Dual Chamber map for effective ablation
CARTO system and Ensite system could annotate only atrial or
ventricular potentials and are not able to distinguish between atrial
and ventricular potentials during the same maps. However, the Rhythmia
system has an intelligent annotation technology and annotates the
largest bipolar potential, which enables distinguishing the atrial and
ventricular potentials all at once and can construct an atrioventricular
dual-chamber map without a manual reannotation9.
Accessory pathways are located at the atrio-ventricular (AV) annulus and
the understanding of the anatomical position of AV annulus is important
for ablation of APs. The dual chamber map enables us to understand this
important factor before the application of RF energy. Furthermore, the
continuous activation pattern of APs from one chamber to another chamber
was also useful to the understanding of the site of APs. As a result,
the number of radiofrequency applications, radiofrequency time, and
energy in the dual chamber map group were significantly lower than the
of the single chamber map group.