Figure 3.
Relationship between left atrial size and function according to type of atrial fibrillation and stroke risk expressed in the CHADS2 score. (A) Increasing left atrial size, measured by left atrial volume index, appears more strongly related to type of atrial fibrillation (P < 0.001) than to stroke risk expressed in the CHADS2 score (P = 0.007). (B) Worsening left atrial emptying fraction appears more strongly related to type of atrial fibrillation (P < 0.001), than to the CHADS2 score (P = 0.041).