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Failure of automatic capture verification in an epicardial pacemaker system
Leonardo Liberman1, Allan J Hordof, Daphne S Hsu
1Division of Pediatric Cardiology, New York Presbyterian Hospital, Columbia University, New York, 10032 NY, USA. ll202@columbia.edu
Summary
Automatic threshold determination for epicardial pacing in pediatric congenital heart disease patients can be falsely low. This case highlights a risk of complete loss of capture due to lead fracture, despite seemingly adequate thresholds.
Area of Science:
- Cardiology
- Pediatric Electrophysiology
- Biomedical Engineering
Background:
- Epicardial pacing is a common technique for managing congenital heart disease in pediatric patients.
- Automatic threshold determination is generally considered safe for epicardial lead systems.
Observation:
- A case involving a pediatric patient with congenital heart disease who underwent epicardial pacing.
- The patient experienced a complete loss of capture despite the automatic threshold determination indicating adequate pacing thresholds.
Findings:
- The automatic capture verification system falsely reported low ventricular thresholds.
- A fractured epicardial lead was identified as the cause of the complete loss of capture.
Implications:
- This case underscores the potential for failure in automatic threshold determination systems for epicardial leads.
- Clinicians should maintain a high index of suspicion for lead integrity issues, even with seemingly normal automatic threshold measurements in pediatric patients.
- Further research may be needed to improve the reliability of automatic capture verification in challenging pediatric epicardial lead scenarios.