Impact of LA size on LGE-MRI accuracy. Impact of LA size on the magnitude of the association between IIR and CV. (A) Correlation between LA diameter and IIR accuracy. (B) Comparison between IIR accuracy to predict CV and LA size. *P < 0.05. CV, conduction velocity; IIR, image intensity ratio; LA, left atrial diameter; LGE-MRI, late gadolinium enhanced-magnetic resonance imaging.