Related Experiment Video
Updated: Jun 4, 2026
06:14
Translational Rabbit Model of Chronic Cardiac Pacing
Published on: January 6, 2023
Pacemaker lead tip heating in abandoned and pacemaker-attached leads at 1.5 Tesla MRI
Deborah A Langman1, Ira B Goldberg, J Paul Finn
1Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, California, USA. dlangman@mednet.ucla.edu
Journal of Magnetic Resonance Imaging : JMRI
|January 29, 2011
Summary
Abandoned pacemaker leads pose a higher risk of radiofrequency (RF)-induced heating during MRI scans compared to attached leads. This finding necessitates updated safety guidelines for patients with abandoned leads during magnetic resonance imaging.
Area of Science:
- Biomedical Engineering
- Medical Physics
- Cardiovascular Devices
Background:
- Magnetic Resonance Imaging (MRI) safety is a growing concern for patients with cardiovascular implantable electronic devices (CIEDs).
- Radiofrequency (RF)-induced heating of pacemaker leads during MRI is a potential risk that requires careful assessment.
- Abandoned leads, often left in situ after device replacement, may present unique heating characteristics.
Purpose of the Study:
- To evaluate the risk of RF-induced heating in both pacemaker-attached and abandoned leads.
- To investigate the influence of lead length on RF-induced heating at 1.5 Tesla using in vitro temperature measurements.
Main Methods:
- Five custom pacemaker lead lengths (20-60 cm) were tested.
- Leads were exposed to a uniform RF electric field to simulate MRI conditions.
- Temperature changes at the lead tips were measured for both pacemaker-attached and abandoned lead configurations.
Main Results:
- Both lead types exhibited resonant heating behavior.
- Maximum heating occurred at different lead lengths due to variations in termination conditions.
- At clinical lead lengths (40-60 cm), abandoned leads showed significantly greater tip heating than pacemaker-attached leads.
Conclusions:
- Abandoned pacemaker leads present a higher RF-induced heating risk during MRI compared to pacemaker-attached leads.
- Current MRI safety recommendations for pacemakers should explicitly address the increased risk associated with abandoned leads.
- Further research and updated guidelines are needed to ensure patient safety during MRI in the presence of abandoned leads.
