Click on image to view larger version.

Figure 1 B-type natriuretic peptide (BNP) levels in patients with and without atrial fibrillation and with and without a final diagnosis of acute heart failure. In patients without heart failure, BNP levels were significantly higher in patients with atrial fibrillation than in those without (p < 0.001). In patients with heart failure, BNP levels were not significantly different between patients with and without atrial fibrillation. B-type natriuretic peptide levels are plotted on a log scale. The boxes represent the 25th, 50th, and 75th percentiles, and the whiskers indicate the 10th and 90th percentiles.