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Updated: Jun 22, 2025
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Optocardiography and Electrophysiology Studies of Ex Vivo Langendorff-perfused Hearts
Published on: November 7, 2019
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Endocardial lead insulation wear in a scanning and optical microscope
Mateusz Ulman1, Krzysztof Boczar1, Katarzyna Holcman2,3
1Department of Electrocardiology, The John Paul II Hospital, Cracow, Poland.
Summary
Transvenous lead removal often causes insulation damage, particularly in the intra-pocket area. This study highlights the vulnerability of cardiovascular leads during explantation, emphasizing the need for careful removal techniques.
Area of Science:
- Cardiovascular medicine
- Biomaterials science
- Medical device engineering
Background:
- Cardiovascular lead path and interactions are influenced by implantation techniques and lead material composition.
- Lead materials can degrade over time, affecting device performance and patient safety.
Purpose of the Study:
- To investigate insulation wear on transvenous leads after removal.
- To identify specific lead regions most susceptible to damage during explantation.
Main Methods:
- Prospective analysis of patients undergoing transvenous lead explantation (TLE) at a single tertiary center.
- Examination of endocardial leads removed via simple screw-out and gentle traction.
- Microscopic evaluation using scanning electron and optical microscopy.
Main Results:
- Insulation damage was consistently observed across all evaluated leads (n=39).
- The intra-pocket lead segments showed significantly higher damage prevalence (OR: 9.112) compared to intravenous segments (OR: 0.323).
- A total of 347 damaged sites were identified, with 86 exhibiting lead unsealing.
Conclusions:
- All transvenous leads examined exhibited insulation damage post-explantation.
- The intra-pocket region of cardiovascular leads is significantly more vulnerable to damage than intravenous regions.
