Foundation: cardiac pacemakers are being used frequently and during the last 20 years there have been described more indications for its use. In Cuba 2500 devices of this kind each year. Objective: to determine some clinical characteristics related to the procedure realized to patients with permanent pacemaker implants, re-implants or generator changes at the University General Hospital Dr. Gustavo Aldereguía Lima de Cienfuegos. Method: a cross descriptive study was done in series of cases, to

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... universe of 225 patients, who had an implant, re-implants or generator changes surgery at Service of Cardiology of the University General Hospital Dr. Gustavo Aldereguía Lima de Cienfuegos, between July 2016 and June 2018. The variable used were: age, sex, diagnosis for inserting a pacemaker, cause for changing the system or the generator, need of transient pacemaker, way of implant and mode of stimulation. Data processing was done by the statistic System SSPS 15.0 and Excel Microsoft. The results are expressed in tables through frequency and percentages. Results: with a predominance of the male sex, the age rate between 71 and 80 years old, the way of vein access was left subclavian, the most frequent implant reason was atrioventricular block degree III. The most frequent complication was pocket hematoma. Conclusions: pacemaker implantation is more common in elderly male patients. Third degree atrioventricular block, in the generator change the exhaustion of the battery of this. There were few complications.