[HIGH-DENSITY MAPPING OF ATYPICAL ATRIAL FLUTTER USING A PENTARAY].

This article describes clinical cases with complex cardiac arrhythmias after previous interventions. The aim of this article is to provide the first experience of using the PentaRay high-density mapping catheter in Kazakhstan (Biosense Webster, California, USA). Two clinical cases with the presence of several types of cardiac arrhythmias in each patient are described.