Cardiac arrhythmias represent a common diagnostic and a frequent therapeutic problem [table 1]. They occur both in cardially sound people and in patients with a basic cardiac disease, their clinical significance reaching, therefore, from harmless to life-threatening episodes. For this reason, a documentation and characterization of the different arrhythmias is necessary in dinical practice in order to be able to initiate an adequate therapy in symptomatic and particularly in prognostically relevant cardiac arrhythmias.