DSP group showed increased heart failure hospitalization and all-cause deaths compared to LBBP (HR 5.10, P=.033; HR 7.83, P=.020).

Conclusions:

• Left ventricular septal pacing (LVSP) offers comparable cardiac resynchronization therapy (CRT) outcomes to left bundle branch pacing (LBBP).
• Deep septal pacing (DSP) is associated with poorer clinical outcomes compared to LBBP.