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Updated: Jul 16, 2026

Cardiac Magnetic Resonance Imaging at 7 Tesla

Cardiac Magnetic Resonance Imaging at 7 Tesla

Published on: January 6, 2019

Extremely low-frequency magnetic fields and heart disease.

Leeka Kheifets¹, Anders Ahlbom, Christoffer Johansen

¹UCLA School of Public Health, Department of Epidemiology, 73-284 CHS, 650 Charles E Young Drive South, Los Angeles, CA 90095-1772, USA. kheifets@ucla.edu

Scandinavian Journal of Work, Environment & Health

|March 14, 2007

Summary

Magnetic fields likely do not increase the risk of cardiac issues like arrhythmia or heart attacks. Extensive research, including epidemiological studies, found no evidence linking magnetic field exposure to cardiovascular disease. This resolves a significant public health question.

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Area of Science:

Environmental health
Cardiovascular epidemiology
Electromagnetic fields

Background:

A hypothesis suggested magnetic fields increase risks for cardiac arrhythmia and acute myocardial infarction.
This was initially supported by an early epidemiological study, raising public health concerns due to common exposure.
Subsequent research has largely failed to replicate these initial findings.

Purpose of the Study:

To present the scientific basis for the hypothesis linking magnetic fields to cardiovascular disease.
To review and analyze epidemiological studies that tested this hypothesis.
To provide a conclusive assessment of the relationship between electromagnetic field exposure and cardiovascular health.

Main Methods:

Review of the biological hypothesis regarding magnetic fields and cardiovascular events.
Analysis of epidemiological studies investigating the link between magnetic field exposure and cardiovascular disease.
Discussion of methodological challenges in low-level environmental exposure research.

Main Results:

The initial hypothesis was based on limited evidence and has not been supported by subsequent, more robust studies.
The majority of epidemiological research found no significant association between magnetic field exposure and cardiovascular disease.
Methodological difficulties in studying low-level environmental exposures were significant.

Conclusions:

The current body of evidence strongly suggests no etiological relationship between exposure to electric and magnetic fields and cardiovascular disease.
The scientific inquiry into magnetic fields and cardiovascular health is considered successfully resolved.
This case highlights the process of scientific resolution despite research complexities.