KCNN1 and atrial fibrillation: Paroxysmal AF (pAF) was associated with numerically increased KCNN1 levels in human LA (+78%, n = 10, p = 0.31) and significantly suppressed KCNN1 mRNA abundance in RA (−73%, n = 10, p = 0.010) tissue, respectively (Figure 1a,b).