Browse 8,700 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 543 studies in Cardiovascular
J. L. Lords, C. H. Durney, A. M. Borg, C. E. Tinney · 1974
Researchers exposed isolated frog hearts to 960 MHz microwave radiation and found it caused bradycardia (slowed heart rate) at very specific power levels around 3 milliwatts. This contradicted expectations since general heating typically speeds up heart rate, suggesting the microwaves directly stimulated remaining nerve tissue in the hearts.
A. A. Marino, T. J. Berger, R. O. Becker · 1974
This 1974 study by Marino examined how electrostatic fields affect blood proteins in mice, specifically looking at changes in albumin, beta-proteins, and gamma-proteins in blood serum. The research found measurable effects on these important blood components, suggesting that even static electric fields can influence biological systems at the molecular level.
Belkhode M., Johnson DL., Muc AM. · 1974
Researchers exposed human blood samples to 2.8 GHz microwave radiation at high power levels (500-1000 mW/cm²) to test whether microwaves could damage an important enzyme called glucose-6-phosphate dehydrogenase through non-thermal effects. They found that while heat from the microwaves reduced enzyme activity by up to 80%, the microwaves themselves caused no statistically significant damage beyond what heat alone would cause.
I. S. Fedorova, et al · 1974
This 1974 Soviet research report examined multiple effects of microwave electromagnetic radiation on biological systems, including impacts on protein structures and blood cell formation. The study investigated how microwave frequencies affect paramagnetic centers in proteins and explored the combined effects of microwave and gamma radiation on the body's blood-producing system. This early research contributed to understanding how microwave radiation interacts with biological materials at the cellular level.
William H. Houk, Sol M. Michaelson · 1974
This 1974 study examined how microwave radiation affects metabolism and temperature regulation in 400 young male rats over several weeks. Researchers used sophisticated equipment to measure biological responses during controlled exposure sessions lasting up to 3 hours. The study aimed to resolve questions about microwave radiation's short-term effects on basic body functions.
Volkova AP, Fukalova PP · 1974
Soviet researchers exposed rats to 14.88 MHz shortwave radiation at two different intensities and durations, then measured immune system function through blood cell activity. The study examined both laboratory animals and industrial workers exposed to shortwave frequencies. Results focused on natural immunity markers including white blood cell function and blood's ability to kill bacteria.
Hamid Dalili, John Adriani, Wei T. Wu, Monroe S. Samuels · 1973
Researchers in 1973 investigated electromagnetic blood warming devices used in hospitals, which heat donated blood to body temperature before transfusions using radiowave and microwave energy. They found reports of overheating and red blood cell damage (hemolysis) with these devices, prompting their detailed study to evaluate whether electromagnetic radiation compromises blood integrity.
David B. Geselowitz · 1973
This 1973 research by David Geselowitz examined the natural electrical and magnetic fields produced by the human heart during normal function. The study focused on understanding how the heart's electrical activity creates measurable electromagnetic fields that can be detected outside the body, forming the scientific foundation for electrocardiogram (ECG) technology.
Clair M. Becker, Inder V. Malhotra, John Hedley-Whyte · 1973
This 1973 study documented nine patients who suffered burns at electrocardiogram electrode sites during electrosurgery procedures. Researchers found that radiofrequency current from surgical equipment was flowing through ECG monitoring cables, with currents reaching up to 290 milliamperes - enough to cause skin damage at approximately 100 milliamperes per square centimeter.
Davis JA · 1973
This 1973 technical paper examined microwave oven radiation concerns in aircraft, particularly for passengers with pacemakers. The study found that while some publications warned of health hazards, technical experts generally considered the risks minimal. The paper provided engineering guidelines for evaluating microwave oven installations on aircraft.
G. A. Stasiuk · 1973
Soviet researchers exposed 60 healthy people to a single, brief session of constant magnetic field exposure at 1650 oersted intensity. They found significant blood changes including increased red blood cell count, hemoglobin levels, and clotting factors, plus reduced white blood cells. These effects persisted for a full month after just one exposure.
Charles H. Bonney, Pedro L. Rustan, Jr., Gary E. Ford · 1973
Researchers implanted cardiac pacemakers in dogs and exposed them to microwave oven frequencies (915 and 2450 MHz) and radar frequencies (2810 and 3050 MHz). The study found that specific field strengths could completely shut down pacemakers, with 915 MHz requiring only 75 V/m while higher frequencies needed 250 V/m. This 1973 research established the first quantitative safety thresholds for pacemaker interference from common electromagnetic sources.
Kolesnik, F. A., N. A. Komogortseva · 1973
Soviet researchers studied workers exposed to microwave radiation from SHF generators and found they had significantly reduced sulfhydrile (SH) groups in their blood. These workers also showed various health problems including nervous system dysfunction and cardiovascular issues. The study suggested measuring SH groups could serve as an early warning test for microwave radiation damage.
George F. D'Cunha et al. · 1973
A patient with a Medtronic 5842 pacemaker experienced repeated fainting episodes caused by radio frequency interference from a nearby television transmitter. The interference disrupted the pacemaker's normal function, but switching to a titanium-shielded model solved the problem.
Г. А. СЛАСЮК · 1973
This 1973 Soviet research by G.A. Slasyuk investigated how magnetic fields affect human blood components, specifically studying changes in hemoglobin, red blood cells, and white blood cells. The study represents early scientific recognition that electromagnetic fields can produce measurable biological effects in human blood. This work contributed to the growing body of evidence that EMF exposure can alter fundamental cellular processes in the human body.
G. A. Stasiuk · 1973
Soviet researchers exposed 20 healthy people to a single, short-term magnetic field treatment at 1850 oersted intensity and found positive health changes. Participants experienced improved appetite, mood, normalized blood pressure, and increased red blood cells and hemoglobin levels that lasted up to a month.
George F. D'Cunha et al. · 1973
A patient with a Medtronic 5842 pacemaker experienced repeated fainting episodes (syncope) caused by radio frequency interference from a nearby television transmitter. The RF signals disrupted the pacemaker's normal function, but switching to a titanium-shielded Medtronic 5942 model solved the problem.
ROTA, P. · 1973
This 1973 technical report examined blood changes that occur when people are exposed to acute heat stress. While heat exposure isn't electromagnetic radiation, the hematological (blood) effects studied here provide important context for understanding how environmental stressors can alter blood chemistry and cellular function.
G. Fischer · 1973
Researchers in 1973 studied how artificial electrostatic fields affect animal physiology and found that positively charged constant fields increased liver activity, oxygen consumption, and immune system readiness. When animals were shielded from these fields in Faraday cages, the opposite effects occurred. The study suggests that natural atmospheric electrical fields may play an important role in maintaining health and metabolism.
James L. Lords et al. · 1973
Researchers exposed isolated hearts from cold-blooded animals to 960 MHz microwave radiation and found it caused the hearts to beat slower (bradycardia), which is the opposite of what normally happens when hearts are heated. This unexpected effect only occurred at very specific power levels around 3 milliwatts absorbed by the heart tissue.
В. П. Медведев · 1973
This 1941 Russian study by Kokhanovich examined cardiovascular effects in workers exposed to microwave electromagnetic fields. The research represents one of the earliest documented investigations into occupational microwave exposure and heart health. While specific findings aren't available, the study's focus on cardiovascular impacts from workplace microwave exposure was pioneering for its time.
Unknown authors · 1973
This 1973 quarterly research report examined clinical aspects of microwave exposure in laboratory animals, particularly dogs, focusing on temperature response and biological effects. The study represents early systematic research into microwave radiation's impact on living organisms. As part of ongoing research, this work helped establish foundational understanding of how microwave energy affects biological systems.
Abul Rashid · 1973
This 1973 theoretical study developed mathematical equations to describe how electromagnetic fields interact with human blood. The research proposed that blood's electrical conductivity and movement through the body creates the primary mechanism for EMF effects on human health. The work presented magnetohydrodynamic formulas relating field strength to blood velocity, density, pressure and temperature changes.
P. L. Rustan, W. D. Hurt, J. C. Mitchell · 1973
Researchers tested microwave oven radiation on cardiac pacemakers implanted in dogs and found interference occurred at extremely low power levels - less than 10 microwatts per square centimeter. Some pacemakers experienced dangerous rhythm changes including slow heartbeat, fast heartbeat, or complete shutdown when exposed to the same 2,450 MHz frequency used in commercial microwave ovens.
William L. Lappenbusch et al. · 1973
Researchers exposed over 1,000 Chinese hamsters to 2450 MHz microwave radiation (the same frequency used in microwave ovens) at 60 mW/cm² for 4 hours, then tested how this affected their survival after X-ray radiation. When microwaves were applied 5 minutes after X-ray exposure, the hamsters showed significantly better survival rates and faster recovery of their white blood cells.