Interventricular lead separation is critical for NT-proBNP reduction after cardiac resynchronization therapy

Area of Science:

• Cardiology
• Medical Devices
• Biomarkers

Background:

• Cardiac resynchronization therapy (CRT) effectiveness can be influenced by pacing lead placement.
• The spatial relationship between left ventricular (LV) and right ventricular (RV) leads is a potential factor in CRT success.

Purpose of the Study:

• To investigate the impact of lead separation distance on NT-proBNP levels following CRT.
• To determine if greater LV-RV lead separation is associated with improved heart failure markers.

Main Methods:

• 132 patients undergoing CRT had NT-proBNP levels measured before and after therapy.
• Three-dimensional (3D) lead separation was calculated using postero-anterior and lateral chest radiography.

Main Results:

• A significant correlation was found between lead separation and NT-proBNP reduction (r = 0.25; p = 0.004).
• NT-proBNP levels decreased only in patients with lead separation in the upper two quartiles.
• Patients with worsening NT-proBNP had significantly less lead separation compared to those with improvement (148.0 ± 5.38 mm vs. 170.5 ± 4.21 mm; p = 0.0018).

Conclusions:

• LV-RV lead separation is a significant correlate of NT-proBNP improvement after CRT.
• NT-proBNP is a critical biomarker for heart failure status and prognosis.
• Optimizing lead separation during implantation may enhance CRT outcomes.