In vivo heating of pacemaker leads during magnetic resonance imaging.

Abstract:

AIMS:Magnetic resonance imaging (MRI) is well established as an important diagnostic tool in medicine. However, the presence of a cardiac pacemaker is usually regarded as a contraindication for MRI due to safety reasons. In this study, heating effects at the myocardium-pacemaker lead tip interface have been investigated in a chronic animal model during MRI at 1.5 Tesla. METHODS AND RESULTS:Pacemaker leads with additional thermocouple wires as temperature sensors were implanted in nine animals. Temperature increases of up to 20 degrees C were measured during MRI of the heart. Significant impedance and minor stimulation threshold changes could be seen. However, pathology and histology could not clearly demonstrate heat-induced damage. CONCLUSIONS:MRI may produce considerable heating at the lead tip. Changes of pacing parameters due to MRI could be seen in chronic experiments. Potential risk of tissue damage cannot be excluded even though no reproducible alterations at the histological level could be found.

journal_name

Eur Heart J

journal_title

European heart journal

authors

Luechinger R,Zeijlemaker VA,Pedersen EM,Mortensen P,Falk E,Duru F,Candinas R,Boesiger P

doi

10.1093/eurheartj/ehi009

subject

Has Abstract

pub_date

2005-02-01 00:00:00

pages

376-83; discussion 325-7

issue

4

eissn

0195-668X

issn

1522-9645

pii

ehi009

journal_volume

26

pub_type

杂志文章
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    pub_type: 杂志文章

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    pub_type: 杂志文章,评审

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    pub_type: 临床试验,杂志文章,随机对照试验

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    pub_type: 杂志文章

    doi:10.1093/eurheartj/ehx182

    authors: Franzone A,Pilgrim T,Arnold N,Heg D,Langhammer B,Piccolo R,Roost E,Praz F,Räber L,Valgimigli M,Wenaweser P,Jüni P,Carrel T,Windecker S,Stortecky S

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    pub_type: 杂志文章,随机对照试验

    doi:10.1093/eurheartj/ehn577

    authors: Wikstrom G,Blomström-Lundqvist C,Andren B,Lönnerholm S,Blomström P,Freemantle N,Remp T,Cleland JG,CARE-HF study investigators.

    更新日期:2009-04-01 00:00:00