Unshielded magnetocardiography: Repeatability and reproducibility of automatically estimated ventricular repolarization parameters in 204 healthy subjects
Open accessAbstract
Background: Magnetocardiographic mapping (MCG) provides quantitative assessment of the magnetic field (MF) induced by cardiac ionic currents, is more sensitive to tangential currents, and measures vortex currents undetectable by ECG, with higher reported sensitivity of MCG ventricular repolarization (VR) parameters for earlier detection of acute myocardial ischemia. Aims of this study were to validate the feasibility of in‐hospital unshielded MCG and to assess repeatability and reproducibility of quantitative VR parameters, considering also possible gender‐ and age‐related variability. Methods: MCG of 204 healthy subjects [114 males—mean age 43.4 ± 17.3 and 90 females—mean age 40.2 ± 15.7] was retrospectively analyzed, with a patented proprietary software automatically estimating twelve VR parameters derived from the analysis of the dynamics of the T‐wave MF extrema (five parameters) and from the inverse solution with the effective magnetic dipole model giving the effective magnetic vector components (seven parameters). MCG repeatability was calculated as coefficient of variation (CV) ±standard error of the mean (SEM). Reproducibility was assessed as intraclass correlation coefficient (ICC). Results: The repeatability of all MCG parameters was 16 ± 1.2 (%) (average CV ± SEM). Optimal (ICC > 0.7) reproducibility was found for 11/12 parameters (mean values) and in 8/12 parameters (single values). No significant gender‐related difference was observed; six parameters showed a strong/moderate correlation with age. Conclusion: Reliable MCG can be performed into an unshielded hospital ambulatory, with repeatability and reproducibility of quantitative assessment of VR adequate for clinical purposes. Wider clinical use is foreseen with the development of multichannel optical magnetometry.
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There is increasing evidence that progress in magnetic sensor technology combined with more advanced signal denoising methods is rapidly reaching the requirements for near-future availability of several novel device variants for budget-price unshielded MCG.
“Instead, as concerns most routine clinical MCG applications, there is an increasing evidence that progress in magnetic sensor technology combined with more advanced signal denoising methods is rapidly reaching the requirements for the near-future availability of several novel device variants for budget-price unshielded MCG, covering the needs of different deployment scenarios, from ED triage for”
From Clinical magnetocardiography: the unshielded bet—past, present, and future (2023) · cites this paper as [189]
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Self-citation
- Authors
- Sorbo, A. R., Lombardi, G., La Brocca, L., Guida, G., Fenici, R., & Brisinda, D.
- Affiliations
- Università Cattolica del Sacro Cuore (IT)
- Biomagnetism and Clinical Physiology International Center Catholic University of Sacred Heart Rome Italy
- Corresponding author
- Fenici, Riccardo
- Venue
- Annals of Noninvasive Electrocardiology
- Publisher
- Wiley
- Published
- 2017-12-20
- Volume
- 23
- Issue
- 3
- Pages
- e12526-e12526
- ISSN
- 1082-720X (ISSN-L)
- 1542-474X
- PMC
- PMC6931803
- OpenAlex
- W2781115165
- Cited by
- 18
- References
- 58
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 1 · 2023: 1 · 2022: 3 · 2021: 1 · 2020: 4 · 2019: 3
- FWCI
- 1.48
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Annals of Noninvasive Electrocardiology (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › ECG Monitoring and Analysis
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart Rate Variability and Autonomic Control
- Keywords
- magnetocardiography, ventricular repolarization, inverse solution, repeatability, reproducibility, sex differences, age-related variation, healthy volunteers, optical magnetometry
- MeSH terms
- Adolescent, Adult, Aged, Aged, 80 and over, Child, Child, Preschool, Feasibility Studies, Female, Humans, Male, Middle Aged, Reference Values, Retrospective Studies, Reproducibility of Results, Ventricular Function, Magnetocardiography, Young Adult
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