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Updated: May 16, 2026
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Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine
Published on: February 17, 2018
Pacemaker malfunction due to mechanical failure of the lead-header interface
Amanda E Coleman1, Teresa C Defrancesco, Guillaume Chanoit
1Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, 501 D.W. Brooks Drive, Athens, GA 30602, USA.
Summary
A Boxer dog experienced pacemaker complications due to a faulty lead-header connection, a rare mechanical issue. This case highlights potential issues with pacemaker implantation and lead integrity in veterinary cardiology.
Area of Science:
- Veterinary Cardiology
- Biomedical Engineering
- Canine Electrophysiology
Background:
- A Boxer dog with vasovagal syncope and arrhythmogenic right ventricular cardiomyopathy underwent epicardial pacemaker implantation.
- Routine follow-up revealed intermittent loss of ventricular capture and sensing issues.
- Chronic impedance data suggested lead-header interface failure or conductor fracture.
Observation:
- Radiographic and pacemaker interrogation findings indicated incomplete lead insertion into the device header.
- This resulted in variable pacemaker sensing and intermittent loss of ventricular capture.
- The complication was suspected to stem from a loose set screw or operator error during implantation.
Findings:
- Diagnosis of mechanical failure at the pacemaker lead-header interface.
- This specific complication has not been previously documented in veterinary patients.
- The findings point to a potential issue in device implantation or lead integrity.
Implications:
- Highlights a novel mechanical complication associated with pacemaker lead-header connections in veterinary medicine.
- Suggests the need for careful lead insertion and securing during pacemaker implantation procedures.
- Emphasizes the importance of thorough post-implantation evaluation to detect lead-related issues.
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