[Recent progress in energy sources and in technology of electronic circuits (author's transl)]

Since 1957, when the first implantable pacemaker was developed, the performances of cardiac pacemakers have enormously improved. The paper describes the recent progress in the field of energy sources, technology and circuit solutions. The improvements achieved up to now have extended the mean life-time of an implantable pacemaker from about 30 months up to more than 6 years, while some pacemakers with programming capabilities are available and pacemakers with self-adapting capabilities to the individual hemodynamic needs are in the stage of advanced development.