Identification of cavotricuspid isthmus voltage patterns in typical atrial flutter ablation.

Background: Electroanatomical mapping is an essential tool in the ablation of typical AFL.
Objectives: To identify the existence of voltage patterns in the CTI voltage maps and their relevance for typical AFL ablation.
Methods: A voltage map of the CTI was made prior to ablation, identifying the areas of maximum voltage and their location along the CTI, allowing classification into patterns according to their distribution. A stepwise ablation approach targeting the areas of maximum voltage was conducted. The ablation characteristics were compared based on the pattern obtained.
Results: Two voltage patterns were identified, with differences in ablation time to bidirectional CTI block. No complications occurred.
Conclusions: Voltage mapping identifies patterns in the CTI with implications for typical AFL ablation.
Competing Interests: The authors declare no conflict of interest.
(© 2024 The Authors. Journal of Arrhythmia published by John Wiley & Sons Australia, Ltd on behalf of Japanese Heart Rhythm Society.)