[The characteristics of the reactions of excitable tissue to combined exposure to microwaves and low-intensity ultrasound].

Isolated pacemaker of the frog's heart served as a sensitive model to study the combined action of the low intensity electromagnetic and mechanic factors. Critical energy levels of factors, their relative efficiency in direct action on the cell were estimated. Additive effects of microwaves and ultrasound were examined. The data can be valuable for the further investigations concerning the effects of different nonionizing rays.