Cardiovascular and thermal responses in rats during 94 GHz irradiation.

Abstract:

:We investigated the thermal distribution and cardiovascular effects produced by sustained exposure of rats to 94 GHz radio-frequency electromagnetic radiation (RFR). Sixteen ketamine-anesthetized Sprague-Dawley rats were exposed individually at a power density of 75 mW/cm2 under far-field conditions in E orientation. Irradiation began when colonic temperature was 37 degrees C and continued until death. Large, immediate increases in subcutaneous temperature on the irradiated side were accompanied by more moderate, delayed increases in colonic temperature. These body-temperature responses were similar to previous results obtained during 35 GHz RFR exposure. During irradiation, arterial blood pressure initially increased and then precipitously decreased until death. The heart rate increased throughout the exposure period. When comparing the results of these 94 GHz exposures with those in previous studies of lower RFR frequencies, it appears that the patterns of heart-rate and blood-pressure changes that occur before death are similar. We conclude that exposure to 94 GHz RFR produces extreme peripheral heating without similar levels of core heating and that this pattern of heat deposition is sufficient to produce circulatory failure and subsequent death.

journal_name

Bioelectromagnetics

journal_title

Bioelectromagnetics

authors

Jauchem JR,Ryan KL,Frei MR

subject

Has Abstract

pub_date

1999-01-01 00:00:00

pages

264-7

issue

4

eissn

0197-8462

issn

1521-186X

pii

10.1002/(SICI)1521-186X(1999)20:4<264::AID-BEM7>3.

journal_volume

20

pub_type

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