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The morphological conditions of the permanent pacemaker lead extraction
D Kozłowski1, A Dubaniewicz, E Koźluk
12nd Department of Cardiac Diseases, Medical University of Gdansk, Poland. dkozl@amedec.amg.gda.pl
Folia Morphologica
|April 25, 2000
Summary
Pacemaker lead extraction can be risky due to anatomical changes from long-term implantation. Fibrous tissue and inflammation around leads complicate removal, increasing risks like tissue avulsion.
Area of Science:
- Cardiology
- Medical Device Research
- Anatomical Pathology
Background:
- Pacemaker lead extraction is standard for infectious complications.
- Morphological changes of pacing electrodes over time can impact extraction safety.
- Understanding these changes is crucial for patient outcomes.
Purpose of the Study:
- To evaluate the safety of pacemaker lead extraction.
- To assess the relationship between morphological changes in pacing electrodes and extraction safety.
- To investigate anatomical alterations associated with long-term pacemaker implantation.
Main Methods:
- Macroscopic anatomical analysis of 60 human hearts with explanted pacemakers.
- Examination of pacing electrodes and surrounding cardiac tissues.
- Assessment of lead-tissue interactions, including neointima and fibrous thickening.
Main Results:
- Tricuspid leaflet thickening observed in 73.3% of hearts.
- Inflammatory reactions and neointimal hyperplasia (average 5 mm) around electrodes in 86.6% of cases.
- Significant fibrous thickening and endocardial tissue coverage on electrode tips in 93.3% of hearts, complicating extraction.
Conclusions:
- Pacemaker lead extraction poses anatomical challenges, particularly with long-term implantation.
- Extraction success is inversely related to implantation duration, with risks of complications like tip fracture and myocardial avulsion.
- The study suggests extraction may be questionable in patients with long-dwelling pacing leads.