Auricular flutter is a frequency arrhythmia, although data on its incidence and prevalence in the population are not precisely known. The development of cardiac electrophysiology led during the past twenty years to definite evidence of the reentry mechanism as the basis for auricular flutter and thus it was possible to differentiate two basic types of this arrhythmia according to the direction and site of the circular impulse - typical and atypical auricular flutter. A more detailed classification of different types of auricular flutter proved furthermore important in particular for the selection of a causal solution of this arrhythmia. First choice treatment of typical auricular flutter is nowadays catheterization radiofrequency ablation and not pharma- cological treatment. Particularly important complications associated with auricular flutter are thromboembolic complications which were till recently, as compared with auricular fibrillation, rather underrated. Several papers published in recent years however provide convincing evidence of the increased thromboembolic risk also in auricular flutter, similarly as stunning of the left atrium as a manifestation of mechanical dysfunction associated with cardioversion. Thus if the general practitioner diagnoses auricular flutter in a patient it is advisable to consult treatment with a department which specializes in treatment of cardiac arrhythmias and which should always attempt causal treatment which with the development of knowledge of this very interesting arrhythmia is becoming more readily available.

        Key words: arrhythmia - auricular flutter - catheterization ablation.