Optimization of right ventricular lead position in cardiac resynchronisation therapy

Area of Science:

• Cardiology
• Electrophysiology
• Heart Failure Management

Background:

• Biventricular pacing (BiV) effectiveness is influenced by lead placement.
• Optimal lead positioning is critical for maximizing BiV therapy benefits.

Purpose of the Study:

• To assess the impact of right ventricular (RV) lead positioning on clinical outcomes in BiV therapy.
• Investigate if RV lead placement influences reverse left ventricular (LV) remodeling.

Main Methods:

• Retrospective analysis of 99 heart failure patients receiving BiV systems.
• RV lead placement evaluated: midseptum (RVS group) vs. apex (RVA group).
• Clinical outcomes including NYHA class, VO(2)max, and LV dimensions assessed over time.

Main Results:

• The midseptal RV lead group (RVS) showed a trend towards improved NYHA class and a significant increase in VO(2)max.
• Significant reduction in LV end-diastolic diameter (LVEDD) observed in the RVS group (-3.4 mm) but not in the RVA group (+1.7 mm) at 12 months (p=0.004).
• LVEDD reduction was most pronounced in patients with dilated cardiomyopathy.

Conclusions:

• Midseptal RV lead placement is associated with favorable reverse LV remodeling during cardiac resynchronization therapy.
• This positioning may enhance the benefits of BiV therapy in heart failure patients.