Character of the effect of microwave on conduction velocity of frog ventricular muscle.
Thirty-two frog hearts were divided into four groups and placed individually in temperature-controlled waveguides filled with Ringer's solution. The pacemaker was removed, and stimulation was provided at 0.3 Hz by three carbon-loaded Teflon electrodes located on the aorta and the ventricular muscle. Conduction velocity was measured from the difference between two action potentials. One group served as control; the three other groups were exposed for 2 h to pulsed 2,450 MHz microwave fields (10 microseconds, 0.001 duty cycle, 16 Hz modulation) at specific absorption rates (SARs) of 0.003, 2, and 6 W/kg, respectively. No significant difference in conduction velocity was found between the control and the exposed groups.
Yee
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KC
Neuroscience Medical Center, Seattle, WA 98115.
Chou
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CK
Guy
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AW
D000818:Animals; D001001:Anura; D006321:Heart / Q000502:physiology / Q000528:radiation effects*; D006329:Heart Conduction System / Q000502:physiology / Q000528:radiation effects*; D006352:Heart Ventricles; D008872:Microwaves; D009200:Myocardial Contraction / Q000528:radiation effects; D009431:Neural Conduction / Q000528:radiation effects*; D011690:Purkinje Fibers / Q000502:physiology / Q000528:radiation effects; D011829:Radiation Dosage