Crista Terminalis as the Anterior Pathway of Typical XXXX : Insights from Entrainment Map with 3D Intracardiac Ultrasound.

@entity1 @entity956 @entity13678 @entity6480
BACKGROUND: The precise location of truly active reentry circuits of typical @entity956 ( @entity956 ) has not been well identified. The purpose of this study was to verify our hypothesis that the posterior block line is located along the posteromedial @entity13678 (PMRA) and the crista terminalis (CT) is the anterior pathway of @entity956 , with real-time intracardiac echo (ICE). METHODS: The entire @entity13678 ( @entity13678 ) three-dimensional activation and entrainment mapping were evaluated during @entity956 in 18 @entity1 using CARTO sound. RESULTS: The CT was clearly visualized by ICE and the local electrograms along the CT were single potentials in all the @entity1 . The CT was recognized as the truly active anterior pathway based on entrainment mapping in all @entity1 . Double potentials were recorded along the PMRA. Entire @entity13678 entrainment mapping could be performed in 16 @entity1 . The reentry circuits were separated into three passages. The first was around the tricuspid annulus (TA), the second the anterior superior vena cava ( @entity6480 ; @entity956 waves passed between the anterior @entity6480 and @entity13678 appendage), and the last the posterior @entity6480 (between the posterior @entity6480 and upper limit of the PMRA). All three of these passages were active in four, around the TA and anterior @entity6480 in eight, around the TA and posterior @entity6480 in three, and around only the anterior @entity6480 in one @entity1 . CONCLUSIONS: The CT functions as the anterior pathway of typical @entity956 , and the posterior block line was located along the PMRA. Dual or triple circuits were recognized in the majority of @entity956 @entity1 .
