Anterior Versus Lateral/Posterolateral Left Ventricular Lead Position in CRT: A Systematic Review and Meta-Analysis

Area of Science:

• Cardiology
• Medical Devices
• Clinical Trials

Background:

• Cardiac resynchronization therapy (CRT) is a treatment for heart failure.
• Left ventricular (LV) lead placement is critical for CRT efficacy.
• Optimal LV lead positioning remains a subject of investigation.

Purpose of the Study:

• To compare clinical and echocardiographic outcomes of anterior versus lateral/posterolateral LV lead positioning in CRT patients.
• To evaluate the impact of LV lead placement on mortality, CRT response, and LVEF.
• To provide evidence for optimizing LV lead placement strategies.

Main Methods:

• Systematic review and meta-analysis following PRISMA guidelines.
• Searched PubMed, Embase, Web of Science, and Cochrane Library for relevant studies.
• Extracted data on mortality, CRT response, and LVEF; used random-effects model for pooled estimates.

Main Results:

• Lateral/posterolateral LV lead positioning significantly reduced mortality (HR 0.74).
• Higher CRT response rates were observed with lateral/posterolateral positioning (OR 1.40).
• Greater LVEF improvement was noted with optimal lead placement (mean difference 4.0%).

Conclusions:

• Lateral or posterolateral LV lead positioning is superior to anterior placement for CRT outcomes.
• Improved survival, response rates, and reverse remodeling are associated with optimal LV lead placement.
• Optimizing LV lead position can enhance clinical outcomes in CRT patients.