Pacemaker Lead Tip Heating in Abandoned and Pacemaker-attached Leads at 1.5 Tesla MRI

Overview

Journal J Magn Reson Imaging

Date 2011 Jan 29

PMID 21274985

Citations 51

Authors

Deborah A Langman

Ira B Goldberg

J Paul Finn

Daniel B Ennis

Affiliations

Soon will be listed here.

Abstract

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.

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