Six-month electrical performance of the first dual-chamber leadless pacemaker

Area of Science:

• Cardiology
• Biomedical Engineering
• Medical Devices

Background:

• The novel dual-chamber leadless pacemaker (DC-LP) system utilizes two independent atrial and ventricular devices for synchronized pacing.
• Previous reports established the initial safety and efficacy of this groundbreaking technology.

Purpose of the Study:

• To assess the long-term electrical performance and stability of the dual-chamber leadless pacemaker (DC-LP) system.
• Evaluate the chronic electrical characteristics of the leadless pacemaker system over a six-month period.

Main Methods:

• Implantation of the DC-LP system (Aveir DR, Abbott) in patients requiring dual-chamber pacing.
• Monitoring of pacing capture thresholds, sensed amplitudes, and pacing impedance at regular intervals from implant to six months.

Main Results:

• Significant improvements in pacing capture thresholds and sensed amplitudes for both atrial and ventricular leadless pacemakers within the first month.
• Stable pacing impedances in atrial leadless pacemakers and a reduction in ventricular leadless pacemaker impedances.
• Electrical parameters remained consistent from one to six months post-implantation, irrespective of implant location.

Conclusions:

• The dual-chamber leadless pacemaker system demonstrated dependable electrical performance during the initial six-month evaluation.
• This study confirms the reliable chronic electrical function of the first dual-chamber leadless pacemaker system in human subjects.