The prospective analysis of the results of the temporary transvenous-endocardial pacemaker therapy in 591 cases of treatment resulted in a total rate of complications of 37.1%. Hereby the main part of complications were disturbances of the function of electrodes (28.3%). The greatest numbers of complications showed infiltrable electrode catheters which were applied at bedside with a dislocation rate of 17.2% and a rate of not achieved stable stimulation positions of 13.7%. The smallest numbers of complications were to be observed in semiflexible stimulation catheters, which were positioned under X-ray control (dislocations in 4.1%, no achievement of a stable stimulation position in 3.3%). For the practice of the temporary pacemaker therapy from this analysis result particularly consequences in the choice of a suitable stimulation catheter and the methodical approach in positioning of this catheter.