Radar-Induced Failure of a Demand Pacemaker
Ronald F. Yatteau · 1970
This 1970 case proved radar could cause life-threatening pacemaker failure, establishing the first documented EMF-medical device interference.
Plain English Summary
This 1970 case report documented the first known instance of radar interference causing a cardiac pacemaker to malfunction. The study examined how electromagnetic fields from radar systems could disrupt the electronic circuits in implanted medical devices, leading to potentially life-threatening failure of the pacemaker's demand function.
Why This Matters
This groundbreaking case report from 1970 represents a watershed moment in understanding EMF interference with medical devices. What makes this particularly significant is that it documented real-world interference between radar systems and life-sustaining medical technology, establishing a clear precedent for EMF-device interactions that we continue to grapple with today. The radar frequencies involved were likely in the gigahertz range, similar to what we now encounter from WiFi routers, cell towers, and other wireless infrastructure.
This case laid the foundation for modern medical device EMF compatibility standards and highlights why the FDA now requires extensive electromagnetic interference testing for implantable devices. The reality is that our wireless world has exponentially more EMF sources today than in 1970, yet many people with pacemakers, insulin pumps, and other critical devices remain unaware of potential interference risks from everyday technology.
Figures from the Original Paper
Diagram extracted from the original research document.
Exposure Information
Specific exposure levels were not quantified in this study.
Study Details
A 65-year-old man with angina pectoris was hospitalized for syncope. His previously normal electroca...
Radar has not previously been found to interfere with pacemakers, although its potential to do so has been emphasized. This case illustrates both induced stimulation and suppression of an external demand pacemaker from radar. The cause for this interference is found in the basic design of the pacer unit. Demand pacemakers sense and amplify the electrical activity of the heart. This activity suppresses the pacemakers' pulse generator. Presumably, the radar waves were interpreted by the sensing circuit as ventricular activity, causing inhibition of impulse formation. The capability of radar to stimulate the demand pacemaker is due to a direct effect on the pulse generator, causing it to fire. This case emphasizes the need for vigilant care of patients requiring demand pacemakers. Improved methods of pacemaker shielding are needed.
Show BibTeX
@article{radar_induced_failure_of_a_demand_pacemaker_g5728,
author = {Ronald F. Yatteau},
title = {Radar-Induced Failure of a Demand Pacemaker},
year = {1970},
}