Figure 2: The possible propagation during SR and AT
The left panel shows the possible SR propagation in the RAO (A) and PA (D) views. The wavefront propagation from the SN was assumed in three directions. The first one was to propagate to the upper edge of the incision line, the second one was to propagate downward from the SN and bifurcated posteriorly and laterally, and the last one was to propagate through the gap of the incision line.
The middle one shows one of the possible AT circuits in RAO (B) and PA (E). The wavefront propagates the RA free wall around the incision line through the gap.
The right one shows one more possible AT circuit in RAO (C) and PA (F). The wavefront turns from the free wall to the septum around the linear LGE.
LGE-MRI = late-gadolinium enhancement magnetic resonance imaging; SR = sinus rhythm; AT = atrial tachycardia; RA = right atrial; SN = sinus node; RAA = right atrial appendage; TA = tricuspid annulus; IVC = inferior vena cava; RAO = right anterior oblique; PA = posterior-anterior.