lead fracture
A structural failure of a cardiac lead conductor resulting in loss of electrical continuity.
Full Definition
Lead fracture represents a mechanical failure of the lead's internal conductor wires, resulting in complete or intermittent loss of electrical connection between the pulse generator and the electrode. Fractures can occur anywhere along the lead body but are most common at stress points such as the ligature site, clavicular area, or near the lead connector. Lead fractures may present as sudden loss of capture, sensing failure, impedance changes, or inappropriate shock delivery. Modern leads incorporate improved conductor designs and materials to reduce fracture risk, but mechanical stress from patient movement and cardiac motion remains a long-term concern.
Usage
Usage note: Use 'lead fracture' rather than 'broken lead' in formal medical documentation.
In Context
- "Chest X-ray revealed a lead fracture at the level of the first rib." — Diagnostic imaging report
- "The sudden impedance rise suggested possible lead fracture requiring urgent evaluation." — Device interrogation alert