TYPE-I ATRIAL-FLUTTER ABLATION GUIDED BY A BASKET CATHETER

Bidirectional isthmus conduction block has been associated with a low recurrence rate after atrial Butter ablation, We present the case of a type I, typical or ''counterclockwise'' atrial flutter ablation guide d by stimulation and recordings obtained from a basket catheter, which allowed for constant electrogram recording from splines positioned al ong the right lateral free wall and septum, After atrial flutter termi nation with radiofrequency application, the ability to record and stim ulate from multiple sites in the-atrium using the basket catheter was useful to detect residual bidirectional slow conduction through the is thmus, Complete isthmus block could be documented after additional rad iofrequency energy applications.