Table S1. Candidate variables in the regression model.

Figure S1. Mesh representing left atrial cavity (A) and detail of the mesh showing how three vertexes form a triangle (B).

Figure S2. Triangle defined by vertexes and vectors

Figure S3. Screen capture of self-customized software showing left atrial cavity with the best-fitting sphere (left-hand panel) and results of sphericity algorithm (right-hand panel).

Figure S4. Histogram of the left atrial sphericity distribution.

Figure S5. Arrhythmia-free cumulative survival after repeated procedure in the different LASP groups. LASP = Left Atrial Sphericity.

Figure S6. Receiver Operating Characteristic curves and area under the curve values for prediction of recurrence of left atrial (LA) volume, diameter, and sphericity.

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