Analysis of the effects of pulsed microwave on cardiac activity

Abstract The exposure of isolated chick embryo hearts to 2.45 GHz pulse modulated microwaves has identified certain phenomena: (1) when the heartbeat was irregular, an appropriate pulse repetition rate caused regularization; (2) during regular beating, an increase of pulse repetition rate similarly increased the heartbeat frequency, until an irregular heartbeat appeared; (3) by applying microwaves, when an arrhythmia occurs, a regular beat appeared after a few seconds. Time correlation between the heartbeat and the modulating pulses revealed that regularization occurs when the modulation pulses, at a frequency close to the natural unperturbed heartbeat, were applied in the ventricular diast…