Powering the heart: fully bioresorbable epicardial pacing leads

Area of Science:

• Biomaterials Science
• Cardiovascular Engineering
• Medical Device Innovation

Background:

• Conventional temporary epicardial pacing wires (TPWs) are essential for postoperative cardiac pacing but carry risks due to their non-biodegradable nature.
• Complications associated with non-degradable materials necessitate the development of safer alternatives for temporary cardiac pacing.

Purpose of the Study:

• To develop and evaluate a fully bioresorbable epicardial pacing lead.
• To assess the performance, degradation, and biocompatibility of a novel zinc-polymer pacing lead for temporary epicardial pacing.

Main Methods:

• Fabrication of a bioresorbable pacing lead using a pure zinc core and a bioresorbable polymer coating via dip-coating.
• Evaluation of pacing performance over 4 weeks in a rabbit model.
• Assessment of degradation behavior and tissue response in animal models.

Main Results:

• The zinc-polymer pacing leads demonstrated reliable pacing performance comparable to clinical benchmarks over a 4-week period.
• Stable bioresorption and acceptable biocompatibility were observed during and after the therapeutic period.
• The bioresorbable design successfully eliminated risks associated with non-degradable TPWs while maintaining therapeutic efficacy.

Conclusions:

• The developed zinc-polymer pacing lead offers a safe and effective alternative for temporary epicardial pacing.
• This bioresorbable design represents a significant advancement in cardiac pacing technology, enhancing patient safety.
• The novel lead combines therapeutic efficacy with improved biocompatibility and natural degradation, paving the way for next-generation pacing devices.