Pacemaker electrodes and problems related to cardiac pacing and sensing: current solutions and future trends.

The current status of cardiac electrical stimulation requires electrodes improvements both in pacing and sensing features. A short overview of today's electrode problems and solutions is followed by the presentation of a new pyrocarbon tip lead. The new tip material and the conception of the lead allow an increase in energy transfer efficiency and a retention of good sensing properties. Clinical experience confirms theoretical expectations. New methods for tissue reaction limitation are under evaluation.