Figure 2: Biatrial Activaton Maps During Sinus Rhythm Show the Centrifugal Spread from the Sinus Node to the Rest of the Biatrial Geometry.

The red colour in the scale corresponds to the earliest activation and blue to the last. LAO = left anterior oblique; LIPV = left inferior pulmonary vein; LSPV = left superior pulmonary vein; MA = mitral annulus; RAO = right anterior oblique; RIPV = right inferior pulmonary vein; RSPV = right superior pulmonary vein; TA = tricuspid annulus.