A new model of radiofrequency stimulator is presented, which can be programmed for the transmission of one or two impulses synchronised and delayed on the endocardial electrogram. This pacemaker was successfully used in jounctional reciprocating tachycardias and in a case of recurrent ventricular tachycardia. The implanted device, connected to the electrode catheter in right ventricle, does not contain energy sources. This lets a little size and allows having outside the body all the program controls, which in the time can have to change, due to variations of the parameters of tachycardias interruption. The implanted receiver is designed to induce in the resonant coil of external transmitter a frequency modulation proportional to the endocavitary signal. A slope detector receives this signal and programs on them the stimulating impulses, transmitted to stop the tachycardia. It is possible to manufacture such a simple device that the same patient can use it. Of course, periodic controls on the patient must be made to assess the cause of the tachycardia.
Cardiac Pacing, Artificial Humans