| Safety of magnetic resonance imaging in patients with permanent pacemakers: a collaborative clinical approach. | |
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MedLine Citation:
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PMID: 21938517 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE: This study aimed to characterize the interactions of pacemakers with magnetic resonance imaging (MRI) and to identify device characteristics that could predict adverse interactions. BACKGROUND: The safety of MRI in patients with indwelling pacemaker systems remains uncertain. Previous studies demonstrated safety in most patients, but unpredictable, potentially concerning changes in pacemaker behavior have occurred. METHODS: We prospectively studied patients with pacemaker devices in situ who were not pacemaker dependent and in whom MRI was essential for adequate diagnosis and treatment. All patients were monitored by electrocardiography and pulse oximetry during scanning; devices were interrogated and cardiac enzymes were measured before and after scanning. RESULTS: Of 32 patients studied (46 MRI examinations), 28 patients had a dual-chamber system and one had a biventricular device. Regions scanned were the head and spine. Devices were reprogrammed to asynchronous pacing or sense-only mode in all except six patients before MRI. During six scanning episodes (five patients), "power-on" resetting of the device was noted. Magnet-mode pacing was noted during four episodes (three patients). Occasional premature ventricular contractions were noted in one patient. No significant changes in battery voltage, sensed P wave and R wave, pacing thresholds, lead impedance, or cardiac enzymes were noted immediately after MRI or at 1-month follow-up. CONCLUSIONS: Overall, no significant changes were seen in pacemaker device function, and no adverse clinical events were observed. A minority of patients with older devices had unpredictable changes in device behavior, which stresses the need for close monitoring during and careful device interrogation after scanning. |
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Authors:
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Barry Anthony Boilson; Anita Wokhlu; Nancy G Acker; Joel P Felmlee; Robert E Watson; Paul R Julsrud; Paul A Friedman; Yong-Mei Cha; Robert F Rea; David L Hayes; Win-Kuang Shen |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-21 |
Journal Detail:
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Title: Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing Volume: - ISSN: 1572-8595 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-9-22 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9708966 Medline TA: J Interv Card Electrophysiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Division of Cardiovascular Diseases, Mayo Clinic, 200 First St SW, Rochester, MN, 55905, USA, boilson.barry@mayo.edu. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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