[Comparative evaluation of various methods of continuous electric stimulation of the heart in bradycardia].

An analysis was made of the results from clinical application of various implanted systems of cardiac pacing, such as VVI for isolated ventricular pacing, AAI for atrial pacing, VDD, DVI, and DDD for dual chamber pacing, and "Activitrax" for rate responsive pacing. Indications and contraindications for the use of each cardiac pacing mode and possible complications were also considered.