Multilevel Venous Obstruction in Patients with Cardiac Implantable Electronic Devices

Area of Science:

• Cardiology
• Vascular Medicine
• Medical Imaging

Background:

• The characteristics of multilevel lead-related venous stenosis/occlusion (MLVSO) and its impact on transvenous lead extraction (TLE) outcomes are not well understood.
• Investigating MLVSO is crucial for understanding complications and long-term prognosis in patients with cardiac implantable electronic devices (CIEDs).

Purpose of the Study:

• To identify risk factors associated with MLVSO in patients undergoing TLE.
• To evaluate the effectiveness of TLE procedures in patients with and without MLVSO.
• To assess the long-term survival rates in patients with MLVSO compared to those without venous obstruction.

Main Methods:

• Analysis of 3002 venograms performed prior to TLE procedures.
• Identification of risk factors for MLVSO using logistic regression.
• Comparison of procedural success rates and long-term survival between groups.

Main Results:

• Strong predictors of MLVSO include older age at first implantation, increased number of leads, coronary sinus lead placement, bilateral chest leads, and prior lead abandonment.
• MLVSO is associated with a higher likelihood of infectious complications and more complex TLE procedures with lower success rates.
• Long-term survival post-TLE is comparable between patients with and without MLVSO.

Conclusions:

• MLVSO is a significant risk factor for infectious complications in CIED patients undergoing TLE.
• Patients with MLVSO experience more challenging TLE procedures but have similar long-term survival.
• MLVSO provides a better measure of overall venous obstruction severity than localized narrowing.