Pacemaker lead tip heating in abandoned and pacemaker-attached leads at 1.5 tesla MRI
Article first published online: 27 JAN 2011
Copyright © 2011 Wiley-Liss, Inc.
Journal of Magnetic Resonance Imaging
Volume 33, Issue 2, pages 426–431, February 2011
How to Cite
Langman, D. A., Goldberg, I. B., Finn, J. P. and Ennis, D. B. (2011), Pacemaker lead tip heating in abandoned and pacemaker-attached leads at 1.5 tesla MRI. J. Magn. Reson. Imaging, 33: 426–431. doi: 10.1002/jmri.22463
- Issue published online: 27 JAN 2011
- Article first published online: 27 JAN 2011
- Manuscript Accepted: 10 NOV 2010
- Manuscript Received: 5 MAR 2010
- magnetic resonance imaging;
- medical device safety;
- RF-induced heating;
- abandoned leads
To assess the risk of RF-induced heating in pacemaker-attached and abandoned leads using in vitro temperature measurements at 1.5 Tesla as a function of lead length.
Materials and Methods
Five custom lead lengths, 20–60 cm, were exposed to a uniform magnitude and phase radiofrequency electric field to examine the effect of lead length on pacemaker lead tip heating for pacemaker-attached and abandoned pacemaker leads.
Abandoned and pacemaker-attached leads show resonant heating behavior and maximum heating occurs at different lead lengths due to the differences in termination conditions. For clinical lead lengths (40–60 cm) abandoned leads exhibited greater lead tip heating compared with pacemaker-attached leads.
Current recommendations for MRI pacemaker safety should highlight the possible increased risk for patients with abandoned leads as compared to pacemaker-attached leads. J. Magn. Reson. Imaging 2011;33:426–431. © 2011 Wiley-Liss, Inc.