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Published on: January 6, 2019
Harnessing the Heart's Magnetic Field for Advanced Diagnostic Techniques
1Department of Electrical and Computer Engineering, Tennessee Technological University, Cookeville, TN 38505, USA.
Insights
Magnetic field detection offers a promising, noninvasive method for continuous heart disease diagnosis, overcoming limitations of traditional electrocardiograms (ECG). Current challenges include developing affordable and portable sensing technology for widespread clinical use.
Area of Science:
- Biomedical Engineering
- Cardiology
- Medical Physics
Background:
- Heart diseases are a major global health concern, driving the need for advanced diagnostic tools.
- Electrocardiograms (ECG) are standard for heart condition diagnosis but are unsuitable for continuous monitoring due to skin irritation.
- The heart generates a measurable magnetic field, offering a potential noninvasive diagnostic avenue.
Purpose of the Study:
- To review techniques for capturing the heart's magnetic signals.
- To comprehensively examine diagnostic approaches utilizing the heart's magnetic field for various heart conditions.
- To highlight the potential and limitations of magnetocardiography in cardiac diagnostics.
Main Methods:
- Literature review of existing techniques for sensing magnetic fields generated by the heart.
- Analysis of studies employing magnetocardiography for diagnosing cardiac pathologies.
- Evaluation of the sensitivity, affordability, and portability of current sensing technologies.
Main Results:
- The heart's magnetic field, though weak (10-100 pT), can be captured using specialized techniques.
- Magnetocardiography shows potential for sensitive, noninvasive, and continuous cardiac monitoring.
- Current limitations include the lack of accurate, affordable, and portable sensing technology.
Conclusions:
- The magnetic field of the heart presents a valuable, noninvasive biomarker for advanced cardiac diagnostics.
- Continuous monitoring using heart magnetic fields could significantly improve early detection and management of heart diseases.
- Technological advancements in sensor development are crucial for realizing the full clinical potential of magnetocardiography.
Abstract:
Heart diseases remain one of the leading causes of morbidity and mortality worldwide, necessitating innovative diagnostic methods for early detection and intervention. An electrocardiogram (ECG) is a well-known technique for the preliminary diagnosis of heart conditions. However, it can not be used for continuous monitoring due to skin irritation. It is well known that every body organ generates a magnetic field, and the heart generates peak amplitudes of about 10 to 100 pT (measured at a distance of about 3 cm above the chest). This poses challenges to capturing such signals. This paper reviews the different techniques used to capture the heart's magnetic signals along with their limitations. In addition, this paper provides a comprehensive review of the different approaches that use the heart-generated magnetic field to diagnose several heart diseases. This research reveals two aspects. First, as a noninvasive tool, the use of the heart's magnetic field signal can lead to more sensitive advanced heart disease diagnosis tools, especially when continuous monitoring is possible and affordable. Second, its current use is limited due to the lack of accurate, affordable, and portable sensing technology.
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