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

被引：113

作者：

Langman, Deborah A. ^{[1
,2
]}

Goldberg, Ira B. ^{[3
]}

Finn, J. Paul ^{[1
,2
]}

Ennis, Daniel B. ^{[1
,2
]}

机构：

[1] Univ Calif Los Angeles, David Geffen Sch Med, Dept Radiol Sci, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Biomed Phys Interdept Program, Los Angeles, CA USA

[3] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90024 USA

来源：

JOURNAL OF MAGNETIC RESONANCE IMAGING | 2011年 / 33卷 / 02期

关键词：

magnetic resonance imaging; medical device safety; pacemaker; RF-induced heating; abandoned leads; IMPLANTABLE-CARDIOVERTER-DEFIBRILLATORS; MAGNETIC-RESONANCE; CARDIAC-PACEMAKERS; MANAGE COMPLICATIONS; IN-VIVO; SAFETY; EXTRACTION; ISSUES; RECOGNIZE; 1.5-TESLA;

D O I：

10.1002/jmri.22463

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

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 radio-frequency 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.

引用

页码：426 / 431

页数：6

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