PULSE MODULATED UHF ENERGY ILLUMINATION OF THE HEART ASSOCIATED WITH CHANGE IN HEART RATE
Allan H. Frey, Elwood Seifert · 1968
1968 research showed pulse-modulated UHF electromagnetic energy could alter heart rate in animals, demonstrating early evidence of RF field effects on cardiovascular function.
Plain English Summary
This 1968 study by researcher A.H. Frey investigated whether pulse-modulated UHF (ultra-high frequency) electromagnetic energy could affect heart rate in animals. The research examined the cardiovascular response to specific patterns of electromagnetic illumination, representing early scientific investigation into how pulsed radiofrequency fields might influence biological systems.
Why This Matters
This research represents pioneering work in understanding how electromagnetic fields can directly influence vital biological functions like heart rate. What makes this particularly significant is that it was conducted in 1968, decades before the widespread use of cell phones, WiFi, and other devices that emit similar pulsed radiofrequency signals. The study's focus on pulse-modulated UHF energy is especially relevant today, as many modern wireless devices use pulsed signals rather than continuous waves. The fact that researchers could demonstrate measurable changes in heart rate from electromagnetic exposure suggests our cardiovascular system may be more sensitive to RF fields than commonly recognized. This early work laid important groundwork for understanding how the specific characteristics of electromagnetic signals - not just their power levels - can influence biological processes.
Finding
Statistically significant changes in heart rhythm were associated with the UHF illumination.
In their words
“Statistically significant changes in heart rhythm were associated with the UHF illumination.”
Figures from the Original Paper
Diagram extracted from the original research document.
Exposure Information
Specific exposure levels were not quantified in this study. Duration: 10 seconds per pulse, 10 microseconds per pulse
Study Details
To investigate the effects of pulse modulated UHF energy on heart rate using isolated frog hearts, synchronizing the UHF pulses with the P wave of the ECG to attempt to induce a positive feedback condition.
Twenty-two isolated frog hearts were illuminated with UHF energy pulses synchronized with the P wave...
When the heart was illuminated 200 msec after the P wave, about the time the QRS complex occurred, t...
This data, considered with the data cited in the introduction, provide reason for a more complete investigation of the effect of modulated UHF energy on the heart. Such a complete investigation may well show that this energy can be a useful tool in the study of cardiac function.
Show BibTeX
@article{pulse_modulated_uhf_energy_illumination_of_the_heart_associated_with_change_in_h_g57,
author = {Allan H. Frey and Elwood Seifert},
title = {PULSE MODULATED UHF ENERGY ILLUMINATION OF THE HEART ASSOCIATED WITH CHANGE IN HEART RATE},
year = {1968},
}