Medical/biological Study (experimental study)
Provocation study using heart rate variability shows microwave radiation from 2.4 GHz cordless phone affects autonomic nervous system. med./biol. By: Havas M, Marrongelle J, Pollner B, Kelley E, Rees CRG, Tully L
Published in: Giuliani L, Soffritti M (2010): "Non-thermal effects and mechanisms of interaction between electromagnetic fields and living matter", Mattioli 1885 (ISBN 978-88-6261-166-4, 403 pages): 273 - 300
Aim of study (according to author)
To study the effect of pulsed microwave exposure on heart rate variability in humans.
25 subjects participated (80 % females; age 37-79 years old).
General category: radio frequency field, PW (pulsed wave), DECT, cordless phone
FIELD View further expo parameters
partial body exposure: head
investigation on living organism
- effects on cardiovascular system: heart rate variability, blood pressure, heart rate (orthostatic test to check state of autonomic nervous system and relative fitness (first laying on the back and afterwards standing) and continuous monitoring during provocation (remaing laying down); RR interval)
- hypersensitivity/subjective complaints: questionnaire on hypersensitivity
investigated organ systems: cardiovascular system, autonomic nervous system
time of investigation: before, during and after exposure
Main outcome of study (according to author)
Results of the questionnaire: Based on self-assessments, participants classified themselves as extremely electrically sensitive (24 %), moderately (n=16 %), slightly (16 %), not sensitive (8 %) or with no opinion (36 %) about their sensitivity. The top 10 symptoms experienced by those claiming to be sensitive include memory problems, difficulty concentrating, eye problems, sleep disorder, feeling unwell, headache, dizziness, tinnitus, chronic fatigue, and heart palpitations. The five most common objects allegedly causing sensitivity were fluorescent lights,
antennas, mobile phones, WiFi, and cordless phones.
Data of the provocation study: 40 % of the subjects experienced some changes in their heart rate variability attributable
to the pulsed microwave exposure. For some the response was extreme (tachycardia), for others moderate to mild (changes in sympathetic nervous system and/or parasympathetic nervous system) and for some there was no observable reaction either because of high adaptive capacity or because
of systemic neurovegetative exhaustion.
This is the first study that documents immediate and dramatic changes in both heart rate and heart rate variability associated with microwave exposure at levels well below (0.5 %) guidelines in Canada and the United States (1000
(Study character: medical/biological study, experimental study, pilot/exploratory/preliminary study, double-blind study, provocation study)
Study funded byRelated articles
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Glossary: adaptive, antennas, biological, blood pressure, cardiovascular system, chronic, cordless phones, DECT, dizziness, double-blind study, endpoint, exposure, eye, fatigue, fluorescent, headache, heart, heart rate, heart rate variability, human, hypersensitivity, memory, microwave, mobile phones, neurovegetative, organism, parasympathetic nervous system, partial body exposure, pilot/exploratory/preliminary study, power flux density, provocation, provocation study, pulsed, PW, questionnaire, radio frequency field, RR interval, sensitivity, sleep disorder, subjective complaints, subjects, sympathetic nervous system, symptoms, systemic, tachycardia, tinnitus, WiFi
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