Permanent Left Bundle Branch Area DF-4 Defibrillator Lead Implantation-Feasibility, Procedural Caveats, Safety, and...

Area of Science:

• Cardiology
• Electrophysiology
• Medical Devices

Background:

• Permanent implantation of a DF-4 implantable cardiac defibrillator (ICD) lead in the left bundle branch area (LBBA) represents a novel approach combining cardiac resynchronization therapy (CRT) and defibrillation.
• Investigating the feasibility, success rates, procedural challenges, and complications of LBBA-ICD implantation is crucial for advancing cardiac device therapy.

Purpose of the Study:

• To systematically evaluate the feasibility and success rate of permanent DF-4 ICD lead implantation in the LBBA.
• To identify procedural caveats and complications associated with LBBA-ICD implantation.
• To assess short-term follow-up data, including device parameters and echocardiographic findings.

Main Methods:

• Prospective implantation of a 7 Fr Durata DF-4 ICD lead at the LBBA using a fixed-curve delivery sheath in 12 consecutive patients.
• LBBA capture was defined by standard criteria.
• Sensing, pacing, defibrillation, radiographic, and echocardiographic parameters were recorded at implant, discharge, and 5-month follow-up.

Main Results:

• Successful permanent LBBA ICD implantation with adequate sensing and pacing was achieved in 75% (9/12) of patients.
• Minor complications (transeptal perforation, micro-dislodgment) occurred in 25% (3/12) of patients.
• Effective sensing and defibrillation were achieved in all patients with successful implants, including inducible ventricular fibrillation (VF).

Conclusions:

• Permanent DF-4 LBBA ICD implantation is feasible and successful in 75% of indicated patients.
• A learning curve and dedicated toolkits may help mitigate the observed 25% complication rate.
• Short-term lead and right ventricular parameters demonstrated favorable outcomes.