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Steckner MC, Grainger D, Charles-Edwards G. Transitioning from 0.5 to 0.9 mT: Protecting against inadvertent activation of magnet mode in active implants. Magn Reson Med 2024; 92:2237-2245. [PMID: 38968006 DOI: 10.1002/mrm.30153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 04/12/2024] [Accepted: 04/23/2024] [Indexed: 07/07/2024]
Abstract
The "5 gauss line" is a phrase that is likely to be familiar to everyone working with MRI, but what is its significance, how was it defined, and what changes are currently in progress? This review explores the history of 5 gauss (0.5 mT) as a threshold for protecting against inadvertently putting cardiac pacemakers, implantable cardioverter defibrillators, and other active implantable medical devices into a "magnet mode." Additionally, it describes the background to the recent change of this threshold to 9 gauss (0.9 mT) in the International Standard IEC 60601-2-33 edition 4.0 that defines basic safety requirements for MRI. Practical implications of this change and some ongoing and emerging issues are also discussed.
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Affiliation(s)
- Michael C Steckner
- MKS Consulting, Ohio, Beachwood, USA
- IEC SC62B/MT40 IEC 60601-2-33, Geneva, Switzerland
- ISO/TC 150/SC 6/JWG 2 (IEC/SC62B), Geneva, Switzerland
| | - David Grainger
- IEC SC62B/MT40 IEC 60601-2-33, Geneva, Switzerland
- Medicines and Healthcare Products Regulatory Agency, London, UK
| | - Geoff Charles-Edwards
- IEC SC62B/MT40 IEC 60601-2-33, Geneva, Switzerland
- Guy's and St Thomas' NHS Foundation Trust, London, UK
- King's College London, London, UK
- Royal Marsden NHS Foundation Trust, London, UK
- Institute of Cancer Research, London, UK
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Kewcharoen J, Shah K, Bhardwaj R, Contractor T, Turagam MK, Mandapati R, Lakkireddy D, Garg J. New-generation electronic appliances and cardiac implantable electronic devices: a systematic literature review of mechanisms and in vivo studies. J Interv Card Electrophysiol 2024:10.1007/s10840-024-01777-z. [PMID: 38443707 DOI: 10.1007/s10840-024-01777-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 02/27/2024] [Indexed: 03/07/2024]
Abstract
INTRODUCTION Cardiac implantable electronic device (CIED) functions are susceptible to electromagnetic interference (EMI) from electromagnetic fields (EMF). Data on EMI risks from new-generation electronic appliances (EA) are limited. OBJECTIVE We performed a systematic literature review on the mechanisms of EMI, current evidence, and recently published trials evaluating the effect of EMF on CIEDs from electric vehicles (EV), smartphone, and smartwatch technology and summarize its safety data. METHODS Electronic databases, including PubMed and EMBASE, were searched for in vivo studies evaluating EMF strength and incidence between CIEDs and commercial EVs, new-generation smartphones, and new-generation smartwatches. RESULTS A total of ten studies (three on EVs, five on smartphones, one on smartphones, one on smartphones and smartwatches) were included in our systematic review. There was no report of EMI incidence associated with EVs or smartwatches. Magnet-containing smartphones (iPhone 12) can cause EMI when placed directly over CIEDs - thereby triggering the magnet mode; otherwise, no report of EMI was observed with other positions or smartphone models. CONCLUSION Current evidence suggests CIED recipients are safe from general interaction with EVs/HEVs, smartphones, and smartwatches. Strictly, results may only be applied to commercial brands or models tested in the published studies. There is limited data on EMI risk from EVs wireless charging and smartphones with MagSafe technology.
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Affiliation(s)
- Jakrin Kewcharoen
- Division of Cardiology, Cardiac Arrhythmia Service, Loma Linda University Health, 11234 Anderson St, Loma Linda, CA, 92354, USA
| | - Kuldeep Shah
- Division of Cardiology, Cardiac Arrhythmia Service, MercyOne Siouxland Heart and Vascular Center, Sioux City, IA, USA
| | - Rahul Bhardwaj
- Division of Cardiology, Cardiac Arrhythmia Service, Loma Linda University Health, 11234 Anderson St, Loma Linda, CA, 92354, USA
| | - Tahmeed Contractor
- Division of Cardiology, Cardiac Arrhythmia Service, Loma Linda University Health, 11234 Anderson St, Loma Linda, CA, 92354, USA
| | - Mohit K Turagam
- Helmsley Electrophysiology Center, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ravi Mandapati
- Division of Cardiology, Cardiac Arrhythmia Service, Loma Linda University Health, 11234 Anderson St, Loma Linda, CA, 92354, USA
| | | | - Jalaj Garg
- Division of Cardiology, Cardiac Arrhythmia Service, Loma Linda University Health, 11234 Anderson St, Loma Linda, CA, 92354, USA.
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Miziev S, Pawlak WA, Howard N. Comparative analysis of energy transfer mechanisms for neural implants. Front Neurosci 2024; 17:1320441. [PMID: 38292898 PMCID: PMC10825050 DOI: 10.3389/fnins.2023.1320441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 12/19/2023] [Indexed: 02/01/2024] Open
Abstract
As neural implant technologies advance rapidly, a nuanced understanding of their powering mechanisms becomes indispensable, especially given the long-term biocompatibility risks like oxidative stress and inflammation, which can be aggravated by recurrent surgeries, including battery replacements. This review delves into a comprehensive analysis, starting with biocompatibility considerations for both energy storage units and transfer methods. The review focuses on four main mechanisms for powering neural implants: Electromagnetic, Acoustic, Optical, and Direct Connection to the Body. Among these, Electromagnetic Methods include techniques such as Near-Field Communication (RF). Acoustic methods using high-frequency ultrasound offer advantages in power transmission efficiency and multi-node interrogation capabilities. Optical methods, although still in early development, show promising energy transmission efficiencies using Near-Infrared (NIR) light while avoiding electromagnetic interference. Direct connections, while efficient, pose substantial safety risks, including infection and micromotion disturbances within neural tissue. The review employs key metrics such as specific absorption rate (SAR) and energy transfer efficiency for a nuanced evaluation of these methods. It also discusses recent innovations like the Sectored-Multi Ring Ultrasonic Transducer (S-MRUT), Stentrode, and Neural Dust. Ultimately, this review aims to help researchers, clinicians, and engineers better understand the challenges of and potentially create new solutions for powering neural implants.
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Strik M, Ploux S, van der Zande J, Velraeds A, Fontagne L, Haïssaguerre M, Bordachar P. The Use of Electrocardiogram Smartwatches in Patients with Cardiac Implantable Electrical Devices. SENSORS (BASEL, SWITZERLAND) 2024; 24:527. [PMID: 38257619 PMCID: PMC10818505 DOI: 10.3390/s24020527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 01/02/2024] [Accepted: 01/12/2024] [Indexed: 01/24/2024]
Abstract
Unlimited access to ECGs using an over-the-counter smartwatch constitutes a real revolution for our discipline, and the application is rapidly expanding to include patients with cardiac implantable electronic devices (CIEDs) such as pacemakers (PMs) and implantable cardioverter defibrillators (ICDs). CIEDs require periodic evaluation and adjustment by healthcare professionals. In addition, implanted patients often present with symptoms that may be related to their PMs or ICDs. An ECG smartwatch could reveal information about device functioning, confirm normal device function, or aid in the case of device troubleshooting. In this review, we delve into the available evidence surrounding smartwatches with ECG registration and their integration into the care of patients with implanted pacemakers and ICDs. We explore safety considerations and the benefits and limitations associated with these wearables, drawing on relevant studies and case series from our own experience. By analyzing the current landscape of this emerging technology, we aim to provide a comprehensive overview that facilitates informed decision-making for both healthcare professionals and patients.
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Affiliation(s)
- Marc Strik
- Cardio-Thoracic Unit, Bordeaux University Hospital (CHU), F-33600 Pessac-Bordeaux, France; (S.P.); (M.H.); (P.B.)
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France; (J.v.d.Z.); (A.V.)
| | - Sylvain Ploux
- Cardio-Thoracic Unit, Bordeaux University Hospital (CHU), F-33600 Pessac-Bordeaux, France; (S.P.); (M.H.); (P.B.)
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France; (J.v.d.Z.); (A.V.)
| | - Joske van der Zande
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France; (J.v.d.Z.); (A.V.)
- Cardiovascular and Respiratory Physiology, Twente University, 7522 NB Enschede, The Netherlands
| | - Anouk Velraeds
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France; (J.v.d.Z.); (A.V.)
- Cardiovascular and Respiratory Physiology, Twente University, 7522 NB Enschede, The Netherlands
| | - Leslie Fontagne
- Cardio-Thoracic Unit, Bordeaux University Hospital (CHU), F-33600 Pessac-Bordeaux, France; (S.P.); (M.H.); (P.B.)
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France; (J.v.d.Z.); (A.V.)
| | - Michel Haïssaguerre
- Cardio-Thoracic Unit, Bordeaux University Hospital (CHU), F-33600 Pessac-Bordeaux, France; (S.P.); (M.H.); (P.B.)
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France; (J.v.d.Z.); (A.V.)
| | - Pierre Bordachar
- Cardio-Thoracic Unit, Bordeaux University Hospital (CHU), F-33600 Pessac-Bordeaux, France; (S.P.); (M.H.); (P.B.)
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France; (J.v.d.Z.); (A.V.)
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Fostier M, Gustin T, Deltombe T. Case Study of Intrathecal Baclofen Pump Motor Shutdown Secondary to the Effect of the Magnetic Field Created by a Personal Digital Tablet and Magnetic Cover. Am J Phys Med Rehabil 2023; 102:e160-e161. [PMID: 37205746 DOI: 10.1097/phm.0000000000002285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
ABSTRACT We present the case of a posttraumatic C6 AIS A tetraplegic patient with spasticity treated with an intrathecal baclofen pump, who noticed a transient increase in his spasticity each time he used a digital tablet (Ipad) protected by a magnetic shell placed on his abdomen. Telemetry confirmed transient motor shutdown responsible for withdrawal symptoms each time the tablet was used. Symptoms resolved after the removal of the protective shell. Effects of magnetic fields like magnetic resonance imaging are known to stall the pump rotor, which recover at the end of magnetic resonance imaging. Other sources of magnetic fields like laptops or new smartphones with magnet charging technology may also interfere with implanted devices. We therefore recommend patients to avoid close contact of magnetic devices with the intrathecal baclofen pump. More robust studies are warranted to assess the effect of the new magnetic technologies on the function of intrathecal pumps.
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Affiliation(s)
- Michele Fostier
- From the Department of Anesthesiology, CHU UCL Namur Site Godinne, Yvoir, Belgium (MF); Department of Neurosurgery, CHU UCL Namur Site Godinne, Yvoir, Belgium (TG); and Department of Physical Medicine and Rehabilitation, CHU UCL Site Godinne, Yvoir, Belgium (TD)
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Knops RE, Ganz L, Nevo JR. A Dual-Chamber Leadless Pacemaker. Reply. N Engl J Med 2023; 389:1056-1057. [PMID: 37703567 DOI: 10.1056/nejmc2308513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Affiliation(s)
- Reinoud E Knops
- Amsterdam University Medical Center, Amsterdam, the Netherlands
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Ideishi A, Yamagata K, Nishii T, Miyanooi H, Miyazaki Y, Wakamiya A, Shimamoto K, Ueda N, Nakajima K, Wada M, Kamakura T, Ishibashi K, Inoue Y, Miyamoto K, Noda T, Nagase S, Aiba T, Kusano K. Interference of cardiac implantable electronic devices and computed tomography imaging in the current era with a phantom model. J Arrhythm 2023; 39:580-585. [PMID: 37560271 PMCID: PMC10407191 DOI: 10.1002/joa3.12853] [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: 12/27/2022] [Revised: 03/20/2023] [Accepted: 04/02/2023] [Indexed: 08/11/2023] Open
Abstract
INTRODUCTION Cardiac implantable electronic devices are used in patients with cardiac rhythm disorders. Computed tomography irradiation is not prohibited for patients with cardiac implantable electronic devices, despite adverse events being reported. Hence, appropriate preparation and knowledge are required before computed tomography irradiation can be carried out in these patients. Since there is limited knowledge or literature about the influence of computed tomography irradiation in cases with recent cardiac implantable electronic devices, we aimed to evaluate the adverse events and elucidate the necessary and sufficient safety measures associated with this therapy. METHODS AND RESULTS We placed cardiac implantable electronic devices on an anthropomorphic phantom model and observed their electrical activity in electrograms, while various protocols of computed tomography irradiation were implemented and adverse events evaluated. Oversensing with pauses of up to 3.2 s was observed in standard computed tomography protocols, but ventricular tachyarrhythmia or other clinically significant events could not be confirmed. Oversensing with pauses of up to 8.0 s was observed and ventricular tachyarrhythmia was detected in the maximum-dose protocols. However, treatments such as antitachycardia pacing or shock therapy for ventricular tachyarrhythmia were not observed because of their absence. CONCLUSION Computed tomography irradiation for patients using cardiac implantable electronic devices is highly unlikely to cause clinically significant adverse events with the device settings and computed tomography protocols currently being used. Changing or monitoring the device settings routinely before computed tomography irradiation is not necessarily required for most patients.
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Affiliation(s)
- Akihito Ideishi
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
- Department of CardiologyFukuoka University School of MedicineFukuokaJapan
| | - Kenichiro Yamagata
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Tatsuya Nishii
- Department of RadiologyNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Hideto Miyanooi
- Department of RadiologyNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Yuichiro Miyazaki
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Akinori Wakamiya
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Keiko Shimamoto
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Nobuhiko Ueda
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Kenzaburo Nakajima
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Mitsuru Wada
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Tsukasa Kamakura
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Kohei Ishibashi
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Yuko Inoue
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Koji Miyamoto
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Takashi Noda
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Satoshi Nagase
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
- Department of Advanced Arrhythmia and Translational Medical ScienceNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Takeshi Aiba
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
| | - Kengo Kusano
- Department of Cardiovascular MedicineNational Cerebral and Cardiovascular CenterSuitaJapan
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Lennerz C, Schaarschmidt C, Blažek P, Knoll K, Kottmaier M, Reents T, Bourier F, Lengauer S, Popa M, Wimbauer K, Bahlke F, Krafft H, Englert F, Friedrich L, Schunkert H, Hessling G, Deisenhofer I, Kolb C, O'Connor M. High-power chargers for electric vehicles: are they safe for patients with pacemakers and defibrillators? Europace 2023; 25:euad042. [PMID: 37067822 PMCID: PMC10227864 DOI: 10.1093/europace/euad042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 01/25/2023] [Indexed: 04/18/2023] Open
Abstract
AIMS Battery electric vehicle (BEV) sales and use are rapidly expanding. Battery electric vehicles, along with their charging stations, are a potential source of electromagnetic interference (EMI) for patients with cardiac implantable electronic devices (CIEDs). The new 'high-power' charging stations have the potential to create strong electromagnetic fields and induce EMI in CIEDs, and their safety has not been evaluated. METHODS AND RESULTS A total of 130 CIED patients performed 561 charges of four BEVs and a test vehicle (350 kW charge capacity) using high-power charging stations under continuous 6-lead electrocardiogram monitoring. The charging cable was placed directly over the CIED, and devices were programmed to maximize the chance of EMI detection. Cardiac implantable electronic devices were re-interrogated after patients charged all BEVs and the test vehicle for evidence of EMI. There were no incidences of EMI, specifically no over-sensing, pacing inhibition, inappropriate tachycardia detection, mode switching, or spontaneous reprogramming. The risk of EMI on a patient-based analysis is 0/130 [95% confidence interval (CI) 0%-2%], and the risk of EMI on a charge-based analysis is 0/561 (95% CI 0%-0.6%). The effective magnetic field along the charging cable was 38.65 µT and at the charging station was 77.9 µT. CONCLUSIONS The use of electric cars with high-power chargers by patients with cardiac devices appears to be safe with no evidence of clinically relevant EMI. Reasonable caution, by minimizing the time spent in close proximity with the charging cables, is still advised as the occurrence of very rare events cannot be excluded from our results.
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Affiliation(s)
- Carsten Lennerz
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
- DZHK (German Centre for Cardiovascular Research) partner site Munich Heart Alliance, Pettenkoferstr. 8a & 9, 80336 Munich, Germany
| | - Claudia Schaarschmidt
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Patrick Blažek
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Katharina Knoll
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
- DZHK (German Centre for Cardiovascular Research) partner site Munich Heart Alliance, Pettenkoferstr. 8a & 9, 80336 Munich, Germany
| | - Marc Kottmaier
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
- DZHK (German Centre for Cardiovascular Research) partner site Munich Heart Alliance, Pettenkoferstr. 8a & 9, 80336 Munich, Germany
| | - Tilko Reents
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Felix Bourier
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Sarah Lengauer
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Miruna Popa
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Katharina Wimbauer
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Fabian Bahlke
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Hannah Krafft
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Florian Englert
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Lena Friedrich
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Heribert Schunkert
- DZHK (German Centre for Cardiovascular Research) partner site Munich Heart Alliance, Pettenkoferstr. 8a & 9, 80336 Munich, Germany
- German Heart Centre Munich, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Gabriele Hessling
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Isabel Deisenhofer
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Christof Kolb
- German Heart Centre Munich, Department of Electrophysiology, Technical University of Munich, Lazarettstr. 36, 80636 Munich, Germany
| | - Matthew O'Connor
- Cardiology Department, Auckland City Hospital, 2 Park Road, Grafton, 1023 Auckland, New Zealand
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Ha GB, Steinberg BA, Freedman R, Bayés-Genís A, Sanchez B. Safety evaluation of smart scales, smart watches, and smart rings with bioimpedance technology shows evidence of potential interference in cardiac implantable electronic devices. Heart Rhythm 2023; 20:561-571. [PMID: 36997272 DOI: 10.1016/j.hrthm.2022.11.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/21/2022] [Accepted: 11/27/2022] [Indexed: 02/24/2023]
Abstract
BACKGROUND Smart scales, smart watches, and smart rings with bioimpedance technology may create interference in patients with cardiac implantable electronic devices (CIEDs). OBJECTIVES The purpose of this study was to determine interference at CIEDs with simulations and benchtop testing, and to compare the results with maximum values defined in the ISO 14117 electromagnetic interference standard for these devices. METHODS The interference at pacing electrodes was determined by simulations on a male and a female computable model. A benchtop evaluation of representative CIEDs from 3 different manufacturers as specified in the ISO 14117 standard also was performed. RESULTS Simulations showed evidence of interference with voltage values exceeding threshold values defined in the ISO 14117 standard. The level of interference varied with the frequency and amplitude of the bioimpedance signal, and between male and female models. The level of interference generated with smart scale and smart rings simulations was lower than with smart watches. Across device manufacturers, generators demonstrated susceptibility to oversensing and pacing inhibition at different signal amplitudes and frequencies. CONCLUSIONS This study evaluated the safety of smart scales, smart watches, and smart rings with bioimpedance technology via simulation and testing. Our results indicate that these consumer electronic devices could interfere in patients with CIEDs. The present findings do not recommend the use of these devices in this population due to potential interference.
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Affiliation(s)
- Gia-Bao Ha
- Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah
| | - Benjamin A Steinberg
- Department of Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah
| | - Roger Freedman
- Department of Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah
| | - Antoni Bayés-Genís
- Department of Cardiology, Heart Institute, Hospital Universitari Germans Trias i Pujol, Badalona, Spain; Centro de Investigación Biomédica en Red Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain; Autonomous University of Barcelona, Barcelona, Spain
| | - Benjamin Sanchez
- Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah.
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Poorsattar SP, Kumar N, Jelly CA, Bodmer NJ, Tang JE, Lefevre R, Essandoh MK, Dalia A, Vanneman MW, Bardia A. The Year in Electrophysiology: Selected Highlights From 2022. J Cardiothorac Vasc Anesth 2023:S1053-0770(23)00194-5. [PMID: 37080842 DOI: 10.1053/j.jvca.2023.03.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 03/17/2023] [Indexed: 04/22/2023]
Abstract
This special article is the fifth in an annual series for the Journal of Cardiothoracic and Vascular Anesthesia. The authors would like to thank the Editor-in-Chief, Dr Kaplan, the Associate Editor-in-Chief, Dr Augoustides, and the editorial board for the opportunity to author this series, which summarizes the key research papers in the electrophysiology (EP) field relevant to cardiothoracic and vascular anesthesiologists. These articles are shaping perioperative EP procedures and practices, such as pulsed-field ablation, cryoablation for first-line treatment for atrial fibrillation, advancements in conduction system pacing, safety issues related to smartphones and cardiac implantable electronic devices, and alterations in EP workflow as the world emerges from the COVID-19 pandemic. Special emphasis is placed on the implications of these advancements for the anesthetic care of patients undergoing EP procedures.
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Affiliation(s)
- Sophia P Poorsattar
- Department of Anesthesiology and Perioperative Medicine, University of California Los Angeles David Geffen School of Medicine, Los Angeles, CA
| | - Nicolas Kumar
- Department of Anesthesiology, Pain Medicine, and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Christina A Jelly
- Department of Anesthesiology,Vanderbilt University Medical Center, Nashville, TN
| | - Natalie J Bodmer
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA
| | - Jonathan E Tang
- Division of Cardiothoracic and Vascular Anesthesia, Department of Anesthesiology, Ohio State University Wexner Medical Center, Columbus, OH
| | - Ryan Lefevre
- Department of Anesthesiology,Vanderbilt University Medical Center, Nashville, TN
| | - Michael K Essandoh
- Department of Anesthesiology, Ohio State University Wexner Medical Center, Columbus, OH
| | - Adam Dalia
- Division of Cardiac Anesthesiology, Department of Critical Care, Anesthesia, and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Matthew W Vanneman
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Stanford, CA
| | - Amit Bardia
- Division of Cardiac Anesthesiology, Department of Critical Care, Anesthesia, and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA.
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Saha N, Millward JM, Herrmann CJJ, Rahimi F, Han H, Lacour P, Blaschke F, Niendorf T. High-Fidelity 3D Stray Magnetic Field Mapping of Smartphones to Address Safety Considerations with Active Implantable Electronic Medical Devices. SENSORS (BASEL, SWITZERLAND) 2023; 23:1209. [PMID: 36772249 PMCID: PMC9919430 DOI: 10.3390/s23031209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/07/2023] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
Case reports indicate that magnets in smartphones could be a source of electromagnetic interference (EMI) for active implantable medical devices (AIMD), which could lead to device malfunction, compromising patient safety. Recognizing this challenge, we implemented a high-fidelity 3D magnetic field mapping (spatial resolution 1 mm) setup using a three-axis Hall probe and teslameter, controlled by a robot (COSI Measure). With this setup, we examined the stray magnetic field of an iPhone 13 Pro, iPhone 12, and MagSafe charger to identify sources of magnetic fields for the accurate risk assessment of potential interferences with AIMDs. Our measurements revealed that the stray fields of the annular array of magnets, the wide-angle camera, and the speaker of the smartphones exceeded the 1 mT limit defined by ISO 14117:2019. Our data-driven safety recommendation is that an iPhone 13 Pro should be kept at least 25 mm away from an AIMD to protect it from unwanted EMI interactions. Our study addresses safety concerns due to potential device-device interactions between smartphones and AIMDs and will help to define data-driven safety guidelines. We encourage vendors of electronic consumer products (ECP) to provide information on the magnetic fields of their products and advocate for the inclusion of smartphones in the risk assessment of EMI with AIMDs.
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Affiliation(s)
- Nandita Saha
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Ultrahigh Field Facility (B.U.F.F.), 13125 Berlin, Germany
- Experimental and Clinical Research Center (ECRC), A Joint Cooperation between the Charité Medical Faculty and the Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, 13125 Berlin, Germany
| | - Jason M. Millward
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Ultrahigh Field Facility (B.U.F.F.), 13125 Berlin, Germany
- Experimental and Clinical Research Center (ECRC), A Joint Cooperation between the Charité Medical Faculty and the Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, 13125 Berlin, Germany
| | - Carl J. J. Herrmann
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Ultrahigh Field Facility (B.U.F.F.), 13125 Berlin, Germany
- Department of Physics, Humboldt University of Berlin, 10117 Berlin, Germany
| | - Faezeh Rahimi
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Ultrahigh Field Facility (B.U.F.F.), 13125 Berlin, Germany
- Chair of Medical Engineering, Technische Universität Berlin, 10623 Berlin, Germany
| | - Haopeng Han
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Ultrahigh Field Facility (B.U.F.F.), 13125 Berlin, Germany
| | - Philipp Lacour
- Department of Cardiology, Charité—Universitätsmedizin Berlin, Campus Virchow-Klinikum, 13353 Berlin, Germany
| | - Florian Blaschke
- Department of Cardiology, Charité—Universitätsmedizin Berlin, Campus Virchow-Klinikum, 13353 Berlin, Germany
| | - Thoralf Niendorf
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Ultrahigh Field Facility (B.U.F.F.), 13125 Berlin, Germany
- Experimental and Clinical Research Center (ECRC), A Joint Cooperation between the Charité Medical Faculty and the Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, 13125 Berlin, Germany
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12
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Plawecki A, Tripathi N, Tovar Torres M, Yaremchuk K. Interference With Implanted Upper Airway Stimulation Device by Phones With Magnet Technology. Laryngoscope 2022; 132:2513-2515. [PMID: 35975894 DOI: 10.1002/lary.30348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/30/2022] [Accepted: 08/01/2022] [Indexed: 01/07/2023]
Abstract
Newer iPhone models with MagSafe magnetic technology can cause electromagnetic interference with the Inspire upper airway stimulator device (a surgical implant for the treatment of obstructive sleep apnea). Laryngoscope, 132:2513-2515, 2022.
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Affiliation(s)
- Andrea Plawecki
- Department of Otolaryngology-Head and Neck Surgery, Henry Ford Health, Detroit, Michigan, U.S.A
| | - Nitika Tripathi
- Wayne State University School of Medicine, Detroit, Michigan, U.S.A
| | - Maria Tovar Torres
- Division of Sleep Medicine, Department of Internal Medicine, Henry Ford Health, Detroit, Michigan, U.S.A
| | - Kathleen Yaremchuk
- Department of Otolaryngology-Head and Neck Surgery, Henry Ford Health, Detroit, Michigan, U.S.A
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13
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Badertscher P, Vergne C, Féry C, Mannhart D, Quirin T, Osswald S, Kühne M, Sticherling C, Knecht S, Pascal J. Magnetic field interactions of smartwatches and portable electronic devices with CIEDs - Did we open a Pandora's box? IJC HEART & VASCULATURE 2022; 43:101122. [PMID: 36111261 PMCID: PMC9467892 DOI: 10.1016/j.ijcha.2022.101122] [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: 08/30/2022] [Accepted: 09/03/2022] [Indexed: 12/02/2022]
Abstract
Introduction Magnetic interaction of portable electronic devices (PEDs), such as state-of-the art mobile phones, with cardiovascular implantable electronic devices (CIEDs) has been reported. The aim of the study was to quantify the magnetic fields of latest generation smartwatches and other PEDs and to evaluate and predict their risk of CIED interactions. Methods High resolution magnetic field characterization of five smartwatches (Apple Watch 6/7, Fitbit Sense, Samsung Galaxy 3, Withings Scanwatch) was performed using a novel magnetic field camera. Ex vivo measurements of the minimal safety distance (MSD) at which no mode switch can be observed were performed between 11 PEDs and six representative CIEDs. Results Maximal 1 mT distances ranged between 10 mm (Withings) and 19 mm (Fitbit and AppleWatch), and 1 mT volumes between 6 cm3 (Withings) and 19 cm3 (Fitbit). All these measures were observed only for the back side of the smartwatches. While most smartwatches with measured 1 mT distance < 15 mm posed low ex vivo interaction within a distance of < 10 mm, PEDs such as electronic pens and in-ear-headphones with measured 1 mT distance > 15 mm showed device interaction up to > 15 mm. Linear regression analysis showed a linear relationship of the MSD with 1 mT distance (B coefficient: 0.46; 95 %-CI: 0.25-0.67, p < 0.001). Conclusion Smartwatches are safer compared to other PEDs such as electronic pens or in-ear headphones with regards to CIED interaction. With a standardized magnetic field camera, the risk assessment of CIED interaction of novel PEDs is feasible.
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Affiliation(s)
- Patrick Badertscher
- Cardiovascular Research Institute Basel, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Céline Vergne
- Institute for Medical Engineering and Medical Informatics, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland
- Icube Laboratory, University of Strasbourg - CNRS, Strasbourg, France
| | - Corentin Féry
- Institute for Medical Engineering and Medical Informatics, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland
| | - Diego Mannhart
- Cardiovascular Research Institute Basel, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Thomas Quirin
- Institute for Medical Engineering and Medical Informatics, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland
- Icube Laboratory, University of Strasbourg - CNRS, Strasbourg, France
| | - Stefan Osswald
- Cardiovascular Research Institute Basel, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Michael Kühne
- Cardiovascular Research Institute Basel, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Christian Sticherling
- Cardiovascular Research Institute Basel, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Sven Knecht
- Cardiovascular Research Institute Basel, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Joris Pascal
- Institute for Medical Engineering and Medical Informatics, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland
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14
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Yan B. Actuators for Implantable Devices: A Broad View. MICROMACHINES 2022; 13:1756. [PMID: 36296109 PMCID: PMC9610948 DOI: 10.3390/mi13101756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/12/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
The choice of actuators dictates how an implantable biomedical device moves. Specifically, the concept of implantable robots consists of the three pillars: actuators, sensors, and powering. Robotic devices that require active motion are driven by a biocompatible actuator. Depending on the actuating mechanism, different types of actuators vary remarkably in strain/stress output, frequency, power consumption, and durability. Most reviews to date focus on specific type of actuating mechanism (electric, photonic, electrothermal, etc.) for biomedical applications. With a rapidly expanding library of novel actuators, however, the granular boundaries between subcategories turns the selection of actuators a laborious task, which can be particularly time-consuming to those unfamiliar with actuation. To offer a broad view, this study (1) showcases the recent advances in various types of actuating technologies that can be potentially implemented in vivo, (2) outlines technical advantages and the limitations of each type, and (3) provides use-specific suggestions on actuator choice for applications such as drug delivery, cardiovascular, and endoscopy implants.
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Affiliation(s)
- Bingxi Yan
- Department of Electrical and Computer Engineering, Ohio State University, Columbus, OH 43210, USA
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15
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Nowak B, Przibille O, Napp A. [Electromagnetic interference : Pacemakers, cardiac resynchronization therapy devices, implantable cardioverter-defibrillator]. Herzschrittmacherther Elektrophysiol 2022; 33:297-304. [PMID: 35781834 DOI: 10.1007/s00399-022-00875-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
Patients with cardiac pacemakers, implantable cardioverter-defibrillators (ICDs), and cardiac resynchronization therapy devices (CRT) are exposed to different types of electromagnetic interference (EMI) at home and at work. Due to the constantly increasing role of electrically active appliances in daily use and the introduction of new therapy concepts such as the leadless cardiac pacemaker and the subcutaneous defibrillator, this topic is of great relevance. The further development of the implanted devices and the almost complete use of bipolar leads has reduced the overall risk of EMI. This review article provides information about the current status of possible interference in the private environment and how to avoid it. In addition, information is provided on how to deal with occupational sources of interference.
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Affiliation(s)
- Bernd Nowak
- Cardioangiologisches Centrum Bethanien, Im Prüfling 23, 60389, Frankfurt a.M., Deutschland.
| | - Oliver Przibille
- Cardioangiologisches Centrum Bethanien, Im Prüfling 23, 60389, Frankfurt a.M., Deutschland
| | - Andreas Napp
- Medizinische Klinik I, - Kardiologie, Angiologie und Internistische Intensivmedizin, Uniklinik RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Deutschland
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16
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Patel H, Whitler C, Foster N, Bradley C, Shah D, Machado C. Implantable Cardioverter-defibrillator Magnetic Interference by the iPhone 12: Is It Clinically Significant? J Innov Card Rhythm Manag 2022; 13:5070-5072. [PMID: 35949649 PMCID: PMC9359423 DOI: 10.19102/icrm.2022.130702] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 01/21/2022] [Indexed: 11/07/2022] Open
Abstract
The iPhone 12 series (Apple, Inc., Cupertino, CA, USA) contains a circular array of magnets around a central charging coil (compatible with "Magsafe" technology). The device was recently reported to have magnetic interference with implantable cardioverter-defibrillators (ICDs). We sought to test the electromagnetic interference of the iPhone 12 in inhibiting life-saving therapies of ICDs in clinical settings. After obtaining written informed consent, an iPhone 12 was placed over the device generators of 17 patients in the ICD clinic. Device interrogation was performed immediately before and after placing the iPhone over the ICD generator to evaluate for any inhibition of device therapies. To emulate a real-world scenario, the iPhone 12 was not placed directly over the skin above the device generator but instead was positioned over the patients' clothes. None of the device interrogations revealed interruption of device therapies due to the iPhone. We concluded that, despite the iPhone having shown in vitro interference of ICD functioning, its effects are not clinically relevant in vivo. Larger studies need to be performed to confirm this finding and guide safety recommendations regarding the use of iPhones containing magnets by patients with implanted ICDs.
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Affiliation(s)
- Harshil Patel
- Division of Cardiology, Ascension Providence Hospital/MSUCHM, Southfield, MI, USA,Address correspondence to: Harshil Patel, MD, Division of Cardiology, Ascension Providence Hospital/MSUCHM, 16001 W. Nine Mile Rd, Southfield, MI 48075, USA.
| | - Cameron Whitler
- Division of Cardiology, Ascension Providence Hospital/MSUCHM, Southfield, MI, USA
| | - Nathan Foster
- Division of Cardiology, Ascension Providence Hospital/MSUCHM, Southfield, MI, USA
| | - Christopher Bradley
- Division of Cardiology, Ascension Providence Hospital/MSUCHM, Southfield, MI, USA
| | - Dipak Shah
- Division of Cardiology, Ascension Providence Hospital/MSUCHM, Southfield, MI, USA
| | - Christian Machado
- Division of Cardiology, Ascension Providence Hospital/MSUCHM, Southfield, MI, USA
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17
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Ellis CR, King NE. Cardiac Implantable Electronic Devices and Consumer Electronic Devices: The Proof Is in the Front Pocket. J Innov Card Rhythm Manag 2022; 13:5073-5076. [PMID: 35949651 PMCID: PMC9359421 DOI: 10.19102/icrm.2022.130706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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18
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Corbisiero R, Muller D. The Gallant™ system heart rhythm management device: making a connection. Future Cardiol 2022; 18:605-614. [PMID: 35748496 DOI: 10.2217/fca-2021-0117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Implantable cardiac defibrillators have revolutionized the way we prevent sudden cardiac death via arrhythmias. The addition of cardiac resynchronization pacing to defibrillators has broadened that treatment to include patients with heart failure and reduced ejection fraction. As with all technology, new devices and platforms expand the capabilities and interface with patients across the world. This review discusses the evolution from the initial modalities and methods of communication of implantable devices up to the most recent advances in implantable defibrillators and their integration into patient lives and clinical practice. This review is focused on the integration of Bluetooth communication into modern healthcare with the Gallant™ family of devices, the first branded launch by Abbott Laboratories.
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Affiliation(s)
| | - David Muller
- Abbott Laboratories, 15900 Valley View Ct, Sylmar, CA 91342, USA
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19
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Leavitt MA. CE: Guideline-Directed Cardiac Devices for Patients with Heart Failure. Am J Nurs 2022; 122:24-31. [PMID: 35551123 DOI: 10.1097/01.naj.0000832724.08294.fe] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
ABSTRACT Heart failure affects over 6.2 million adults in the United States and is expected to affect over 8 million by 2030. The U.S. one-year mortality rate is almost 30% among Medicare beneficiaries. Technological advances have produced several new cardiac devices that are available for therapy and symptom management. This article reviews current device therapies for heart failure and uses a composite case to demonstrate how bedside nurses can help patients understand treatment options related to their disease process and care for them through this experience.
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Affiliation(s)
- Mary Ann Leavitt
- Mary Ann Leavitt is an assistant professor at the Christine E. Lynn College of Nursing, Florida Atlantic University, Boca Raton. Contact author: . The author and planners have disclosed no potential conflicts of interest, financial or otherwise. A podcast with the author is available at www.ajnonline.com
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20
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Magnetic field interactions between current consumer electronics and cardiac implantable electronic devices. J Interv Card Electrophysiol 2022; 65:133-139. [PMID: 35538270 DOI: 10.1007/s10840-022-01241-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 04/30/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Electronic products, including the iPhone 12, Apple Watch Series 6, and 2nd Generation AirPods, contain magnets to facilitate wireless charging. Permanent magnets may affect CIED magnet mode features by causing pacemakers to pace asynchronously and defibrillators to suspend arrhythmia detection. This study determined if CIEDs are affected by static magnetic fields from commonly used portable electronics (PE) at any distance and intends to reinforce FDA recommendations concerning consumer PE which contain permanent magnets. METHODS The maximum magnet field measurement was evaluated by a Gauss meter. The interaction between PE and CIEDs from Boston Scientific and Medtronic were tested ex vivo using a body torso model. The CIED was placed in physiologic saline, and the PE was placed at the surface and at increasing distances of 0.5, 1.0, and 1.5 cm. Interactions were recorded by assessment of magnet mode status. RESULTS The iPhone 12 had almost three times the static magnetic field measured at the surface as the iPhone XR, but magnetic field strength decreased dramatically with increasing distance. At the surface of the model, PE triggered magnet mode in all CIEDs. The maximum interaction distance for all combinations of CIEDs and Apple products was 1.5 cm. CONCLUSIONS The iPhone 12 produces a stronger static magnetic field than previous iPhone models. Magnets in PE tested will not interact with CIEDs when they are 15 cm from the implanted device. Since no interaction was observed beyond 1.5 cm, it is unlikely that magnet mode activation will occur during most daily activities.
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21
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Safety and Efficacy of Magnet Use to Temporarily Inhibit Inappropriate Subcutaneous Implantable Cardioverter Defibrillator Therapy in Emergency Situations: A Case Report. JOURNAL OF CARDIOVASCULAR EMERGENCIES 2022. [DOI: 10.2478/jce-2022-0001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Introduction: The subcutaneous implantable cardioverter defibrillator (S-ICD) represents a major advancement in ICD technology. Inappropriate shocks (IAS) occur in more than 3.1% of the population with S-ICD each year and are usually followed by admission to the emergency department (ED). In this setting, the disabling of IAS is mandatory during a pseudo-electrical storm (ES). This report describes the strategies that can be followed in order to temporarily inhibit IAS in critical care settings with the use of magnets.
Case presentation: An S-ICD was implanted more than 6 weeks prior to presentation in a 68-year-old man with hypertrophic cardiomyopathy. In the ED, the patient experienced 3 IAS in the last hour. A Medtronic magnet was applied to stop IAS, as the specific programmer was not available. The maneuver interrupted the IAS. In order to verify the universal magnetic response of the S-ICD, six different magnets and one smartphone with MagSafe technology were tested. All magnet models suspended arrhythmia detection and IAS, while the smartphone did not cause magnet interferences.
Conclusions: This report demonstrates the safety and efficacy of all clinical magnet models in inhibiting IAS. In case of pseudo-ES, any type of magnet allows ED providers to easily and rapidly disable the functionality of the devices when appropriate.
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22
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Féry C, Desombre A, Quirin T, Badertscher P, Sticherling C, Knecht S, Pascal J. Magnetic Field Measurements of Portable Electronic Devices: The Risk Inside Pockets for Patients With Cardiovascular Implantable Devices. Circ Arrhythm Electrophysiol 2022; 15:e010646. [PMID: 35227069 DOI: 10.1161/circep.121.010646] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Corentin Féry
- Institute for Medical Engineering and Medical Informatics, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland (C.F., A.D., T.Q., J.P.)
| | - Adrien Desombre
- Institute for Medical Engineering and Medical Informatics, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland (C.F., A.D., T.Q., J.P.)
| | - Thomas Quirin
- Institute for Medical Engineering and Medical Informatics, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland (C.F., A.D., T.Q., J.P.).,Icube Laboratory, University of Strasbourg - CNRS, France (T.Q.)
| | - Patrick Badertscher
- Cardiovascular Research Institute Basel, University Hospital Basel, University of Basel, Switzerland (P.B., C.S., S.K.)
| | - Christian Sticherling
- Cardiovascular Research Institute Basel, University Hospital Basel, University of Basel, Switzerland (P.B., C.S., S.K.)
| | - Sven Knecht
- Cardiovascular Research Institute Basel, University Hospital Basel, University of Basel, Switzerland (P.B., C.S., S.K.)
| | - Joris Pascal
- Institute for Medical Engineering and Medical Informatics, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Muttenz, Switzerland (C.F., A.D., T.Q., J.P.)
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Nadeem F, Tran CT, Torbey E, Philbin D, Morales C, Wu M. Interference by Modern Smartphones and Accessories with Cardiac Pacemakers and Defibrillators. Curr Cardiol Rep 2022; 24:347-353. [PMID: 35084671 PMCID: PMC8979866 DOI: 10.1007/s11886-022-01653-0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/15/2021] [Indexed: 11/25/2022]
Abstract
Purpose of Review The risk of cardiac implantable electronic device (CIED) interference from cell phones was previously thought to be low based on older studies. Current generation of smartphones have incorporated more magnets for optimization of wireless charging, attachment of accessories, and convenience functionalities. These magnets have the potential to cause CIEDs to inadvertently revert into magnet mode. The purpose of this review is to summarize recent findings on smartphones and their accessories causing interference on CIEDs. Recent Findings Recent reports have demonstrated that the iPhone 12 series and accessories have the capability to cause CIED magnetic interference. Summary Current generation of smartphones, smartwatches, wireless headphones, and accessories have the potential to cause CIEDs to revert into magnet mode in both in vivo and ex vivo experiments. The risk of a clinically significant event is unlikely as long as the Food and Drug Administration (FDA) recommendations are followed; keeping smartphones and accessories at least six inches away from CIEDs.
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Affiliation(s)
- Fahd Nadeem
- Division of Cardiology, Department of Medicine, Lifespan Cardiovascular Institute and Brown University, Providence, RI, USA
| | - Cao Thach Tran
- Division of Cardiology, Department of Medicine, Lifespan Cardiovascular Institute and Brown University, Providence, RI, USA
| | - Estelle Torbey
- Division of Cardiology, Department of Medicine, Lifespan Cardiovascular Institute and Brown University, Providence, RI, USA
| | - Daniel Philbin
- Division of Cardiology, Department of Medicine, Lifespan Cardiovascular Institute and Brown University, Providence, RI, USA
| | - Carlos Morales
- Division of Cardiology, Department of Medicine, Lifespan Cardiovascular Institute and Brown University, Providence, RI, USA
| | - Michael Wu
- Division of Cardiology, Department of Medicine, Lifespan Cardiovascular Institute and Brown University, Providence, RI, USA.
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Censi F, Mattei E, Onder G, Calcagnini G. iPhone 12 MagSafe technology and cardiac implantable devices: assessment of the actual risk. Pacing Clin Electrophysiol 2022; 45:410-417. [PMID: 35076120 PMCID: PMC9303345 DOI: 10.1111/pace.14450] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 12/06/2021] [Accepted: 01/16/2022] [Indexed: 12/02/2022]
Abstract
Background Pacemaker (PM) and implantable cardioverter defibrillators (ICD) are equipped with a magnetic sensor activated by external application of magnets to easily manage some functions of these devices. If activated inadvertently or outside a controlled environment and without the supervision of clinical personnel, this magnetic mode introduces a potential risk. In reality, the possibility of a static magnetic field affecting a PM or ICD is remote. However, the presence of the magnet in the iPhone 12 made the possibility of inadvertently activating the magnetic switch of PM and ICD less remote. Objective This study investigates the effects of magnetic interference of the iPhone 12 on a large set of cardiac implantable devices representative of the current market and proposes adequate rules of conduct. Methods We investigated the risk of the magnetic interference of the iPhone 12 and its MagSafe accessories on a comprehensive set of PMs and ICDs, including the subcutaneous ICD. For the first time, the magnetic interference phenomena were correlated with the magnetic field levels measured all around iPhone 12. Results We discovered that the magnets inside iPhone 12 trigger the magnetic mode in the 12 tested devices up to a distance of 1 cm. Conclusions Considering the implications related to the activation of the magnetic switch, to date, it is advisable to follow Apple's indications relating to the safety distance of 15 cm, which is widely compatible with the results obtained from this paper and in line with the indications provided by the implantable cardiac device manufacturers.
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Affiliation(s)
- Federica Censi
- Department of Cardiovascular, Endocrine-Metabolic diseases and Ageing, Italian National Institute of health, Rome, Italy
| | - Eugenio Mattei
- Department of Cardiovascular, Endocrine-Metabolic diseases and Ageing, Italian National Institute of health, Rome, Italy
| | - Graziano Onder
- Department of Cardiovascular, Endocrine-Metabolic diseases and Ageing, Italian National Institute of health, Rome, Italy
| | - Giovanni Calcagnini
- Department of Cardiovascular, Endocrine-Metabolic diseases and Ageing, Italian National Institute of health, Rome, Italy
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25
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Kumar A, Pervaiz A, Borg A, Abdul-Hamid A, Jeyaretna S, MacKeith S, Qureishi A. Effect of exposure from iPhone 12 on programmable ventriculoperitoneal shunts. Br J Neurosurg 2022; 36:415-419. [DOI: 10.1080/02688697.2022.2028724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Ameeta Kumar
- Faculty of Medical and Dental Education, Royal Berkshire Hospital NHS Trust, Reading, UK
| | - Arbaaz Pervaiz
- Department of Ear, Nose and Throat, Oxford University Hospitals NHS Trust, Oxford, UK
| | - Anouk Borg
- Department of Neurosurgery, Oxford University Hospitals NHS Trust, Oxford, UK
| | - Ayeshah Abdul-Hamid
- Department of Ear, Nose and Throat, Royal Berkshire Hospital NHS Trust, Reading, UK
| | - Sanjeeva Jeyaretna
- Department of Neurosurgery, Oxford University Hospitals NHS Trust, Oxford, UK
| | - Samuel MacKeith
- Department of Ear, Nose and Throat, Oxford University Hospitals NHS Trust, Oxford, UK
| | - Ali Qureishi
- Department of Ear, Nose and Throat, Oxford University Hospitals NHS Trust, Oxford, UK
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Magnetic field-induced interactions between phones containing magnets and cardiovascular implantable electronic devices: Flip it to be safe? Heart Rhythm 2021; 19:372-380. [PMID: 34767986 DOI: 10.1016/j.hrthm.2021.11.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/19/2021] [Accepted: 11/04/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND Recent case reports and small studies have reported activation of the magnet-sensitive switches in cardiovascular implantable electronic devices (CIEDs) by the new iPhone 12 series, initiating asynchronous pacing in pacemakers and suspension of antitachycardia therapies in implantable cardioverter-defibrillators (ICDs). OBJECTIVE The purpose of this prospective single-center observational study was to quantify the risk of magnetic field interactions of the iPhone 12 with CIEDs. METHODS A representative model of each CIED series from all manufacturers was tested ex vivo. Incidence and minimum distance necessary for magnet mode triggering were analyzed in 164 CIED patients with either the front or the back of the phone facing the device. The magnetic field of the iPhone 12 was analyzed using a 3-axis Hall probe. RESULTS Ex vivo, magnetic interference occurred in 84.6% with the back compared to 46.2% with the front of the iPhone 12 facing the CIED. In vivo, activation of the magnet-sensitive switch occurred in 30 CIED patients (18.3%; 21 pacemaker, 9 ICD) when the iPhone 12 was placed in close proximity over the CIED pocket and the back of the phone was facing the skin. Multiple binary logistic regression analysis identified implantation depth (95% confidence interval 0.02-0.24) as an independent predictor of magnet-sensitive switch activation. CONCLUSION Magnetic field interactions occur only in close proximity and with precise alignment of the iPhone 12 and CIEDs. It is important to advise CIED patients to not put the iPhone 12 directly on the skin above the CIED. Further recommendations are not necessary.
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