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Potential interference of small neodymium magnets with cardiac pacemakers and implantable cardioverter-defibrillators.

Abstract：

BACKGROUND:Magnetic fields may interfere with the function of cardiac pacemakers and implantable cardioverter-defibrillators (ICDs). Neodymium-iron-boron (NdFeB) magnets, which are small in size but produce strong magnetic fields, have become widely available in recent years. Therefore, NdFeB magnets may be associated with an emerging risk of device interference. OBJECTIVE:We conducted a clinical study to evaluate the potential of small NdFeB magnets to interfere with cardiac pacemakers and ICDs. METHODS:The effect of four NdFeB magnets (two spherical magnets 8 and 10 mm in diameter, a necklace made of 45 spherical magnets, and a magnetic name tag) was tested in forty-one ambulatory patients with a pacemaker and 29 patients with an ICD. The maximum distance at which the magnetic switch of a device was influenced was observed. RESULTS:Magnetic interference was observed in all patients. The maximum distance resulting in device interference was 3 cm. No significant differences were found with respect to device manufacturer and device types. CONCLUSION:Small NdFeB magnets may cause interference with cardiac pacemakers and ICDs. Patients should be cautioned about the interference risk associated with NdFeB magnets during daily life.

journal_name

Heart Rhythm

journal_title

Heart rhythm

authors

Wolber T,Ryf S,Binggeli C,Holzmeister J,Brunckhorst C,Luechinger R,Duru F

doi

10.1016/j.hrthm.2006.09.012

subject

Has Abstract

pub_date

2007-01-01 00:00:00

pages

1-4

issue

1

eissn

1547-5271

issn

1556-3871

pii

S1547-5271(06)01962-X

journal_volume

4

pub_type

杂志文章

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