As previously described, lower PALS values, a novel echocardiography parameter, are associated with a high grade of fibrosis, and, thus, several fibrosis biomarkers have been proposed as predictors of AF recurrence, galectin-3 (Gal-3) and procollagen type III N terminal peptide (PIIINP) being among them. Here, LGALS3 is linked to atrial fibrillation.