K, Roschke J, Connemann B, Beta H.
study examined the effects of EMFs on the nervous system control of
the heart. It was done as part of the study described in the section
"Brain function in humans" (Mann and Roschke, Neuropsychobiology,1996;33:41-47).
Twelve young men were exposed or sham-exposed during sleep to 900
MHz, pulsed at a frequency of 217 Hz, with a pulse width of 577 microsecs.
The EMFs were close to the head. These are the conditions that exist
with the GSM cell phone system. Electrocardiographic (ECG) data were
collected to assess heart rate variability during different phases
of sleep. There was no difference in heart rate effects between the
RF exposure and the sham exposure. This suggests that the EMFs did
not have any effect on the brain control of the autonomic nervous
system that controls, among other things, heart rate.