Using published reports (table S1) of the miRs altered in atrial tissue or cells in AF, we identified, using in silico mirDIP analysis at https://ophid.utoronto.ca/mirDIP/, four miRs (hsa-miR-24–3p, - 30d-5p, −31–5p and 34a-5p), which are strongly predicted to bind CTR-mRNA (CALCR) 3’UTR (fig. The gene discussed is CALCR; the disease is atrial fibrillation.