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Ra J, Oberdier MT, Suzuki M, Vaidya D, Liu Y, Hansford R, McVeigh D, Weltin V, Tao S, Thiemann DR, Nazarian S, Halperin HR. Implantable Defibrillator System Shock Function, Mortality, and Cause of Death After Magnetic Resonance Imaging. Ann Intern Med 2023; 176:289-297. [PMID: 36716451 DOI: 10.7326/m22-2653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Studies have shown that magnetic resonance imaging (MRI) does not have clinically important effects on the device parameters of non-MRI-conditional implantable cardioverter-defibrillators (ICDs). However, data on non-MRI-conditional ICD detection and treatment of arrhythmias after MRI are limited. OBJECTIVE To examine if non-MRI-conditional ICDs have preserved shock function of arrhythmias after MRI. DESIGN Prospective cohort study. (ClinicalTrials.gov: NCT01130896). SETTING 1 center in the United States. PATIENTS 629 patients with non-MRI-conditional ICDs enrolled consecutively between February 2003 and January 2015. INTERVENTIONS 813 total MRI examinations at a magnetic field strength of 1.5 Tesla using a prespecified safety protocol. MEASUREMENTS Implantable cardioverter-defibrillator interrogations were collected after MRI. Clinical outcomes included arrhythmia detection and treatment, generator or lead exchanges, adverse events, and death. RESULTS During a median follow-up of 2.2 years from MRI to latest available ICD interrogation before generator or lead exchange in 536 patients, 4177 arrhythmia episodes were detected, and 97 patients received ICD shocks. Sixty-one patients (10% of total) had 130 spontaneous ventricular tachycardia or fibrillation events terminated by ICD shocks. A total of 210 patients (33% of total) are known to have died (median, 1.7 years from MRI to death); 3 had cardiac arrhythmia deaths where shocks were indicated without direct evidence of device dysfunction. LIMITATIONS Data were acquired at a single center and may not be generalizable to other clinical settings and MRI facilities. Implantable cardioverter-defibrillator interrogations were not available for a subset of patients; adjudication of cause of death relied solely on death certificate data in a subset. CONCLUSION Non-MRI-conditional ICDs appropriately treated detected tachyarrhythmias after MRI. No serious adverse effects on device function were reported after MRI. PRIMARY FUNDING SOURCE Johns Hopkins University and National Institutes of Health.
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Affiliation(s)
- Joshua Ra
- Department of Medicine, University of California San Francisco, San Francisco, California (J.R.)
| | - Matt T Oberdier
- Department of Cardiology, Johns Hopkins University, Baltimore, Maryland (M.T.O., M.S., D.V., R.H., D.M., V.W., S.T., D.R.T.)
| | - Masahito Suzuki
- Department of Cardiology, Johns Hopkins University, Baltimore, Maryland (M.T.O., M.S., D.V., R.H., D.M., V.W., S.T., D.R.T.)
| | - Dhananjay Vaidya
- Department of Cardiology, Johns Hopkins University, Baltimore, Maryland (M.T.O., M.S., D.V., R.H., D.M., V.W., S.T., D.R.T.)
| | - Yisi Liu
- Department of Pediatrics, Johns Hopkins University, Baltimore, Maryland (Y.L.)
| | - Rozann Hansford
- Department of Cardiology, Johns Hopkins University, Baltimore, Maryland (M.T.O., M.S., D.V., R.H., D.M., V.W., S.T., D.R.T.)
| | - Diana McVeigh
- Department of Cardiology, Johns Hopkins University, Baltimore, Maryland (M.T.O., M.S., D.V., R.H., D.M., V.W., S.T., D.R.T.)
| | - Valeria Weltin
- Department of Cardiology, Johns Hopkins University, Baltimore, Maryland (M.T.O., M.S., D.V., R.H., D.M., V.W., S.T., D.R.T.)
| | - Susumu Tao
- Department of Cardiology, Johns Hopkins University, Baltimore, Maryland (M.T.O., M.S., D.V., R.H., D.M., V.W., S.T., D.R.T.)
| | - David R Thiemann
- Department of Cardiology, Johns Hopkins University, Baltimore, Maryland (M.T.O., M.S., D.V., R.H., D.M., V.W., S.T., D.R.T.)
| | - Saman Nazarian
- Department of Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania (S.N.)
| | - Henry R Halperin
- Department of Cardiology and Departments of Radiology and Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland (H.R.H.)
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Arduino A, Bottauscio O, Chiampi M, Zanovello U, Zilberti L. A contribution to MRI safety testing related to gradient-induced heating of medical devices. Magn Reson Med 2022; 88:930-944. [PMID: 35344605 PMCID: PMC9314691 DOI: 10.1002/mrm.29235] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 01/22/2022] [Accepted: 02/24/2022] [Indexed: 12/26/2022]
Abstract
PURPOSE To theoretically investigate the feasibility of a novel procedure for testing the MRI gradient-induced heating of medical devices and translating the results into clinical practice. METHODS The concept of index of stress is introduced by decoupling the time waveform characteristics of the gradient field signals from the field spatial distribution within an MRI scanner. This index is also extended to consider the anisotropy of complex bulky metallic implants. Merits and drawbacks of the proposed index of stress are investigated through virtual experiments. In particular, the values of the index of stress evaluated for realistic orthopedic implants placed within an ASTM phantom are compared with accurate heating simulations performed with 2 anatomic body models (a man and a woman) implanted through a virtual surgery procedure. RESULTS The manipulation of the proposed index of stress allows to identify regions within the MRI bore where the implant could affect the safety of the examinations. Furthermore, the conducted analysis shows that the power dissipated into the implant by the induced eddy currents is a dosimetric quantity that estimates well the maximum temperature increase in the tissues surrounding the implant. CONCLUSION The results support the adoption of an anisotropic index of stress to regulate the gradient-induced heating of geometrically complex implants. They also pave the way for a laboratory characterization of the implants based on electrical measurements, rather than on thermal measurements. The next step will be to set up a standardized experimental procedure to evaluate the index of stress associated with an implant.
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Affiliation(s)
| | | | - Mario Chiampi
- Istituto Nazionale di Ricerca Metrologica (INRIM), Torino, Italy
| | | | - Luca Zilberti
- Istituto Nazionale di Ricerca Metrologica (INRIM), Torino, Italy
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Is diversity harmful?-Mixed-brand cardiac implantable electronic devices undergoing magnetic resonance imaging. Wien Klin Wochenschr 2021; 134:286-293. [PMID: 34402991 PMCID: PMC9023390 DOI: 10.1007/s00508-021-01924-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 07/09/2021] [Indexed: 11/22/2022]
Abstract
Background Many patients with cardiac implantable electronic devices (CIED) undergo magnetic resonance imaging (MRI); however, a relevant proportion have a CIED system that has not been classified as MRI-conditional because of generators and leads from different brands (mixed-brand group). The available data concerning the outcome of these mixed patients undergoing MRI is limited. Methods A retrospective single center study, including all patients with CIEDs undergoing MRI between January 2013 until May 2020, was performed. Primary endpoints were defined as death or any adverse event necessitating hospitalization or CIED revision. Secondary endpoints were the occurrence of any sign for beginning device or lead failure or patient discomfort during MRI. Results A total of 227 MRI examinations, including 10 thoracic MRIs, were carried out in 158 patients, with 1–9 MRIs per patient. Of the patients 38 underwent 54 procedures in the mixed-brand group and 89 patients underwent 134 MRIs in the MRI-conditional group. Of the patients 31 were excluded since the MRI conditionality could not be determined. No primary endpoints occurred within the mixed-brand group but in 2.2% of the MRI-conditional group (p = 1.000), with 2 patients developing new atrial fibrillation during MRI, of whom one additionally had a transient CIED dysfunction. No secondary endpoints were met in the mixed-brand group compared to 3.4% in the MRI-conditional group (p = 0.554). No complications occurred in the excluded patients. Conclusion The complication rate of CIED patients undergoing MRI was low. Patients with a mixed CIED system showed no signs of increased risk of adverse events compared to patients with MRI-conditional CIED systems. Supplementary Information The online version of this article (10.1007/s00508-021-01924-w) contains supplementary material, which is available to authorized users.
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Dahiya G, Wetzel A, Kyvernitakis A, Gevenosky L, Williams R, Shah M, Farah V, Doyle M, Biederman RW. Impact of magnetic resonance imaging on functional integrity of non-conditional cardiovascular implantable electronic devices. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2021; 44:1312-1319. [PMID: 34133778 DOI: 10.1111/pace.14298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 06/03/2021] [Accepted: 06/14/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Cardiovascular implantable electronic devices (CIEDs) have historically restricted the use of magnetic resonance imaging (MRI) due to the potential clinical and configurational risks associated with electromagnetic interference. In this study, the authors investigated the impact of MRI on the functional integrity of non-conditional CIEDs and their clinical correlates. METHODS In this prospective, observational single-center study, we enrolled patients undergoing MRI over a 5-year period. Prior to assessing the impact of MRI on CIEDs, we performed interrogations in sequential duplication to assess the intrinsic variability of devices. Subsequently, we performed interrogations immediately after MRI, and monitored changes in device parameters and clinical events. RESULTS We completed 492 MRI studies, 58% in patients with permanent pacemakers (PPMs) and 42% with implantable cardioverter defibrillators (ICDs). Subsequent MRI exposures occurred in 15% encounters. Accounting for intrinsic variability in CIED leads, there were no significant changes in RA, RV, or LV parameters after MRI, regardless of the region imaged (thoracic vs. non-thoracic), type of CIED (PPMs vs. ICDs) and among those with serial MRIs. When ranked for % change pre- to post-MRI, the majority of RA, RV, and LV metrics for thresholds, sensing, and impedance conformed to ≤20% change from baseline. No significant clinical adverse cardiac events or effect on device microcircuitry occurred during the study. CONCLUSION Incorporating a novel reproducibility tactic, there were neither clinically meaningful device parameter changes nor adverse clinical events during or following MRIs, suggesting the effects of MRI on non-conditional CIED integrity are far less than previously perceived.
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Affiliation(s)
- Garima Dahiya
- Departments of Cardiovascular Disease, University of Minnesota, Minneapolis, Minnesota, USA
| | - Adam Wetzel
- Radiology, The Cleveland Clinic Foundation, Cleveland, Ohio, USA
| | - Andreas Kyvernitakis
- Cardiovascular Disease, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA
| | - Loretta Gevenosky
- Cardiovascular Disease, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA.,Center for Cardiovascular MRI Research and Development, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA
| | - Ronald Williams
- Cardiovascular Disease, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA.,Center for Cardiovascular MRI Research and Development, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA
| | - Moneal Shah
- Cardiovascular Disease, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA.,Center for Cardiovascular MRI Research and Development, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA
| | - Victor Farah
- Cardiovascular Disease, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA
| | - Mark Doyle
- Cardiovascular Disease, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA.,Center for Cardiovascular MRI Research and Development, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA
| | - Robert Ww Biederman
- Cardiovascular Disease, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA.,Center for Cardiovascular MRI Research and Development, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA
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Mangini F, Samar H, Gevenosky L, Williams RB, Shah M, Doyle M, Yamrozik JA, Lombardi R, Bonnet CA, Mansour A, Biederman RWW. Where do we go from here? Beyond the MagnaSafe trial: A focus beyond a 'safety-first' notion. An MRI study in 500 consecutive patients. Int J Cardiol 2021; 336:113-120. [PMID: 34029619 DOI: 10.1016/j.ijcard.2021.05.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 04/21/2021] [Accepted: 05/14/2021] [Indexed: 01/18/2023]
Abstract
BACKGROUND In patients with conventional pacemakers or ICD's, MRI is infrequently performed due to safety concerns. Recent reports have allayed many of these concerns. However, the additive clinical value of scanning patients with cardiac implants has not been established. OBJECTIVE Assessing the additive value of thoracic and non-thoracic MRI in patients with implantable cardiac devices. METHODS AND RESULTS Prospective data were analyzed in 500 patients with implanted cardiac devices that underwent MRI over a 12 year period at a single institution (Allegheny General Hospital, Pittsburgh, PA). A set of three questions were answered following scan interpretation by both the MRI technologist and interpreting MRI physician(s): 1) Did the primary diagnosis change? 2) Did MRI provide additional information to the existing diagnosis? 3) Did patient management change? If 'Yes' was answered to any of the above questions, it was considered that the MRI scan was of value to patient diagnosis and/or guiding therapy. Scans encountered were neurological/neurosurgical 354 (70.8%), cardiac 98 (19.6%) and orthopedic 48 (9.6%) in nature. In 431 (86%) MRI added additional information to the primary diagnosis and in 277 (55.4%) MRI changed the primary diagnosis. In 304 (60.8%) cases management changed, 265 (53%) due to a change in diagnosis and in 39 (7.8%) due to providing additional information. No safety issues were encountered and no adverse effects of MRI scan were noted. CONCLUSIONS MRI in patients with implanted cardiac devices was of additive value to diagnosis and management thereby informing risk-benefit considerations. CONDENSED ABSTRACT 500 patients with implanted cardiac devices who underwent a MRI examination over a 12 year period were followed prospectively. Imaging primarily focus on three anatomical regions (neurological/neurosurgical, cardiac and orthopedic) providing added information to the primary diagnosis in 431 (86%) cases and changing the primary diagnosis in 277 (55.4%) cases. In 304 (60.8%) cases management changed with 265 (53%) being due to a change of diagnosis and in 39 (7.8%) due to providing additional information. No safety issues were encountered using a defined protocol. CONCLUSIONS MR imaging retains its diagnostic yield in patients with implanted devices.
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Affiliation(s)
- Francesco Mangini
- Cardiovascular Unit, "Dario Camberlingo" Hospital, ASL Br, Francavilla Fontana (Br), Italy - Cardiac MRI Unit - "Di Summa - Perrino" Hospital, ASL BR, Brindisi, Italy.
| | - Huma Samar
- Division of Cardiology, Centre for Cardiac MRI, Allegheny General Hospital, Allegheny Health Network, East North Ave, Pittsburgh, PA, USA; Loma Linda Veterans Affairs Hospital, Benton Street, Loma Linda, CA, USA.
| | - Loretta Gevenosky
- Division of Cardiology, Centre for Cardiac MRI, Allegheny General Hospital, Allegheny Health Network, East North Ave, Pittsburgh, PA, USA.
| | - Ronald B Williams
- Cardiovascular Institute, Allegheny Health Network, 320 East North Ave, Pittsburgh, PA, USA.
| | - Moneal Shah
- Division of Cardiology, Centre for Cardiac MRI, Allegheny General Hospital, Allegheny Health Network, East North Ave, Pittsburgh, PA, USA; Cardiovascular Institute, Allegheny Health Network, 320 East North Ave, Pittsburgh, PA, USA.
| | - Mark Doyle
- Cardiovascular Institute, Allegheny Health Network, 320 East North Ave, Pittsburgh, PA, USA.
| | - June A Yamrozik
- Division of Cardiology, Centre for Cardiac MRI, Allegheny General Hospital, Allegheny Health Network, East North Ave, Pittsburgh, PA, USA; Cardiovascular Institute, Allegheny Health Network, 320 East North Ave, Pittsburgh, PA, USA.
| | - Richard Lombardi
- Division of Cardiology, Centre for Cardiac MRI, Allegheny General Hospital, Allegheny Health Network, East North Ave, Pittsburgh, PA, USA.
| | - Christopher A Bonnet
- Cardiovascular Institute, Allegheny Health Network, 320 East North Ave, Pittsburgh, PA, USA; Division of Electrophysiology, Cardiovascular Institute, Allegheny Health Network, East North Ave, Pittsburgh, PA, USA.
| | - Anas Mansour
- Eastern Maine Medical Center, 302 Husson Ave, Bangor, ME, USA.
| | - Robert W W Biederman
- Division of Cardiology, Centre for Cardiac MRI, Allegheny General Hospital, Allegheny Health Network, East North Ave, Pittsburgh, PA, USA; Cardiovascular Institute, Allegheny Health Network, 320 East North Ave, Pittsburgh, PA, USA.
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6
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Ryan JW, Murray AS, Gilligan PJ, Bisset JM, Nolan C, Doyle A, Emerson B, Galvin JM, Murray JG. MRI safety management in patients with cardiac implantable electronic devices: Utilizing failure mode and effects analysis for risk optimization. Int J Qual Health Care 2020; 32:431-437. [PMID: 32578847 DOI: 10.1093/intqhc/mzaa067] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 06/13/2020] [Accepted: 06/20/2020] [Indexed: 12/22/2022] Open
Abstract
INTRODUCTION Cardiac implantable electronic devices (CIEDs) are increasing in prevalence. Exposing patients with CIEDs to magnetic resonance imaging (MRI) can lead to adverse outcomes. This has led certain radiology departments to not accept MRI referrals related to patients with CIEDs. Patients with MR-conditional CIEDs can be safely scanned under specific conditions. Our institution has accepted such referrals since 2014. The aim of this study was to systematically identify and reduce risk in our CIED-MRI protocol using failure mode and effects analysis (FMEA). METHODS A multidisciplinary FMEA team was assembled and included senior stakeholders from the CIED-MRI protocol. A process map was constructed followed by risk analysis and scoring. Targeted interventions were formulated and implemented; high-risk failure modes were prioritized. A new process map and protocol were drafted and repeat risk analysis was performed. Monitoring and re-evaluation of the CIED-MRI pathway were instigated at departmental quality assurance (QA) meetings. RESULTS Interventions included direct CIED characterization using wireless technology pre-MRI, CIED programming and reprogramming in the MRI suite before and immediately after MRI reducing device downtime and continuous patient monitoring during MRI by a cardiac physiologist. The cumulative risk priority number (RPN) decreased from 1190 pre-FMEA to 492 post-FMEA. DISCUSSION Despite the risk of exposing CIEDs to the MR environment, patients with MR-conditional CIEDs can be safely scanned with an appropriate multidisciplinary support. We found FMEA an indispensable tool in identifying and minimizing risk with no adverse events recorded since FMEA recommendations were implemented.
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Affiliation(s)
- James W Ryan
- Mater Private Hospital, Eccles Street, Dublin, Ireland
| | | | | | | | - Chris Nolan
- Mater Private Hospital, Eccles Street, Dublin, Ireland
| | - Audrey Doyle
- Mater Private Hospital, Eccles Street, Dublin, Ireland
| | - Barry Emerson
- Mater Private Hospital, Eccles Street, Dublin, Ireland
| | | | - John G Murray
- Mater Private Hospital, Eccles Street, Dublin, Ireland
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Provision of MR imaging for patients with cardiac implantable electronic devices (CIEDs): a single-center experience and national survey. Ir J Med Sci 2018; 188:999-1004. [PMID: 30368645 DOI: 10.1007/s11845-018-1922-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 10/20/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND Patients with cardiac implantable electronic devices (CIEDs) were traditionally denied access to MR imaging due to safety concerns. AIMS The aim of this study was to review a single-center experience of MR imaging at 1.5T of patients with CIEDs and survey national availability of this service. METHODS Three hundred thirty-four patients with CIEDs were included in the review. Two hundred nine patients did not progress to MRI due to non MR-conditional CIEDs, retained pacing leads, recent implant insertion, and other patient factors. A record was made of CIED type, number of body parts imaged, numbers of repeat studies and complications. All devices were scanned with cardiology involvement. RESULTS One hundred twenty-five patients, 90 males, 35 females, aged 20-91 years progressed to MR imaging. Eighty-six patients had pacemakers, 15 had implantable cardioverter devices (ICDs), and 24 had implantable loop recorders (ILRs). Twenty-one patients had more than one body part scanned. Regions scanned included spine n = 82, joints n = 42, head n = 40, heart n = 8, and abdomen/pelvis n = 13. Twenty-six patients had multiple separate MR studies (range 2-6). Three complications included diaphragmatic stimulation when the device was switched to MR-conditional mode resulting in scan abandonment, device failure post-MRI requiring manufacturer reprogramming, and patient dizziness post reprogramming requiring cardiology review. One cardiac study was non-diagnostic due to artifact from a low left-sided ICD. Imaging of patients with pacemakers is available in 14 of 42 (38%) hospitals with MR units nationally. CONCLUSION MR-conditional CIEDs can be safely scanned with diagnostic quality at 1.5T using a protocol involving radiology and cardiology.
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Markman TM, Halperin HR, Nazarian S. Update on MRI Safety in Patients with Cardiac Implantable Electronic Devices. Radiology 2018; 288:656-657. [DOI: 10.1148/radiol.2018180360] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Timothy M. Markman
- From the Division of Cardiology, Section for Cardiac Electrophysiology, Hospital of the University of Pennsylvania, 3400 Spruce St, Founders 9118, Philadelphia, PA 19104 (T.M.M., S.N.); Division of Cardiology, Section for Cardiac Electrophysiology (H.R.H., S.N.), and Departments of Radiology and Biomedical Engineering (H.R.H.), The Johns Hopkins University, Baltimore, Md
| | - Henry R. Halperin
- From the Division of Cardiology, Section for Cardiac Electrophysiology, Hospital of the University of Pennsylvania, 3400 Spruce St, Founders 9118, Philadelphia, PA 19104 (T.M.M., S.N.); Division of Cardiology, Section for Cardiac Electrophysiology (H.R.H., S.N.), and Departments of Radiology and Biomedical Engineering (H.R.H.), The Johns Hopkins University, Baltimore, Md
| | - Saman Nazarian
- From the Division of Cardiology, Section for Cardiac Electrophysiology, Hospital of the University of Pennsylvania, 3400 Spruce St, Founders 9118, Philadelphia, PA 19104 (T.M.M., S.N.); Division of Cardiology, Section for Cardiac Electrophysiology (H.R.H., S.N.), and Departments of Radiology and Biomedical Engineering (H.R.H.), The Johns Hopkins University, Baltimore, Md
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Shah AD, Morris MA, Hirsh DS, Warnock M, Huang Y, Mollerus M, Merchant FM, Patel AM, Delurgio DB, Patel AU, Hoskins MH, El Chami MF, Leon AR, Langberg JJ, Lloyd MS. Magnetic resonance imaging safety in nonconditional pacemaker and defibrillator recipients: A meta-analysis and systematic review. Heart Rhythm 2018; 15:1001-1008. [DOI: 10.1016/j.hrthm.2018.02.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Indexed: 11/29/2022]
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Bertelsen L, Petersen HH, Philbert BT, Svendsen JH, Thomsen C, Vejlstrup N. Safety of magnetic resonance scanning without monitoring of patients with pacemakers. Europace 2018; 19:818-823. [PMID: 27738069 DOI: 10.1093/europace/euw066] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 02/15/2016] [Indexed: 11/13/2022] Open
Abstract
Aims The objective of this study was to investigate whether it is safe to perform 1.5-Tesla magnetic resonance imaging (MRI) scans in pacemaker (PM) patients without pulse oximetry or electrocardiogram monitoring and with no special specific absorption rate (SAR) or time limits, provided that the PMs are interrogated and programmed to asynchronous mode prior to the scan. Methods and results This study reports the outcome of 207 MRI scans on PM patients at Rigshospitalet, Copenhagen University Hospital from June 2010 to September 2013. All MRIs were performed with the PMs in asynchronous mode and without additional monitoring. There were no adverse events registered among the PM patients during the study period. The only statistically significant change after MRI scans was a small, but clinically insignificant increase in atrial sense. No occurrences of reprogramming to power-on-reset were registered. Conclusion It is possible to perform MRI scans relatively safely in PM patients without additional monitoring or change in the normal MRI protocol, given that the PM has been assessed and reprogrammed prior to MRI. This is especially important to remember in the acute setting where MRI scans may be delayed when monitoring facilities are unavailable.
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Affiliation(s)
- Litten Bertelsen
- Department of Cardiology, The Heart Centre, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, Copenhagen 2100, Denmark
| | - Helen Høgh Petersen
- Department of Cardiology, The Heart Centre, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, Copenhagen 2100, Denmark
| | - Berit Thornvig Philbert
- Department of Cardiology, The Heart Centre, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, Copenhagen 2100, Denmark
| | - Jesper Hastrup Svendsen
- Department of Cardiology, The Heart Centre, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, Copenhagen 2100, Denmark.,Danish National Research Foundation Centre for Cardiac Arrhythmia (DARC), Copenhagen, Denmark.,Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Carsten Thomsen
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Radiology, The Diagnostic Centre, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Niels Vejlstrup
- Department of Cardiology, The Heart Centre, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, Copenhagen 2100, Denmark
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Planken R, Leiner T, Nijenhuis R, Duijm L, Cuypers P, Douwes-Draaijer P, Van Der Sande F, Kessels A, Tordoir J. Contrast-Enhanced Magnetic Resonance Angiography Findings Prior to Hemodialysis Vascular access Creation: A Prospective Analysis. J Vasc Access 2018. [DOI: 10.1177/112972980800900408] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Purpose To determine prospectively the clinical value of contrast-enhanced magnetic resonance angiography (CE-MRA) for assessment of the arterial inflow and venous outflow prior to vascular access (VA) creation. Methods Seventy-three patients underwent duplex ultrasonography (DUS) and CE-MRA prior to VA creation for detection of stenoses and occlusions. Two observers read the CE-MRA images for determination of inter-observer agreement. A VA was considered functional if it could be used for successful two-needle hemodialysis therapy within 2 months after creation. Results CE-MRA detected 6 stenosed, 8 occluded arterial vessel segments and 12 stenosed and 41 occluded venous vessel segments in 70 patients. Inter-observer agreement for detection of upper extremity arterial and venous stenoses and occlusions with CE-MRA was substantial to almost perfect (kappa values 0.76–0.96). CE-MRA detected lesions, not detected by DUS, that were associated with VA early failure and non-maturation in 33% of patients (7/21). Accessory veins detected preoperatively were the cause of VA non-maturation in a substantial group of patients (47%: 7/15). Conclusion CE-MRA enables accurate detection of upper extremity arterial and venous stenosis and occlusions prior to VA creation. Preoperative CE-MRA identified arterial and venous stenoses, not detected by DUS that were associated with VA early failure and non-maturation. However, the use of gadolinium containing contrast media is currently contraindicated due the reported incidence of nephrogenic systemic fibrosis.
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Affiliation(s)
- R.N. Planken
- Department of Vascular Surgery, Maastricht University Hospital, Maastricht University Medical School - The Netherlands
- Department of Radiology, Maastricht University Hospital, Maastricht University Medical School - The Netherlands
- Cardiovascular Research Institute Maastricht, Maastricht - The Netherlands
| | - T. Leiner
- Department of Radiology, Maastricht University Hospital, Maastricht University Medical School - The Netherlands
- Cardiovascular Research Institute Maastricht, Maastricht - The Netherlands
| | - R.J. Nijenhuis
- Department of Vascular Surgery, Maastricht University Hospital, Maastricht University Medical School - The Netherlands
- Department of Radiology, Maastricht University Hospital, Maastricht University Medical School - The Netherlands
- Cardiovascular Research Institute Maastricht, Maastricht - The Netherlands
| | - L.E. Duijm
- Department of Radiology, Catharina Hospital Eindhoven - The Netherlands
| | - P.W. Cuypers
- Department of Surgery, Catharina Hospital Eindhoven - The Netherlands
| | - P. Douwes-Draaijer
- Department of Nephrology, Catharina Hospital Eindhoven - The Netherlands
| | - F.M. Van Der Sande
- Cardiovascular Research Institute Maastricht, Maastricht - The Netherlands
- Department of Nephrology, Maastricht University Hospital, Maastricht University Medical School - The Netherlands
| | - A.G. Kessels
- Department of Clinical Epidemiology and Medical Technology Assessment, Maastricht - The Netherlands
| | - J.H. Tordoir
- Department of Vascular Surgery, Maastricht University Hospital, Maastricht University Medical School - The Netherlands
- Cardiovascular Research Institute Maastricht, Maastricht - The Netherlands
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An eight-year prospective controlled study about the safety and diagnostic value of cardiac and non-cardiac 1.5-T MRI in patients with a conventional pacemaker or a conventional implantable cardioverter defibrillator. Eur Radiol 2018; 28:2406-2416. [PMID: 29318430 DOI: 10.1007/s00330-017-5098-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 09/07/2017] [Accepted: 09/25/2017] [Indexed: 01/25/2023]
Abstract
OBJECTIVES To investigate safety and diagnostic value of 1.5-T MRI in carriers of conventional pacemaker (cPM) or conventional implantable defibrillator (cICD). METHODS We prospectively compared cPM/cICD-carriers undergoing MRI (study group, SG), excluding those device-dependent or implanted <6 weeks before enrolment or prior to 01/01/2000, with cPM/cICD-carriers undergoing chest x-ray, CT or follow-up (reference group, RG). RESULTS 142 MRI (55 cardiac) were performed in 120 patients with cPM (n=71) or cICD (n=71). In the RG 98 measurements were performed in 95 patients with cPM (n=40) or cICD (n=58). No adverse events were observed. No MRI prolonged/interrupted. All cPM/cICD were correctly reprogrammed after MRI without malfunctions. One temporary communication failure was observed in one cPM-carrier. Immediately after MRI, 12/14 device interrogation parameters did not change significantly (clinically negligible changes of battery voltage and cICD charging time), without significant variations for SG versus RG. Three-12 months after MRI, 9/11 device interrogation parameters did not change significantly (clinically negligible changes of battery impedance/voltage). Non-significant changes of three markers of myocardial necrosis. Non-cardiac MRI: 82/87 diagnostic without artefacts; 4/87 diagnostic with artefacts; 1/87 partially diagnostic. Cardiac MRI: in cPM-carriers, 14/15 diagnostic with artefacts, 1/15 partially diagnostic; in cICD-carriers, 9/40 diagnostic with artefacts, 22 partially diagnostic, nine non-diagnostic. CONCLUSIONS A favourable risk-benefit ratio of 1.5-T MRI in cPM/cICD carriers was reported. KEY POINTS • Cooperation between radiologists and cardiac electrophysiologists allowed safe 1.5-T MRI in cPM/cICD-carriers. • No adverse events for 142 MRI in 71 cPM-carriers and 71 cICD-carriers. • Ninety-nine per cent (86/87) of non-cardiac MRI in cPM/cICD-carriers were diagnostic. • All cPM-carrier cardiac MRIs had artefacts, 14 examinations diagnostic, 1 partially diagnostic. • Twenty-three per cent (9/40) of cardiac MRI in cICD-carriers were non-diagnostic.
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Nazarian S, Hansford R, Rahsepar AA, Weltin V, McVeigh D, Gucuk Ipek E, Kwan A, Berger RD, Calkins H, Lardo AC, Kraut MA, Kamel IR, Zimmerman SL, Halperin HR. Safety of Magnetic Resonance Imaging in Patients with Cardiac Devices. N Engl J Med 2017; 377:2555-2564. [PMID: 29281579 PMCID: PMC5894885 DOI: 10.1056/nejmoa1604267] [Citation(s) in RCA: 212] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Patients who have pacemakers or defibrillators are often denied the opportunity to undergo magnetic resonance imaging (MRI) because of safety concerns, unless the devices meet certain criteria specified by the Food and Drug Administration (termed "MRI-conditional" devices). METHODS We performed a prospective, nonrandomized study to assess the safety of MRI at a magnetic field strength of 1.5 Tesla in 1509 patients who had a pacemaker (58%) or an implantable cardioverter-defibrillator (42%) that was not considered to be MRI-conditional (termed a "legacy" device). Overall, the patients underwent 2103 thoracic and nonthoracic MRI examinations that were deemed to be clinically necessary. The pacing mode was changed to asynchronous mode for pacing-dependent patients and to demand mode for other patients. Tachyarrhythmia functions were disabled. Outcome assessments included adverse events and changes in the variables that indicate lead and generator function and interaction with surrounding tissue (device parameters). RESULTS No long-term clinically significant adverse events were reported. In nine MRI examinations (0.4%; 95% confidence interval, 0.2 to 0.7), the patient's device reset to a backup mode. The reset was transient in eight of the nine examinations. In one case, a pacemaker with less than 1 month left of battery life reset to ventricular inhibited pacing and could not be reprogrammed; the device was subsequently replaced. The most common notable change in device parameters (>50% change from baseline) immediately after MRI was a decrease in P-wave amplitude, which occurred in 1% of the patients. At long-term follow-up (results of which were available for 63% of the patients), the most common notable changes from baseline were decreases in P-wave amplitude (in 4% of the patients), increases in atrial capture threshold (4%), increases in right ventricular capture threshold (4%), and increases in left ventricular capture threshold (3%). The observed changes in lead parameters were not clinically significant and did not require device revision or reprogramming. CONCLUSIONS We evaluated the safety of MRI, performed with the use of a prespecified safety protocol, in 1509 patients who had a legacy pacemaker or a legacy implantable cardioverter-defibrillator system. No long-term clinically significant adverse events were reported. (Funded by Johns Hopkins University and the National Institutes of Health; ClinicalTrials.gov number, NCT01130896 .).
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Affiliation(s)
- Saman Nazarian
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Rozann Hansford
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Amir A Rahsepar
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Valeria Weltin
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Diana McVeigh
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Esra Gucuk Ipek
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Alan Kwan
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Ronald D Berger
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Hugh Calkins
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Albert C Lardo
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Michael A Kraut
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Ihab R Kamel
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Stefan L Zimmerman
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
| | - Henry R Halperin
- From the Department of Medicine-Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.); and the Departments of Medicine-Cardiology (S.N., R.H., A.A.R., V.W., D.M., E.G.I., A.K., R.D.B., H.C., A.C.L., H.R.H.), Epidemiology (S.N.), Radiology (A.C.L., M.A.K., I.R.K., S.L.Z., H.R.H.), and Biomedical Engineering (R.D.B., A.C.L., H.R.H.), Johns Hopkins University, Baltimore
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Strom JB, Whelan JB, Shen C, Zheng SQ, Mortele KJ, Kramer DB. Safety and utility of magnetic resonance imaging in patients with cardiac implantable electronic devices. Heart Rhythm 2017; 14:1138-1144. [PMID: 28385671 PMCID: PMC5557369 DOI: 10.1016/j.hrthm.2017.03.039] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Indexed: 11/24/2022]
Abstract
BACKGROUND Off-label magnetic resonance imaging (MRI) for patients with cardiac implantable electrical devices has been limited owing to concerns about safety and unclear diagnostic and prognostic utility. OBJECTIVE The purpose of this study was to define major and minor adverse events with off-label MRI scans. METHODS We prospectively evaluated patients with non-MRI-conditional cardiac implantable electrical devices referred for MRI scans under a strict clinical protocol. The primary safety outcome was incidence of major adverse events (loss of pacing, inappropriate shock or antitachycardia pacing, need for system revision, or death) or minor adverse events (inappropriate pacing, arrhythmias, power-on-reset events, heating at the generator site, or changes in device parameters at baseline or at 6 months). RESULTS A total of 189 MRI scans were performed in 123 patients (63.1% [78] men; median age 70 ± 18.5 years; 56.9% [70] patients with implantable cardioverter-defibrillators; 33.3% [41] pacemaker-dependent patients) predominantly for brain or spinal conditions. A minority of scans (22.7% [43]) were performed for urgent or emergent indications. Major adverse events were rare: 1 patient with loss of pacing, no deaths, or system revisions (overall rate 0.5%; 95% confidence interval 0.01-2.91). Minor adverse events were similarly rare (overall rate 1.6%; 95% confidence interval 0.3-4.6). Nearly all studies (98.4% [186]) were interpretable, while 75.1% [142] were determined to change management according to the prespecified criteria. No clinically significant changes were observed in device parameters acutely after MRI or at 6 months as compared with baseline across all patient and device categories. CONCLUSION Off-label MRI scans performed under a strict protocol demonstrated excellent short- and medium-term safety while providing interpretable imaging that frequently influenced clinical care.
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Affiliation(s)
- Jordan B Strom
- Richard A. and Susan F. Smith Center for Cardiovascular Outcomes Research, Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts
| | - Jill B Whelan
- Harvard Medical School, Boston, Massachusetts; Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Changyu Shen
- Richard A. and Susan F. Smith Center for Cardiovascular Outcomes Research, Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts
| | | | - Koenraad J Mortele
- Department of Radiology, Divisions of Abdominal Imaging and Body MRI, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Daniel B Kramer
- Richard A. and Susan F. Smith Center for Cardiovascular Outcomes Research, Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts.
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15
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Samar H, Yamrozik JA, Williams RB, Doyle M, Shah M, Bonnet CA, Biederman RWW. Diagnostic Value of MRI in Patients With Implanted Pacemakers and Implantable Cardioverter-Defibrillators Across a Cross Population: Does the Benefit Justify the Risk? A Proof of Concept Study. JACC Clin Electrophysiol 2017; 3:991-1002. [PMID: 29759724 DOI: 10.1016/j.jacep.2017.03.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 03/07/2017] [Accepted: 03/13/2017] [Indexed: 10/19/2022]
Abstract
OBJECTIVES The objective of this study was to assess the diagnostic usefulness of thoracic and nonthoracic magnetic resonance imaging (MRI) imaging in patients with implantable cardiac devices (permanent pacemaker or implantable cardioverter-defibrillators [ICDs]) to determine if there was a substantial benefit to patients with regard to diagnosis and/or management. BACKGROUND MRI is infrequently performed on patients with conventional pacemakers or ICDs. Multiple studies have documented the safety of MRI scans in patients with implanted devices, yet the diagnostic value of this approach has not been established. METHODS Evaluation data were acquired in 136 patients with implanted cardiac devices who underwent MRIs during a 10-year period at a single institution. Specific criteria were followed for all patients to objectively define if the diagnosis by MRI enhanced patient care; 4 questions were answered after scan interpretation by both MRI technologists and MRI physicians who performed the scan. 1) Did the primary diagnosis change? 2) Did the MRI provide additional information to the existing diagnosis? 3) Was the pre-MRI (tentative) diagnosis confirmed? 4) Did patient management change? If "Yes" was answered to any of the preceding questions, the MRI scan was considered to be of value to patient diagnosis and/or therapy. RESULTS In 97% (n = 132) of patients, MR added value to patient diagnosis and management. In 49% (n = 67) of patients, MRI added additional valuable information to the primary diagnosis, and in 30% (n = 41) of patients, MRI changed the principle diagnosis and subsequent management of the patient. No safety issues were encountered, and no adverse effects of undergoing the MRI scan were noted in any patient. CONCLUSIONS MRI in patients with implanted pacemakers and defibrillators added value to patient diagnosis and management, which justified the risk of the procedure.
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Affiliation(s)
- Huma Samar
- Division of Cardiology, Centre for Cardiac MRI, Allegheny General Hospital, Pittsburgh, Pennsylvania; Loma Linda Veterans Affairs Hospital, Loma Linda, California
| | - June A Yamrozik
- Gerald McGinnis Cardiovascular Institute, Pittsburgh, Pennsylvania
| | | | - Mark Doyle
- Gerald McGinnis Cardiovascular Institute, Pittsburgh, Pennsylvania
| | - Moneal Shah
- Division of Cardiology, Centre for Cardiac MRI, Allegheny General Hospital, Pittsburgh, Pennsylvania; Gerald McGinnis Cardiovascular Institute, Pittsburgh, Pennsylvania
| | - Christopher A Bonnet
- Gerald McGinnis Cardiovascular Institute, Pittsburgh, Pennsylvania; Division of Electrophysiology, Gerald McGinnis Cardiovascular Institute, Pittsburgh, Pennsylvania
| | - Robert W W Biederman
- Division of Cardiology, Centre for Cardiac MRI, Allegheny General Hospital, Pittsburgh, Pennsylvania; Gerald McGinnis Cardiovascular Institute, Pittsburgh, Pennsylvania.
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SHAH ANANDD, PATEL ADARSHU, KNEZEVIC ANDREA, HOSKINS MICHAELH, HIRSH DAVIDS, MERCHANT FAISALM, EL CHAMI MIKHAELF, DELURGIO DAVIDB, PATEL ANSHULM, LEON ANGELR, LANGBERG JONATHANJ, LLOYD MICHAELS. Clinical Performance of Magnetic Resonance Imaging Conditional and Nonconditional Cardiac Implantable Electronic Devices. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2017; 40:467-475. [DOI: 10.1111/pace.13060] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 01/29/2017] [Accepted: 02/11/2017] [Indexed: 12/01/2022]
Affiliation(s)
- ANAND D. SHAH
- Division of Cardiology; Emory University School of Medicine; Atlanta Georgia
| | | | - ANDREA KNEZEVIC
- Rollins School of Public Health, Department of Biostatistics and Bioinformatics; Emory University; Atlanta Georgia
| | - MICHAEL H. HOSKINS
- Division of Cardiology; Emory University School of Medicine; Atlanta Georgia
| | - DAVID S. HIRSH
- Division of Cardiology; Emory University School of Medicine; Atlanta Georgia
| | - FAISAL M. MERCHANT
- Division of Cardiology; Emory University School of Medicine; Atlanta Georgia
| | - MIKHAEL F. EL CHAMI
- Division of Cardiology; Emory University School of Medicine; Atlanta Georgia
| | - DAVID B. DELURGIO
- Division of Cardiology; Emory University School of Medicine; Atlanta Georgia
| | - ANSHUL M. PATEL
- Division of Cardiology; Emory University School of Medicine; Atlanta Georgia
| | - ANGEL R. LEON
- Division of Cardiology; Emory University School of Medicine; Atlanta Georgia
| | | | - MICHAEL S. LLOYD
- Division of Cardiology; Emory University School of Medicine; Atlanta Georgia
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Clinical safety of the Iforia implantable cardioverter-defibrillator system in patients subjected to thoracic spine and cardiac 1.5-T magnetic resonance imaging scanning conditions. Heart Rhythm 2015; 12:2155-61. [DOI: 10.1016/j.hrthm.2015.06.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Indexed: 11/17/2022]
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Tang QY, Guo LD, Wang WX, Zhou W, Liu YN, Liu HY, Li L, Deng YB. Usefulness of contrast perfusion echocardiography for differential diagnosis of cardiac masses. ULTRASOUND IN MEDICINE & BIOLOGY 2015; 41:2382-2390. [PMID: 26087885 DOI: 10.1016/j.ultrasmedbio.2015.05.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 04/08/2015] [Accepted: 05/12/2015] [Indexed: 06/04/2023]
Abstract
The aim of this study was to assess the usefulness of contrast perfusion echocardiography in the differential diagnosis of different types of cardiac masses. Conventional echocardiography and contrast perfusion echocardiography were performed in 72 patients with cardiac masses. The degree of contrast enhancement of the mass and an adjacent section of myocardium after injection of contrast agent was determined by visual inspection and quantitative time-signal intensity curve analysis. The difference in maximal steady-state pixel intensity between the mass and the adjacent myocardium (ΔAmass-myocardium) was calculated. All masses had a pathologic diagnosis or resolved after anticoagulation. All 16 cardiac masses without enhancement on visual inspection were confirmed to be cardiac thrombi. Twenty-four masses with incomplete enhancement on visual inspection were recognized as benign tumors with validation methods. Of the 32 cardiac masses with complete enhancement, 30 were confirmed as malignant tumors and two as benign tumors with validation methods. The sensitivity and specificity of ΔAmass-myocardium in differentiating thrombi from tumors were 93% and 100%, respectively, and 100% and 97% in differentiating malignant tumors from benign tumors and thrombi. Both visual and quantitative assessment of degree of enhancement of cardiac masses in relation to the adjacent myocardium during contrast perfusion echocardiography had high diagnostic accuracy for differentiation of a thrombus from a tumor or a benign tumor from a malignant tumor.
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Affiliation(s)
- Qiao-Ying Tang
- Department of Medical Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ling-Dan Guo
- Department of Medical Ultrasound, Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wen-Xuan Wang
- Department of Medical Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Zhou
- Department of Medical Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ya-Ni Liu
- Department of Medical Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hong-Yun Liu
- Department of Medical Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Li Li
- Department of Medical Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - You-Bin Deng
- Department of Medical Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Necessity of magnetic resonance imaging examinations after permanent pacemaker implantation. Int J Cardiol 2015; 184:497-498. [DOI: 10.1016/j.ijcard.2015.02.080] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 02/21/2015] [Indexed: 11/23/2022]
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Canadian Heart Rhythm Society and Canadian Association of Radiologists Consensus Statement on Magnetic Resonance Imaging with Cardiac Implantable Electronic Devices. Can Assoc Radiol J 2014; 65:290-300. [DOI: 10.1016/j.carj.2014.08.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Magnetic resonance imaging (MRI) has historically been considered contraindicated for individuals with cardiac implantable electronic devices (CIEDs) such as pacemakers and implantable defibrillators. Magnetic resonance scanners produce magnetic fields that can interact negatively with the metallic components of CIEDs. However, as CIED technology has advanced, newer MRI conditional devices have been developed that are now in clinical use and these systems have had demonstrated safety in the MRI environment. Despite the supportive data of such CIED systems, physicians remain reluctant to perform MRI scanning of conditional devices. This joint statement by the Canadian Heart Rhythm Society and the Canadian Association of Radiologists describes a collaborative process by which CIED specialists and clinics can work with radiology departments and specialists to safely perform MRI in patients with MRI conditional CIED systems. The steps required for patient and scanning preparation and the roles and responsibilities of the CIED and radiology departments are outlined. We also briefly outline the risks and a process by which patients with nonconditional CIEDs might also receive MRI in highly specialized centres. This document supports MRI in patients with MRI conditional CIEDs and offers recommendations on how this can be implemented safely and effectively.
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Verma A, Ha AC, Dennie C, Essebag V, Exner DV, Khan N, Lane C, Leipsic J, Philippon F, Sampaio M, Schieda N, Seifer C, Berthiaume A, Campbell D, Chakraborty S. Canadian Heart Rhythm Society and Canadian Association of Radiologists Consensus Statement on Magnetic Resonance Imaging With Cardiac Implantable Electronic Devices. Can J Cardiol 2014; 30:1131-41. [DOI: 10.1016/j.cjca.2014.07.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 07/10/2014] [Indexed: 11/30/2022] Open
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Eitel C, Hindricks G, Grothoff M, Gutberlet M, Sommer P. Catheter Ablation Guided by Real-Time MRI. Curr Cardiol Rep 2014; 16:511. [DOI: 10.1007/s11886-014-0511-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Safety of Computed Tomography in Patients With Cardiac Rhythm Management Devices. J Am Coll Cardiol 2014; 63:1769-75. [DOI: 10.1016/j.jacc.2013.12.040] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 12/04/2013] [Accepted: 12/23/2013] [Indexed: 11/19/2022]
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MESUBI OLUROTIMI, AHMAD GHADA, JEUDY JEAN, JIMENEZ ALEJANDRO, KUK RICHARD, SALIARIS ANASTASIOS, SEE VINCENT, SHOROFSKY STEPHEN, DICKFELD TIMM. Impact of ICD Artifact Burden on Late Gadolinium Enhancement Cardiac MR Imaging in Patients Undergoing Ventricular Tachycardia Ablation. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2014; 37:1274-83. [DOI: 10.1111/pace.12405] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 02/16/2014] [Accepted: 03/18/2014] [Indexed: 01/28/2023]
Affiliation(s)
- OLUROTIMI MESUBI
- Maryland Arrhythmia and Cardiology Imaging Group (MACIG); University of Maryland; Baltimore Maryland
- Division of Cardiology; University of Maryland; Baltimore Maryland
- Division of Cardiovascular Medicine; University of Iowa; Iowa City Iowa
| | - GHADA AHMAD
- Maryland Arrhythmia and Cardiology Imaging Group (MACIG); University of Maryland; Baltimore Maryland
- Division of Cardiology; University of Maryland; Baltimore Maryland
| | - JEAN JEUDY
- Maryland Arrhythmia and Cardiology Imaging Group (MACIG); University of Maryland; Baltimore Maryland
- Division of Radiology; University of Maryland; Baltimore Maryland
| | - ALEJANDRO JIMENEZ
- Maryland Arrhythmia and Cardiology Imaging Group (MACIG); University of Maryland; Baltimore Maryland
- Division of Cardiology; University of Maryland; Baltimore Maryland
| | - RICHARD KUK
- Maryland Arrhythmia and Cardiology Imaging Group (MACIG); University of Maryland; Baltimore Maryland
- Division of Cardiology; University of Maryland; Baltimore Maryland
| | - ANASTASIOS SALIARIS
- Maryland Arrhythmia and Cardiology Imaging Group (MACIG); University of Maryland; Baltimore Maryland
- Division of Cardiology; University of Maryland; Baltimore Maryland
| | - VINCENT SEE
- Maryland Arrhythmia and Cardiology Imaging Group (MACIG); University of Maryland; Baltimore Maryland
- Division of Cardiology; University of Maryland; Baltimore Maryland
| | - STEPHEN SHOROFSKY
- Maryland Arrhythmia and Cardiology Imaging Group (MACIG); University of Maryland; Baltimore Maryland
- Division of Cardiology; University of Maryland; Baltimore Maryland
| | - TIMM DICKFELD
- Maryland Arrhythmia and Cardiology Imaging Group (MACIG); University of Maryland; Baltimore Maryland
- Division of Cardiology; University of Maryland; Baltimore Maryland
- Division of Radiology; University of Maryland; Baltimore Maryland
- Baltimore VA Medical Center; Baltimore Maryland
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Cronin EM, Mahon N, Wilkoff BL. MRI in patients with cardiac implantable electronic devices. Expert Rev Med Devices 2014; 9:139-46. [DOI: 10.1586/erd.11.73] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Rod Gimbel J, Bello D, Schmitt M, Merkely B, Schwitter J, Hayes DL, Sommer T, Schloss EJ, Chang Y, Willey S, Kanal E. Randomized trial of pacemaker and lead system for safe scanning at 1.5 Tesla. Heart Rhythm 2013; 10:685-91. [DOI: 10.1016/j.hrthm.2013.01.022] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Indexed: 10/27/2022]
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27
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Suzuki H, Sumiyoshi A, Kawashima R, Shimokawa H. Different brain activation under left and right ventricular stimulation: an fMRI study in anesthetized rats. PLoS One 2013; 8:e56990. [PMID: 23451129 PMCID: PMC3579932 DOI: 10.1371/journal.pone.0056990] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Accepted: 01/16/2013] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Myocardial ischemia in the anterior wall of the left ventricule (LV) and in the inferior wall and/or right ventricle (RV) shows different manifestations that can be explained by the different innervations of cardiac afferent nerves. However, it remains unclear whether information from different areas of the heart, such as the LV and RV, are differently processed in the brain. In this study, we investigated the brain regions that process information from the LV or RV using cardiac electrical stimulation and functional magnetic resonance imaging (fMRI) in anesthetized rats because the combination of these two approaches cannot be used in humans. METHODOLOGY/PRINCIPAL FINDINGS An electrical stimulation catheter was inserted into the LV or RV (n = 12 each). Brain fMRI scans were recorded during LV or RV stimulation (9 Hz and 0.3 ms width) over 10 blocks consisting of alternating periods of 2 mA for 30 sec followed by 0.2 mA for 60 sec. The validity of fMRI signals was confirmed by first and second-level analyses and temporal profiles. Increases in fMRI signals were observed in the anterior cingulate cortex and the right somatosensory cortex under LV stimulation. In contrast, RV stimulation activated the right somatosensory cortex, which was identified more anteriorly compared with LV stimulation but did not activate the anterior cingulate cortex. CONCLUSION/SIGNIFICANCE This study provides the first evidence for differences in brain activation under LV and RV stimulation. These different brain processes may be associated with different clinical manifestations between anterior wall and inferoposterior wall and/or RV myocardial ischemia.
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Affiliation(s)
- Hideaki Suzuki
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan.
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28
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Kanal E, Barkovich AJ, Bell C, Borgstede JP, Bradley WG, Froelich JW, Gimbel JR, Gosbee JW, Kuhni-Kaminski E, Larson PA, Lester JW, Nyenhuis J, Schaefer DJ, Sebek EA, Weinreb J, Wilkoff BL, Woods TO, Lucey L, Hernandez D. ACR guidance document on MR safe practices: 2013. J Magn Reson Imaging 2013; 37:501-30. [PMID: 23345200 DOI: 10.1002/jmri.24011] [Citation(s) in RCA: 441] [Impact Index Per Article: 40.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Accepted: 12/04/2012] [Indexed: 12/13/2022] Open
Abstract
Because there are many potential risks in the MR environment and reports of adverse incidents involving patients, equipment and personnel, the need for a guidance document on MR safe practices emerged. Initially published in 2002, the ACR MR Safe Practices Guidelines established de facto industry standards for safe and responsible practices in clinical and research MR environments. As the MR industry changes the document is reviewed, modified and updated. The most recent version will reflect these changes.
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Affiliation(s)
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- Department of Radiology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania 15213, USA.
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29
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Takeuchi D, Tomizawa Y. Pacing device therapy in infants and children: a review. J Artif Organs 2012; 16:23-33. [PMID: 23104398 DOI: 10.1007/s10047-012-0668-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 10/10/2012] [Indexed: 01/20/2023]
Abstract
The number of pediatric pacemakers implanted is still relatively small. Children requiring pacing therapy have characteristics that are distinct from those of adults, including physical size, somatic growth, and cardiac anomalies. Considering these features, long-term follow-up of pediatric pacemaker implantation is necessary. Selection of appropriate generators, pacing modes, pacing sites, and leads is important. Generally, epicardial leads are commonly used in small infants. On the other hand, the use of endocardial leads in children is increasing worldwide because of their benefits over epicardial leads, such as minimal invasiveness, lower pacing threshold, and longer generator longevity. Endocardial leads are not suitable for patients with intracardiac shunts because of the high risk of systemic thrombosis. Venous occlusion is another significant problem with endocardial leads. With the increase in the number of pacing device implantations, the incidence of infection from such devices is also increasing. Complete device removal is sometimes recommended to treat device infection, but experience in the removal of endocardial leads in children is still scarce. This article gives an overview of pacing therapy in the pediatric population, including discussions on new pacing systems, such as remote monitoring systems, magnetic imaging compliant pacemaker systems, and leadless pacing devices.
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Affiliation(s)
- Daiji Takeuchi
- Department of Pediatric Cardiology, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan.
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30
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Cronin EM, Wilkoff BL. Magnetic resonance imaging conditional pacemakers: rationale, development and future directions. Indian Pacing Electrophysiol J 2012; 12:204-12. [PMID: 23071382 PMCID: PMC3443878 DOI: 10.1016/s0972-6292(16)30543-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Pacemakers and other cardiac implantable electronic devices (CIEDs) have long been considered an absolute contraindication to magnetic resonance imaging (MRI), a crucial and growing imaging modality. In the last 20 years, protocols have been developed to allow MR scanning of CIED patients with a low complication rate. However, this practice has remained limited to a relatively small number of centers, and many pacemaker patients continue to be denied access to clinically indicated imaging. The introduction of MRI conditional pacemakers has provided a widely applicable and satisfactory solution to this problem. Here, the interactions of pacemakers with the MR environment, the results of MR scanning in patients with conventional CIEDs, the development and clinical experience with MRI conditional devices, and future directions are reviewed.
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31
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Dorenkamp M, Roser M, Hamm B, Haverkamp W. [Magnetic resonance imaging and implantable cardiac devices. Current status and future perspectives of MR-compatible systems]. Herz 2012; 37:136-45. [PMID: 22398815 DOI: 10.1007/s00059-012-3588-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Conventional pacemakers and implantable cardioverter-defibrillators (ICD) have always been regarded as a contraindication to magnetic resonance imaging (MRI). MR-compatible systems represent a recent and particularly important innovation, since they will provide device patients with significantly improved access to MR examinations. However, the safe application of MR-compatible technology requires a detailed understanding of the strictly defined cardiologic and radiologic requirements and conditions that are to be adhered to before and during an MR examination. The present article gives an overview of problematic MR interactions with implanted devices, illustrates the most important aspects of MR-compatible pacemaker and ICD systems, analyzes their current clinical status, and offers a critical perspective.
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Affiliation(s)
- M Dorenkamp
- Medizinische Klinik mit Schwerpunkt Kardiologie, Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Augustenburger Platz 1, Berlin, Germany
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32
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Bilchick KC. Integration of CMR scar imaging and electroanatomic mapping: the future of VT ablation? JACC Cardiovasc Imaging 2012; 5:211-3. [PMID: 22340830 DOI: 10.1016/j.jcmg.2011.09.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Accepted: 09/20/2011] [Indexed: 11/20/2022]
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33
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Tian J, Smith MF, Ahmad G, Dilsizian V, Jimenez A, Dickfeld T. Integration of 3-Dimensional Scar Models from SPECT to Guide Ventricular Tachycardia Ablation. J Nucl Med 2012; 53:894-901. [DOI: 10.2967/jnumed.111.094904] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Hsu C, Parker G, Puranik R. Implantable devices and magnetic resonance imaging. Heart Lung Circ 2012; 21:358-63. [PMID: 22542861 DOI: 10.1016/j.hlc.2012.04.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 04/02/2012] [Accepted: 04/02/2012] [Indexed: 11/25/2022]
Abstract
The indications for cardiovascular implantable electronic devices (CIEDs) are ever expanding, seemingly in parallel to the similar widespread increase in the use of magnetic resonance imaging (MRI), where there are clear advantages of imaging with no ionizing radiation and superior tissue contrast. However, CIEDs have traditionally been considered an absolute contraindication to MRI, posing a major limitation to investigating various pathologies after implantation of such devices. In the last decade the traditional paradigm of avoiding MRI in patients with CIEDs has been challenged with studies demonstrating relative safety at 1.5T under certain circumstances. Now with the recent approval of 'MR conditional' devices, it is becoming increasingly apparent that CIEDs should no longer be considered an absolute contraindication to MRI.
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Affiliation(s)
- Chijen Hsu
- Department of Cardiology, Royal Prince Alfred Hospital, Sydney, Australia
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35
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Arenal A, Hernandez J, Perez-David E, Rubio-Guivernau JL, Ledesma-Carbayo MJ, Fernandez-Aviles F. Do the spatial characteristics of myocardial scar tissue determine the risk of ventricular arrhythmias? Cardiovasc Res 2012; 94:324-32. [DOI: 10.1093/cvr/cvs113] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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36
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Bovenschulte H, Schlüter-Brust K, Liebig T, Erdmann E, Eysel P, Zobel C. MRI in patients with pacemakers: overview and procedural management. DEUTSCHES ARZTEBLATT INTERNATIONAL 2012; 109:270-5. [PMID: 22567062 DOI: 10.3238/arztebl.2012.0270] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Accepted: 01/02/2012] [Indexed: 11/27/2022]
Abstract
BACKGROUND Magnetic resonance imaging (MRI) is generally contraindicated for patients with a pacemaker (PM) or implantable cardiac defibrillator (ICD), because of the risk of life-threatening interference with the device. Nevertheless, the question whether to perform MRI despite the presence of these devices can still arise when MRI is vitally indicated. In some hospitals, special precautionary measures are taken so that MRI can be performed in such cases. METHODS This review is based on the authors' experience in 42 patients who underwent MRI at our university hospital, on the pertinent literature, and on the recommendations of medical societies. RESULTS Because of its excellent image quality, MRI is often an indispensable diagnostic tool. Structured multidisciplinary management enables it to be performed safely even in patients with a PM or ICD. Pre- and post-MRI checks of the device are recommended, as well as extensive monitoring and the availability of the necessary personnel to deal with an emergency. In general, the pacing and defibrillator functions should be deactivated; for pacemaker-dependent patients, the asynchronous pacing mode should be activated. No serious incidents have occurred when these precautions have been observed, either among our own patients or in the literature. Newer PM systems have been approved for MRI scanning under certain conditions. CONCLUSION In patients with a PM or ICD, the benefit of MRI may far outweigh its risks if the indication has been established for the particular patient as an interdisciplinary decision and if the appropriate precautions are observed during scanning. Now that newer PM systems have been approved for MRI scanning, the problem seems close to being solved.
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37
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Jung W, Zvereva V, Hajredini B, Jackle S. Safe magnetic resonance image scanning of the pacemaker patient: current technologies and future directions. Europace 2012; 14:631-7. [DOI: 10.1093/europace/eur391] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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38
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Manaouil C, Fantoni S, Montpellier D, Tordjman E, Jarde O. [Practical questions around individual with a pacemaker or an implantable cardioverter defibrillator]. Presse Med 2011; 41:736-44. [PMID: 22138293 DOI: 10.1016/j.lpm.2011.09.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 09/02/2011] [Accepted: 09/18/2011] [Indexed: 01/02/2023] Open
Abstract
An individual with a pacemaker can ask his GP for information about potential problems associated with the device. Should a pacemaker continue to be used by end-of-life patients? Should a pacemaker be stopped in a limited care situation? What precautions should be taken when treating a patient with a pacemaker? Pacemakers and implantable defibrillators are sensitive to electromagnetic interference (EMI). Medically, MRIs are theoretically contraindicated, even though examinations could be performed without a major problem, and special precautions should be taken when using an electrosurgical cutter or radiotherapy. In case of death, a doctor or embalmer must remove the patient's pacemaker due to its risk of explosion during cremation. Doctors who sign cremation forms have a legal obligation to provide such information. It may affect an employee's ability to work. Are there some professions that are not well suited for individuals with a pacemaker?
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Affiliation(s)
- Cécile Manaouil
- CHU d'Amiens-Picardie, service de médecine légale et sociale, Amiens cedex 1, France.
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Shinbane JS, Colletti PM, Shellock FG. Magnetic resonance imaging in patients with cardiac pacemakers: era of "MR Conditional" designs. J Cardiovasc Magn Reson 2011; 13:63. [PMID: 22032338 PMCID: PMC3219582 DOI: 10.1186/1532-429x-13-63] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Accepted: 10/27/2011] [Indexed: 11/24/2022] Open
Abstract
Advances in cardiac device technology have led to the first generation of magnetic resonance imaging (MRI) conditional devices, providing more diagnostic imaging options for patients with these devices, but also new controversies. Prior studies of pacemakers in patients undergoing MRI procedures have provided groundwork for design improvements. Factors related to magnetic field interactions and transfer of electromagnetic energy led to specific design changes. Ferromagnetic content was minimized. Reed switches were modified. Leads were redesigned to reduce induced currents/heating. Circuitry filters and shielding were implemented to impede or limit the transfer of certain unwanted electromagnetic effects. Prospective multicenter clinical trials to assess the safety and efficacy of the first generation of MR conditional cardiac pacemakers demonstrated no significant alterations in pacing parameters compared to controls. There were no reported complications through the one month visit including no arrhythmias, electrical reset, inhibition of generator output, or adverse sensations. The safe implementation of these new technologies requires an understanding of the well-defined patient and MR system conditions. Although scanning a patient with an MR conditional device following the strictly defined patient and MR system conditions appears straightforward, issues related to patients with pre-existing devices remain complex. Until MR conditional devices are the routine platform for all of these devices, there will still be challenging decisions regarding imaging patients with pre-existing devices where MRI is required to diagnose and manage a potentially life threatening or serious scenario. A range of other devices including ICDs, biventricular devices, and implantable physiologic monitors as well as guidance of medical procedures using MRI technology will require further biomedical device design changes and testing. The development and implementation of cardiac MR conditional devices will continue to require the expertise and collaboration of multiple disciplines and will need to prove safety, effectiveness, and cost effectiveness in patient care.
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Affiliation(s)
- Jerold S Shinbane
- Division of Cardiovascular Medicine/Cardiovascular and Thoracic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Patrick M Colletti
- Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA90033, USA
| | - Frank G Shellock
- Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA90033, USA
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Nazarian S, Hansford R, Roguin A, Goldsher D, Zviman MM, Lardo AC, Caffo BS, Frick KD, Kraut MA, Kamel IR, Calkins H, Berger RD, Bluemke DA, Halperin HR. A prospective evaluation of a protocol for magnetic resonance imaging of patients with implanted cardiac devices. Ann Intern Med 2011; 155:415-24. [PMID: 21969340 PMCID: PMC4337840 DOI: 10.7326/0003-4819-155-7-201110040-00004] [Citation(s) in RCA: 226] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Magnetic resonance imaging (MRI) is avoided in most patients with implanted cardiac devices because of safety concerns. OBJECTIVE To define the safety of a protocol for MRI at the commonly used magnetic strength of 1.5 T in patients with implanted cardiac devices. DESIGN Prospective nonrandomized trial. (ClinicalTrials.gov registration number: NCT01130896) SETTING: One center in the United States (94% of examinations) and one in Israel. PATIENTS 438 patients with devices (54% with pacemakers and 46% with defibrillators) who underwent 555 MRI studies. INTERVENTION Pacing mode was changed to asynchronous for pacemaker-dependent patients and to demand for others. Tachyarrhythmia functions were disabled. Blood pressure, electrocardiography, oximetry, and symptoms were monitored by a nurse with experience in cardiac life support and device programming who had immediate backup from an electrophysiologist. MEASUREMENTS Activation or inhibition of pacing, symptoms, and device variables. RESULTS In 3 patients (0.7% [95% CI, 0% to 1.5%]), the device reverted to a transient back-up programming mode without long-term effects. Right ventricular (RV) sensing (median change, 0 mV [interquartile range {IQR}, -0.7 to 0 V]) and atrial and right and left ventricular lead impedances (median change, -2 Ω [IQR, -13 to 0 Ω], -4 Ω [IQR, -16 to 0 Ω], and -11 Ω [IQR, -40 to 0 Ω], respectively) were reduced immediately after MRI. At long-term follow-up (61% of patients), decreased RV sensing (median, 0 mV, [IQR, -1.1 to 0.3 mV]), decreased RV lead impedance (median, -3 Ω, [IQR, -29 to 15 Ω]), increased RV capture threshold (median, 0 V, IQR, [0 to 0.2 Ω]), and decreased battery voltage (median, -0.01 V, IQR, -0.04 to 0 V) were noted. The observed changes did not require device revision or reprogramming. LIMITATIONS Not all available cardiac devices have been tested. Long-term in-person or telephone follow-up was unavailable in 43 patients (10%), and some data were missing. Those with missing long-term capture threshold data had higher baseline right atrial and right ventricular capture thresholds and were more likely to have undergone thoracic imaging. Defibrillation threshold testing and random assignment to a control group were not performed. CONCLUSION With appropriate precautions, MRI can be done safely in patients with selected cardiac devices. Because changes in device variables and programming may occur, electrophysiologic monitoring during MRI is essential.
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Affiliation(s)
- Saman Nazarian
- Johns Hopkins University, Baltimore, Maryland 21287, USA.
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41
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Clinical Application of FDG-PET Imaging for Three-Dimensional Myocardial Scar and Left Ventricular Anatomy During Ventricular Tachycardia Ablation. PET Clin 2011; 6:393-402. [DOI: 10.1016/j.cpet.2011.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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42
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Safety of magnetic resonance imaging in patients with permanent pacemakers: a collaborative clinical approach. J Interv Card Electrophysiol 2011; 33:59-67. [DOI: 10.1007/s10840-011-9615-8] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2011] [Accepted: 08/11/2011] [Indexed: 11/25/2022]
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43
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Everitt MD, Verma A, Saarel EV. The wearable external cardiac defibrillator for cancer patients at risk for sudden cardiac death. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/s1548-5315(12)70086-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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44
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Junttila MJ, Fishman JE, Lopera GA, Pattany PM, Velazquez DL, Williams AR, Trachtenberg BH, Sanina C, Mather J, Hare JM. Safety of serial MRI in patients with implantable cardioverter defibrillators. Heart 2011; 97:1852-6. [PMID: 21873440 DOI: 10.1136/heartjnl-2011-300153] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE While patients with cardiac implantable electronic devices could benefit from magnetic resonance (MR) imaging, the presence of such devices has been designated as an absolute contraindication to MR. Although scanning algorithms are proposed for cardiac implantable electronic devices, their safety remains uncertain. To address this issue, the safety of serial cardiac MR scans was evaluated in patients with implantable cardioverter defibrillators (ICDs). METHODS Three serial cardiac MR scans were prospectively performed at 1.5 T on 10 patients (9 men) of median age 56 years (range 51-68) with ICDs. ICD interrogation was performed before and after the MR scan and at a follow-up of median 370 days (range 274-723). Image quality was also assessed. RESULTS In all patients MR scanning occurred without complications. There were no differences between pre- and post-MR pacing capture threshold, pacing lead or high voltage lead impedance, or battery voltage values. During follow-up there were no occurrences of ICD dysfunction. Although most patients had image artifacts, the studies were generally diagnostic regarding left ventricular function and wall motion. Delayed enhancement imaging was of good quality for inferior wall and inferolateral infarcts, but ICD artifacts often affected the imaging of anterior wall infarcts. CONCLUSION Serial MR scans at 1.5 T in patients with ICDs, when carefully performed in a monitored setting, have no adverse effects on either patient or device. When required, single or multiple MR scans at 1.5 T may therefore be considered for clinical diagnostic purposes in these patients.
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Affiliation(s)
- M Juhani Junttila
- Division of Cardiology, Miller School of Medicine, University of Miami, Florida, USA
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45
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Baikoussis NG, Apostolakis E, Papakonstantinou NA, Sarantitis I, Dougenis D. Safety of Magnetic Resonance Imaging in Patients With Implanted Cardiac Prostheses and Metallic Cardiovascular Electronic Devices. Ann Thorac Surg 2011; 91:2006-11. [DOI: 10.1016/j.athoracsur.2011.02.068] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2010] [Revised: 02/19/2011] [Accepted: 02/23/2011] [Indexed: 12/16/2022]
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46
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MRI of patients with cardiac pacemakers: a review of the medical literature. AJR Am J Roentgenol 2011; 196:390-401. [PMID: 21257892 DOI: 10.2214/ajr.10.4239] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Numerous studies testing the use of pacemakers with MRI have been published. Our aim was to analyze these trials to determine the safety of MRI for patients with cardiac pacemakers. We performed a systematic search of peer-reviewed databases. A total of 31 articles were reviewed. CONCLUSION The data are heterogeneous with regard to MRI being considered for patients with pacemakers, and the benefits of the imaging should outweigh the risks.
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47
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Dickfeld T, Tian J, Ahmad G, Jimenez A, Turgeman A, Kuk R, Peters M, Saliaris A, Saba M, Shorofsky S, Jeudy J. MRI-Guided ventricular tachycardia ablation: integration of late gadolinium-enhanced 3D scar in patients with implantable cardioverter-defibrillators. Circ Arrhythm Electrophysiol 2011; 4:172-84. [PMID: 21270103 DOI: 10.1161/circep.110.958744] [Citation(s) in RCA: 141] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Substrate-guided ablation of ventricular tachycardia (VT) in patients with implanted cardioverter-defibrillators (ICDs) relies on voltage mapping to define the scar and border zone. An integrated 3D scar reconstruction from late gadolinium enhancement (LGE) MRI could facilitate VT ablations. METHODS AND RESULTS Twenty-two patients with ICD underwent contrast-enhanced cardiac MRI with a specific absorption rate of <2.0 W/kg before VT ablation. Device interrogation demonstrated unchanged ICD parameters immediately before, after, or at 68±21 days follow-up (P>0.05). ICD imaging artifacts were most prominent in the anterior wall and allowed full and partial assessment of LGE in 9±4 and 12±3 of 17 segments, respectively. In 14 patients with LGE, a 3D scar model was reconstructed and successfully registered with the clinical mapping system (accuracy, 3.9±1.8 mm). Using receiver operating characteristic curves, bipolar and unipolar voltages of 1.49 and 4.46 mV correlated best with endocardial MRI scar. Scar visualization allowed the elimination of falsely low voltage recordings (suboptimal catheter contact) in 4.1±1.9% of <1.5-mV mapping points. Display of scar border zone allowed identification of excellent pace mapping sites, with only limited voltage mapping in 64% of patients. Viable endocardium of >2 mm resulted in >1.5-mV voltage recordings despite up to 63% transmural midmyocardial scar successfully ablated with MRI guidance. All successful ablation sites demonstrated LGE (transmurality, 68±26%) and were located within 10 mm of transition zones to 0% to 25% scar in 71%. CONCLUSIONS Contrast-enhanced cardiac MRI can be safely performed in selected patients with ICDs and allows the integration of detailed 3D scar maps into clinical mapping systems, providing supplementary anatomic guidance to facilitate substrate-guided VT ablations.
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Affiliation(s)
- Timm Dickfeld
- Division of Cardiology, University of Maryland, Baltimore, 21201, USA.
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Bottomley PA, Kumar A, Edelstein WA, Allen JM, Karmarkar PV. Designing passive MRI-safe implantable conducting leads with electrodes. Med Phys 2010; 37:3828-43. [PMID: 20831091 DOI: 10.1118/1.3439590] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE The presence of implanted electronic devices with conducting leads and electrodes are contraindicated for magnetic resonance imaging (MRI), denying many patients its potential benefits. The prime concern is MRI's radio frequency (RF) fields, which can cause elevated local specific absorption rates (SARs) and potential heat injury. The purpose of this article is to develop and compare a range of passive implantable "MRI-safe" lead designs. METHODS Conducting leads incorporating different lengths (3-75 cm), insulation thicknesses (0-105 microm), resistances (100-3000 omega), coiled conductors (inner diameter < or = 1.2 mm), high-impedance (135-2700 omega) RF traps, and single-coiled and triple-coiled coaxial-wound "billabong" leads with reversed coil sections that oppose and reduce the induced current, are investigated both experimentally using local temperature measurements, and by numerical full-wave electromagnetic field analysis of the local SAR, in three different-sized bioanalogous model saline-gel phantoms at 1.5 T MRI and 4 W/kg exposure. RESULTS In all designs, the maximum computed 1 g average SAR and experimental temperature rise occur at the bare electrodes. Electrode heating increases with lead insulation thickness and peaks for uncoiled leads 25-50 cm long. A reasonable match between computed SAR and the point SAR estimated from thermal sensors obtained by approximating the computation volume to that of the thermal probes. Factors that maximize the impedance of leads with resistive, coiled, RF trap and billabong elements can effectively limit heating below 1-2 degrees, but folded lead configurations can be a concern. The RF trap and billabong designs can both support multiple conductors and electrodes, with billabong prototype leads also heating <1 degrees C when tested for 3 T MRI. CONCLUSIONS Lead insulation and length strongly affect implanted lead safety to RF exposure during MRI. Lead designs employing impedance and reversed winding sections offer hope for the development of passive, MRI-safe, implantable conducting leads for future human use.
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Affiliation(s)
- Paul A Bottomley
- SurgiVision, Inc., Suite B307, 1101 East 33rd Street, Baltimore, Maryland 21218, USA.
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Hasan R, Clifford SM, Ghanbari H, Schmidt M, Segerson NM, Daccarett M. Imaging modalities in cardiac electrophysiology. Future Cardiol 2009; 6:113-27. [PMID: 20014991 DOI: 10.2217/fca.09.58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cardiac imaging, both noninvasive and invasive, has become a crucial part of evaluating patients during the electrophysiology procedure experience. These anatomical data allow electrophysiologists to not only assess who is an appropriate candidate for each procedure, but also to determine the rate of success from these procedures. This article incorporates a review of the various cardiac imaging techniques available today, with a focus on atrial arrhythmias, ventricular arrhythmias and device therapy.
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Affiliation(s)
- Reema Hasan
- Division of Cardiac Electrophysiology, Providence Hospital & Medical Center, Wayne State University, Southfield, MI, USA.
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