Since new development of active and passive fixation electrodes with low dislodgement rates, we started ambulatory pacemaker implantation. Over a period of 19 months 124 patients were treated, 79 of them were treated as outpatients. We selected for the inpatient group, patients who were already in the intensive care unit, those absolutely pacemaker dependent or those who had difficulties during implantation. An ECG was recirded unneduateky after the implant. We compared atrial and ventricular threslds at implant and one month later, dislodgements and major complications. The results show that ambulatory surgery compard with inpatient surgery has the same rate of complications.