Figure 2From: Characteristics of acute congestive heart failure with normal ejection fraction and less elevated B-type natriuretic peptide Comparison of left atrial diameters (LAd) between B group and NB group. Patients in the NB group who had a history of open-heart surgery had marked left atrial enlargement. The boxes represent the 25th, 50th (median), and 75th percentiles, and the whiskers indicate the 10th and 90th percentiles.Back to article page