[Potential danger to pacemaker patients during transurethral operations. Clinical and experimental studies].

The high sensitivity of modern demand pacemakers to HF-currents, as used for the TUR, could be shown by an in vitro model, animal experiments and clinical investigations. It was possible to characterise the type specific HF-sensitivity by means of individual functions. Furthermore, it could be proven that almost every external HF-signal could be blocked by switching the demand pacemaker to its fixed magnet frequency, a most important procedure in order to maintain patient safety during a transurethral resection.