Browse 8,700 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 543 studies in Cardiovascular
Michaelson · 1973
This 1973 technical report by Michaelson examined the clinical effects of microwave radiation exposure using animal studies. The research focused on developing systematic methods to study how microwave irradiation affects biological systems. This represents early foundational work in understanding microwave health effects during the initial decades of widespread microwave technology development.
Raymond L. H. Murphy et al. · 1973
Researchers tested whether doctors could accurately diagnose heart murmurs using microwave-transmitted stethoscope sounds from 2.7 miles away. The study found that all significant murmurs (grade 2/6 or higher) were correctly identified through the microwave telestethoscope system, though 2 of 32 very mild murmurs were missed. This 1973 research demonstrated that microwave transmission could enable remote cardiac diagnosis.
Mikolajczyk, H. · 1973
This 1973 study examined how microwave radiation kills laboratory rats through thermal effects, finding that death occurs when body temperature reaches 43°C (109°F). Researchers compared normal rats to those with removed pituitary glands to understand how hormonal systems affect survival during microwave heating. The study revealed that the body's natural cooling mechanisms fail when microwave energy absorption exceeds thermoregulation capabilities.
Nicholas P. D. Smyth et al. · 1973
Researchers tested 52 pacemaker patients against magnetic fields from airport weapons detectors (100 Hz to 450 kHz, 0.5-1.35 gauss) to assess hijacking prevention safety. Standard pacemakers showed no interference, while newer atrial and synchronous models had minimal, clinically insignificant effects. The study confirmed airport magnetic detectors pose no health risks to pacemaker patients.
D'cunha GF et al. · 1973
Researchers documented a patient whose Medtronic 5842 pacemaker malfunctioned near a television transmitter, causing repeated fainting episodes due to radio frequency interference. The problem was resolved by switching to a titanium-shielded pacemaker model that blocked the electromagnetic interference.
William H. Walter et al. · 1973
Researchers in 1973 tested various cardiac pacemakers against electromagnetic radiation found in urban environments. Many devices malfunctioned when exposed to EMF levels similar to those measured in a major metropolitan area, either switching to fixed-rate mode or shutting down completely. This early study revealed that life-saving medical devices were vulnerable to everyday electromagnetic interference.
B. Stefanov, I. Zlatarov, A. Solakov · 1973
This 1973 Bulgarian study examined how radiofrequency electromagnetic waves affected various body systems in workers exposed to RF radiation at different job sites. Researchers found that RF exposure impacted multiple organ systems including the nervous system, cardiovascular system, blood formation, and temperature regulation. The study represents early recognition that occupational RF exposure poses health risks across multiple biological systems.
Zoran Đorđević · 1973
This 1970 study examined how microwave radiation from radar equipment affected blood characteristics in radar operators. Researchers measured radiation intensity in radar units and analyzed changes in blood parameters among workers exposed to these microwaves. The research represents early occupational health investigation into microwave exposure effects on human blood.
R.G. Olson, C.H. Durney, J.L. Lords, C.C. Johnson · 1973
Researchers exposed isolated rat hearts to 960 MHz microwave radiation at power levels of 1.5 to 2.5 mW/cm³. Within two minutes, the hearts developed pronounced bradycardia (slowed heart rate) with both regular decreases and temporary cessations. This built on previous turtle heart studies showing similar cardiac effects from microwave exposure.
George F. D'Cunha et al. · 1973
A patient with a Medtronic 5842 pacemaker experienced repeated fainting episodes when near a television transmitter due to radio frequency interference disrupting the device's function. Switching to a titanium-shielded Medtronic 5942 pacemaker resolved the problem, demonstrating that RF fields from broadcast transmitters can interfere with certain medical devices.
Zoran Djordjevic, Aleksandar Kolak · 1973
This 1973 study exposed rats to 2400 MHz microwave radiation at 10 mW/cm² power density for chronic periods. Researchers found initial increases in blood cell counts that later normalized, slight temperature increases, and no significant effects on eye health or altitude tolerance. The study represents early research into microwave biological effects.
M. N. Sadchikov et al. · 1972
This 1972 Russian study examined two aspects of radiowave disease: blood circulation changes in the brain and peripheral areas using rheographic measurements, and immune system responses in animals exposed to prolonged ultra-high frequency radiation. The research represents early documentation of what Soviet scientists termed 'radiowave sickness' from occupational RF exposure.
Gidon F. Gestring, Wolfgang T. Koos, Fritz W. Boeck · 1972
This 1972 study examined what happens when surgical electrocoagulation equipment creates electrical current loops near the brain and spinal cord in animals. Researchers found that monopolar electrocoagulation caused dangerous side effects including sudden blood pressure spikes, breathing irregularities, heart rhythm problems, and cardiac arrest. The study showed that switching to bipolar electrocoagulation eliminated these life-threatening complications.
McCullough J, Polesky HF, Nelson C, Hoff T · 1972
This 1972 study examined a microwave device designed to rapidly warm blood for emergency transfusions, but discovered it caused hemolysis (destruction of red blood cells). Researchers found that microwave heating damaged blood cells, making the warming method potentially dangerous for patients receiving transfusions.
William D. Hurt · 1972
This 1972 technical report examined how 3050 MHz microwave radiation interferes with cardiac pacemaker function in animal subjects. The research investigated electromagnetic interference patterns at this specific frequency, which falls within ranges used for various industrial and communications applications. This early work helped establish understanding of how microwave frequencies can disrupt critical medical devices.
Raymond Pautrizel et al. · 1972
French researchers in 1972 exposed rabbits to electromagnetic fields and magnetic fields while feeding them high-cholesterol diets. The EMF treatment dramatically reduced blood cholesterol levels and other lipid abnormalities caused by the diet. The protective effects persisted even after stopping the electromagnetic exposure while continuing the high-cholesterol diet.
Blanchi, D., L. Cedrini, F. Ceria, E. Meda, G.G. Re · 1972
This 1972 study examined how strong 50 Hz electric fields (the frequency used in European power systems) affected mammalian test subjects, specifically looking at changes in white blood cells and electrical activity in the heart and brain. The research represents early scientific investigation into whether power frequency electromagnetic fields cause biological effects in living organisms.
Richard F. Boggs, Albert P. Sheppard, Alma Jeanne Clark · 1972
Researchers exposed human blood plasma to 2450 MHz microwave radiation (the same frequency used in microwave ovens) at power levels up to 280 mW/cm² for up to 24 hours. They found no significant changes in blood clotting processes, platelet count, or clot strength when temperatures stayed below body temperature. Interestingly, microwave heating to 37-42°C caused less blood clotting disruption than conventional heating to the same temperatures.
Fastrykovskii AD · 1972
This 1972 Soviet study investigated using microwave radiation as a therapeutic treatment for patients with hypertensive (high blood pressure) disease. The research represents early exploration of microwave therapy applications, examining how controlled electromagnetic field exposure might benefit cardiovascular health conditions.
Brindle GF, Lamarche Y, Pel'e JP · 1972
This 1972 study examined using microwave energy to heat cold preserved blood for medical transfusions. The research focused on whether microwave heating could safely warm stored blood without causing hemolysis (breakdown of red blood cells). This early work explored microwave applications in medical settings, decades before widespread concern about EMF health effects.
Milton M. Zaret · 1972
This 1972 clinical study examined various human injuries from nonionizing radiation, finding that eye damage patterns can reveal whether visible or invisible radiation caused the harm. The research proposed that 'elastic membrane fatigue' from environmental electromagnetic pollution might explain rising cardiovascular disease rates in urban areas.
Unknown authors · 1972
This 1972 journal article in Medical Instrumentation examined electromagnetic energy interactions with medical devices, particularly cardiac catheters. While specific findings aren't available, the research addressed early concerns about electromagnetic interference with life-critical medical equipment. This represents foundational work in understanding how EMF sources could affect medical device function and patient safety.
Charles Merckel · 1972
This 1972 review examined microwave radiation hazards from radar systems and early microwave ovens, finding proven lethal effects in animals and cataract formation in humans. The study warned about increasing commercial and domestic microwave use creating new exposure risks, especially for people with medical implants like pacemakers.
Jeffrey McCullough et al. · 1972
This 1972 medical study documented cases where microwave devices used to warm blood for transfusions caused hemolysis (destruction of red blood cells). The research identified microwave heating as a cause of iatrogenic complications, meaning medical treatment-induced problems that harmed patients during blood transfusion procedures.
William D. Hurt, M.S. · 1972
Researchers tested five different cardiac pacemaker models in dogs exposed to 3050 MHz microwave radiation to see if the devices would malfunction. Most pacemakers experienced electromagnetic interference under certain conditions, with the most sensitive unit failing at around 100 volts per meter of exposure. One pacemaker model showed no interference effects throughout all testing.