Fig. 4From: YKL-40 is highly expressed in the epicardial adipose tissue of patients with atrial fibrillation and associated with atrial fibrosisWestern blotting and quantitative real-time PCR results of collagen I (COL1A1) and collagen III (COL3A1) expression in the atrial myocardium of patients with atrial fibrillation (AF, n = 28) and sinus rhythm (SR, n = 36). a Western blotting results of AF patients and SR patients (representative samples). b Relative optical density of western blotting results in the AF and SR groups. Relative optical density of Collagen I in AF group was significantly higher than SR group. c Quantitative real-time PCR results from the AF and SR groups. Collagen I mRNA expression of AF group was significantly higher than SR group. *P < 0.001Back to article page