Due to the widespread possibilities in therapy and rehabilitation, the number of active medical implants - mainly cardiac pacemakers - has increased rapidly during the last ten years. More and more younger people are included, who are active workers. In the cases, that relevant electromagnetic fields at the working place and within the outside environment exist, there is the possibility of electromagnetic interference with the pacemaker. This leads to the question, whether people carrying an active medical implant are endangered by the effect of interference during work. Although many investigations concerning this problem have been carried out, until now it is impossible to give general valid guidelines or procedures for the evaluation of the risk caused by EMF-interference. This statement is based on the fact, that after more than ten years work of national as well as international standard organisations no satisfying results are available. That means, in most cases the decision to stay on the job for workers after implantation has to be made as a "single-case-decision". In this publication the mentioned problems are described from the viewpoint of the occupational safety and health. Recommendations are given for a practical procedure for evaluating the deployment of workers carrying an active implant at workplaces with EMF-exposure.