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Figure 1 Intended line designs: anterior posterior projections of a mesh graph of the electroanatomic mapping system CARTO of an LA with the pulmonary veins (PV) and the trans-septal sheath depicted as colored tubes. Ablation lines are depicted by multiple red dots. (A) A long encircling line around all four PV ostia (roof line) and a connection to the lateral mitral annulus (MA). (B) Roof line between the right and left superior PV ostium. The anterior line connects the middle of the roof line to the superior MA; the posterior line aims at the inferior MA with an intentional gap of approximately 3 cm. (C) Two encircling lines around the ostia of the superior and inferior PVs on both the septal and lateral sides. Additional connections between the PV segments (posterior line), the lateral PV segment, and the MA. (D) Encircling lines around the PVs on both sides without additional connection lines.
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