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MICROWAVE OVENS: A POTENTIAL RISK TO PATIENTS WITH CARDIAC PACEMAKERS

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REFSHAUGE · 1971

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This 1971 study pioneered research into microwave oven interference with cardiac pacemakers, establishing early EMF medical device safety concerns.

Plain English Summary

Summary written for general audiences

This 1971 research examined whether microwave ovens could interfere with cardiac pacemakers, making it one of the earliest studies to investigate electromagnetic interference between common household appliances and critical medical devices. The study addressed growing concerns about the safety of microwave technology for people with implanted pacemakers.

Why This Matters

This research represents a pivotal moment in EMF health awareness, published just as microwave ovens were entering American homes. The science demonstrates that electromagnetic interference with medical devices isn't a theoretical concern but a documented reality that required immediate attention. What makes this study particularly significant is its timing - 1971 marked the beginning of our modern electronic age, yet researchers were already identifying potential risks to vulnerable populations. The reality is that pacemaker interference remains a concern today, with the FDA continuing to issue guidance about EMF sources and medical devices. Put simply, this early research established a critical principle: we must consider how electromagnetic fields affect people with medical implants, a population that has only grown as medical technology advances.

Exposure Information

Specific exposure levels were not quantified in this study.

Study Details

To draw attention to what is believed to be the first reported instance of interference with the functioning of an implanted cardiac pacemaker of the second category by microwave radiation emerging from a microwave oven.

The patient, monitored by an ECG, was deliberately exposed to radiation from another microwave oven....

One of these patients, using a pacemaker identical to that of the initial patient, demonstrated an e...

Microwave radiation from a microwave oven can interfere with the functioning of certain types of implanted cardiac pacemakers, particularly those with ventricular sensing.

Cite This Study
REFSHAUGE (1971). MICROWAVE OVENS: A POTENTIAL RISK TO PATIENTS WITH CARDIAC PACEMAKERS.
Show BibTeX
@article{microwave_ovens_a_potential_risk_to_patients_with_cardiac_pacemakers_g4262,
  author = {REFSHAUGE},
  title = {MICROWAVE OVENS: A POTENTIAL RISK TO PATIENTS WITH CARDIAC PACEMAKERS},
  year = {1971},
  
  
}
No DOI on file for this study.

Quick Questions About This Study

Microwave ovens were becoming popular household appliances, and researchers needed to determine if their electromagnetic emissions could interfere with the electronic circuits in cardiac pacemakers, potentially causing life-threatening malfunctions.
This was among the first studies to examine electromagnetic interference between common household appliances and medical devices, establishing the foundation for modern EMF safety guidelines for people with implants.
Microwave ovens emit electromagnetic fields that can interfere with pacemaker circuits, potentially causing the device to malfunction, miss heartbeats, or deliver inappropriate electrical stimulation to the heart.
Modern pacemakers have better shielding than 1970s models, but the FDA still recommends maintaining distance from microwave ovens and ensuring proper door seals to minimize interference risk.
Cell phones, induction cooktops, wireless chargers, security systems, and even some electric tools can potentially interfere with pacemakers, requiring ongoing vigilance from patients and caregivers.