KCNA3 and Paroxysmal atrial fibrillation: Also, Wiedmann et al. [44] aimed to study differential expression of selected miRNA in atrial tissue samples obtained from patients with sinus rhythm, paroxysmal AF, or permanent/chronic AF, and they found that miR‐25, miR‐21, miR‐34a, miR‐23a, miR‐124, miR‐1, and miR‐29b upregulation as well as miR‐9 and miR‐485 downregulation were associated with TASK‐1 potassium channel in patients with atrial cardiomyopathy.