The Effects of Magnetic Resonance Imaging on Implantable Pulse Generators

David Holmes, DAVID L. HAYES, JOEL E. GRAY, JOHN MERIDETH

Research output: Contribution to journalArticle

58 Scopus citations

Abstract

The efects of magnetic resonance imaging were assessed on four dual chamber and two single chamber pulse generators. The tests were performed with a resistive, water‐cooled magnet operating at 0.15 T. The 6.4‐MHz radiofrequency (RF) field was operated at a maximum power of 1,000 watts with a period adjusted from 130 to 500 ms. Reed switch closure occurred in all six pulse generators tested when placed near the entrance of the magnetic resonance imaging scanner, and the generators reverted to asynchronous operation unless programmed to the “magnet of” mode. None of the pulse generators exhibited any alterations in programmed parameters or in the ability to be reprogrammed after RF pulsing. When the HF field was turned on, there was no change in the asynchronous paced cycle length in four pulse generators; however, during RF scanning there was rapid cardiac stimulation at the RF pulse period in one single chamber and one dual chamber pulse generator.

Original languageEnglish (US)
Pages (from-to)360-370
Number of pages11
JournalPacing and Clinical Electrophysiology
Volume9
Issue number3
DOIs
StatePublished - Jan 1 1986

Keywords

  • dual chamber pacemakers
  • magnetic resonance imaging
  • singie chamber pacemakers

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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