Minimally invasive implantable fetal micropacemaker: mechanical testing and technical refinements

Area of Science:

• Biomedical Engineering
• Fetal Cardiology
• Medical Device Design

Background:

• Fetal heart failure and hydrops fetalis can result from complete heart block.
• Previous preclinical trials faced challenges with myocardial fixation and pacing lead fatigue.

Purpose of the Study:

• To outline technical and safety requirements for fetal cardiac pacing.
• To present engineering strategies for a novel fetal micropacemaker and implantation system.
• To address and overcome challenges identified in earlier preclinical trials.

Main Methods:

• Systematic design and implementation of a novel fetal micropacemaker.
• Development of a percutaneous implantation system with a sterile package for clinical use.
• Analysis of myocardial fixation and pacing lead fatigue issues.
• Extensive mechanical performance testing of the implantable fetal micropacemaker and implantation system.

Main Results:

• A novel fetal micropacemaker and percutaneous implantation system were developed.
• Technical refinements addressed issues of myocardial fixation and pacing lead fatigue.
• Mechanical testing verified improved reliability and safety margins for the implantation system.

Conclusions:

• The developed fetal micropacemaker system offers improved reliability and safety for treating fetal complete heart block.
• Engineering strategies successfully overcame previous technical challenges in fetal cardiac pacing.
• This work advances the potential for clinical application of fetal cardiac pacing.