Rapid detection of isthmus block and rhythm change using local electrogram changes during complex atrial flutter ablation.

ABSTRACT:

Aims

Multiple re-entry circuits may operate simultaneously in the atria in the form of dual loop re-entry using a common isthmus, or multiple re-entrant loops without a common isthmus. When two or more re-entrant circuits coexist, ablation of an individual isthmus may lead to a seamless transition (without significant changes in surface electrocardiogram, coronary sinus activation or tachycardia cycle length) to a second rhythm, and the isthmus block can go unnoticed.

Methods and results

We hypothesize and subsequently illustrate in three patient cases, methods to rapidly identify a transition in the rhythm and isthmus block using local electrogram changes at the ablation site.

Conclusion

Local activation sequence changes, electrogram timing, and the behaviour of pre-

SUBMITTER: Padanilam BJ 

PROVIDER: S-EPMC10103578 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature