Leadless vs. Conventional Transvenous Pacemakers in Valve Intervention Patients: A Systematic Review & Meta-Analysis.

Area of Science:

• Cardiology
• Interventional Cardiology
• Biomedical Engineering

Background:

• Structural heart disease interventions frequently require permanent pacemaker implantation (PPI).
• Transvenous pacemakers (TVP) are standard but carry risks like infection.
• Leadless pacemakers (LP) offer an alternative to mitigate these risks.

Purpose of the Study:

• To compare the outcomes of leadless versus transvenous pacemaker implantation.
• To evaluate safety and efficacy in patients undergoing valve interventions.

Main Methods:

• Systematic review and meta-analysis of 5 cohort studies (10,494 participants).
• Compared outcomes including mortality, rehospitalization, and complications.
• Data analyzed using Comprehensive Meta-analysis (CMA).

Main Results:

• LP group (794 patients) showed higher mortality risk (RR=1.85) and longer hospital stay (MD=0.67 days).
• LP patients had lower ventricular pacing burden (MD=-11.39%).
• No significant differences in rehospitalization or device-related complications.

Conclusions:

• LP implantation is linked to reduced ventricular pacing but increased mortality and hospital stay versus TVP.
• Observed higher mortality with LP may stem from patient selection bias.
• Randomized controlled trials are essential to clarify comparative safety and minimize confounding.