| Pacemaker lead tip heating in abandoned and pacemaker-attached leads at 1.5 tesla MRI. | |
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MedLine Citation:
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PMID: 21274985 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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PURPOSE: 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. RESULTS: 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. CONCLUSION: 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. |
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Authors:
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Deborah A Langman; Ira B Goldberg; J Paul Finn; Daniel B Ennis |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of magnetic resonance imaging : JMRI Volume: 33 ISSN: 1522-2586 ISO Abbreviation: J Magn Reson Imaging Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-01-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9105850 Medline TA: J Magn Reson Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 426-31 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 Wiley-Liss, Inc. |
Affiliation:
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Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, California, USA; Biomedical Physics Interdepartmental Program, University of California, Los Angeles, California, USA. dlangman@mednet.ucla.edu. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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