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A 1-μT extremely low-frequency electromagnetic field vs. sham control for mild-to-moderate hypertension: a double-blind, randomized study
- Source :
- Hypertension Research. 34:372-377
- Publication Year :
- 2011
- Publisher :
- Springer Science and Business Media LLC, 2011.
-
Abstract
- The effects of extremely low-frequency electromagnetic fields (ELF-EMFs) on blood pressure (BP) are controversial. In this double-blind, randomized, sham-controlled study, we examined the effects of repeated exposure to a 1-μT ELF-EMF on BP in 20 humans with mild-to-moderate hypertension. Subjects were randomly assigned to either the ELF-EMF group or the sham group. Subjects in the ELF-EMF group were exposed to an ELF-EMF (6- and 8 Hz, respectively, peak magnetic field 1 μT, peak electric field 10 Vm(-1)) for at least two 10- to 15-min sessions per week, over a period of 4 weeks. In the sham group, the EMF-generating apparatus was not active. We obtained systolic and diastolic BP (SBP and DBP, respectively) measurements at registration and before and after each ELF-EMF exposure session. Subjects in the ELF-EMF and sham groups had mean ages of 52.8 and 55.1 years, and were exposed to a mean of 9.9 and 9.0 sessions, respectively. There was a significant difference between the ELF-EMF and sham groups with respect to change in SBP value between baseline and the end of the exposure regimen (P=0.02), but not with respect to change in DBP (P=0.21). There were no adverse events other than mild paresthesia of the hands of two subjects in the ELF-EMF group. Our results suggest that repeated exposure to an ELF-EMF has a BP-lowering effect on humans with mild-to-moderate hypertension.
- Subjects :
- Male
medicine.medical_specialty
animal structures
Physiology
Magnetic Field Therapy
Diastole
Blood Pressure
law.invention
Double blind
Double-Blind Method
Randomized controlled trial
law
Internal Medicine
medicine
Humans
Extremely low frequency
Paresthesia
Adverse effect
Aged
business.industry
Sham control
Middle Aged
respiratory system
Hand
Surgery
Regimen
Treatment Outcome
Blood pressure
Anesthesia
Hypertension
Female
Cardiology and Cardiovascular Medicine
business
Subjects
Details
- ISSN :
- 13484214 and 09169636
- Volume :
- 34
- Database :
- OpenAIRE
- Journal :
- Hypertension Research
- Accession number :
- edsair.doi.dedup.....548abd298c63f3e201d1df3c7767a1e1