Figure 1.
A: A three-dimensional electroanatomical biatrial activation map (CARTO3) during typical atrial flutter. The activation wavefront is found to revolve in a counterclockwise manner around the TA. The atriotomy of superior transseptal approach line (blue dots) extends from the lateral wall of the right atrium through the septum to the roof of the left atrium. The brown dots indicate ablation points. B: An activation map of the right atrium during AT, which was induced after cavotricuspid isthmus ablation. The activation wavefront rotates the right atrial part of the incision line in a clockwise manner through the two penetration points of the incision. AT was rapidly terminated after the first radiofrequency application at conduction site (white asterisk) of the right atrial free wall.
The yellow line indicates the superior transseptal incision. The brown dots indicate ablation points. White circles indicate possible sites of IVC cannulation.
AT, atrial tachycardia; IVC, inferior vena cava; TA, tricuspid annulus; MA, mitral annulus.