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(Database last updated on Mar 27, 2024)
| ID Number | 560 | |
| Study Type | Human / Provocation | |
| Model | 900 MHz (GSM), 10-50 MHz (CW), 0.738-1.503 MHz (broadcast station), intermediate frequency RF exposure to humans and analysis of cardiovascular response | |
| Details | Human subjects occupationally exposed to 10-50 MHz RF fields at an approximated 0.5 - 2 hours per day at E-field levels of 9-174 V/m from radio transmitters were examined. Two independent studies were performed during a 24 hour period using an ambulatory blood pressure & heart rate monitor. RF exposure was also reported to be monitored over this time period, and cumulative individual RF doses were reported to range from 22 to 3,120 (V/m)2 per hour. Effects were reported for heart rate and blood pressure that correlated with RF exposure. The authors conclude RF exposure may lead to deregulation of autonomic control with increased risk of functional symptoms and cardiac failure. In recent studies relevant to mobile phone exposure, human volunteers (n = 10 male, 10 female) were exposed to 900 MHz (GSM) RF for 60 minutes at an undefined SAR (probably with the phone "hooked-up" to the network. The authors report exposure decreased male systolic blood pressure but not diastolic or heart rate. The same exposure did not effect either systolic or diastolic bp or hr in females. In males after exposure during the subsequent night, systolic and diastolic bp were both elevated slightly (by 4 & 2 mm Hg, respectively) with no change in hr. In females after exposure during the subsequent night, hr as well as systolic and diastolic bp were higher. The authors report a possible effect of mobile phone RF on hr and bp. Additional studies in Polish literature (Med Pr. (2004) 55(4):345-51; Med Pr. (2003) 54(3):291-7) also reported that exposure levels were within ICNIRP limits, residents living close to base station antennas did report various circulatory system ailments, sleep disturbances, irritability, depression, blurred vision, concentration difficulties, nausea, lack of appetite, headache and vertigo. In an earlier study, Workers (n = 71) occupationally exposed to intermediate frequency electromagnetic fields from broadcast stations were examined for circulatory endpoints. The authors report statistically significant correlations between exposure classification and electrical measurements of the heart, and conclude that chronic occupational exposure may result in impairments in cardiovascular function. AUTHORS' ABSTRACT: bortkiewicz et al. 2012 (IEEE #6709): Objectives: The aim of the study was to assess the mechanism of cardiovascular impairments in workers exposed to UHF-VHF radio frequency electromagnetic fields (EMF). Materials and Methods: Heart rate variability (HRV) was analysed using 512 normal heart beats registered at rest. The analysis concerned time-domain (STD R-R) and frequencydomain (VLF, LF, HF) parameters of HRV. Fifty nine workers (group I) with low-level and 12 workers (group II) with highlevel exposure were examined. The mean age of the subjects was 47±9 years and 41±14 years, and mean exposure duration 19.1±8.8 years and 13±4 years, in groups I and II, respectively. The groups were divided according to: Emax, Edose, Emean for frequencies UHF, VHF and UHF+VHF: The control group consisted of 42 non-exposed subjects, aged 49±8 years. Statistical analysis comprised one-way analysis of variance, covariance analysis and logistic regression models. Results: In the exposed groups, the heart rate was higher than in the control one. Standard deviation of R-R intervals (STD R-R) was found to be significantly (p = 0.0285) lower in group I (42.5±24.7 ms) compared to the control group (62.9±53.5 ms). The risk of lowered STD R-R was significantly increased (OR = 2.37, p = 0.023) in group II. Both exposed groups presented significantly higher VLF and LF values than the control group (p = 0.005 and p = 0.0025, respectively). The EMF-exposed groups were characterised by the dominance of the sympathetic system (LF/HF 1.3±0.35). Conclusions: The results indicate that exposure to radiofrequency EMF may affect the neurovegetative regulation. |
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| Findings | Effects | |
| Status | Completed With Publication | |
| Principal Investigator | Nofer Inst. Occup. Med., Poland - alab@sunlib.p.lodz.pl | |
| Funding Agency | AF, Poland | |
| Country | POLAND | |
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