Pseudofracture of an ICD lead

Area of Science:

• Cardiology
• Medical Device Engineering
• Radiology

Background:

• Implantable cardioverter-defibrillators (ICDs) are crucial for managing cardiac arrhythmias.
• Lead integrity is essential for effective ICD function and patient safety.
• Pseudofractures can compromise lead performance and lead to device malfunction.

Purpose of the Study:

• To report a case of proximal pseudofracture in a Medtronic 6936 defibrillating lead.
• To highlight the limitations of conventional X-ray in visualizing critical lead connections.
• To emphasize the importance of lead impedance monitoring during ICD procedures.

Main Methods:

• Radiographic examination (X-ray) was used to identify the lead abnormality.
• The anatomical location and nature of the pseudofracture were described.
• The clinical context of ICD replacement was noted.

Main Results:

• A proximal pseudofracture was detected on X-ray adjacent to the ICD pulse generator.
• The pseudofracture occurred at the multifilar metallic connector site where the stimulating lead joins.
• Conventional abdominal X-rays were insufficient to visualize this specific connection.

Conclusions:

• Proximal lead pseudofractures near the ICD pulse generator can occur.
• Standard X-rays may not reveal critical lead connector issues.
• Routine measurement of lead impedance during ICD replacement is vital for detecting lead integrity problems.