The insensitivity of frog heart rate to pulse modulated microwave energy

Frey and Seifert (1968) have reported that pulse modulated microwave irradiation of low average energy density can produce tachycardia in isolated frog hearts. In an effort to examine this phenomenon, two types of experiments were carried out: 1. frog hearts were irradiated in situ with 100 mus bursts of microwave energy at either 10.0 GHz or 1.42 GHz; 2. isolated frog hearts were irradiated with 100 mus bursts of microwave energy at 1.42 GHz. No significant changes in heart rate were observed.