Fig. 2.

Idealized unfolded representation of the endo- (left panel) and epicardial (right panel) surfaces of the left atrium indicating individual landmarks (only constituting landmarks of auxiliary lines are provided), auxiliary lines and atrial regions. Boundary conditions to generate regional surface fibers are provided in red and gray corresponding to (2.1) and (2.2), respectively, while (2.3) was applied to any remaining boundary. Abbreviations: LAA (left atrial appendage), MV (mitral valve), FO (fossa ovalis), RSPV (right superior pulmonary vein), RIPV (right inferior pulmonary vein), LSPV (left superior pulmonary vein) and LIPV (left inferior pulmonary vein). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)