Single-catheter validation of bidirectional block during atrial flutter ablation

Introduction Radiofrequency catheter ablation (RFCA) of typical atrial flutter (AFL) is an effective and widely performed method of treatment. Confirmation of conduction block in the cavotricuspid isthmus (CTI) is the best endpoint of the procedure. Electrophysiological measurements for validation of CTI block are usually performed using 2 or 3 catheters. However, in some situations this multi-catheter approach may not be possible or is associated with increased periprocedural risk. In such cases, the already implanted permanent pacemaker may be used to perform electrophysiological maneuvers. We present a case report of RFCA of AFL performed with a single-catheter set and acute electrophysiological success confirmation.